Intro to Networks Midterm Study (Module 1-3)

What are the two sizes (minimum and expected maximum) of an Ethernet frame? (Choose two.) *64 bytes *1024 bytes *128 bytes *56 bytes *1518 bytes

*64 bytes *1518 bytes

Which of the following are data link layer protocols? (Choose three) *802.11 *Ethernet *IP *PPP *UDP

*802.11 *Ethernet *PPP

What two protocols are used to determine the MAC address of a known destination device IP address (IPv4 and IPv6)? *DHCP *ARP *DNS *ND

*ARP *ND

What Layer 2 function does a router perform? (Choose three.) *Accepts a frame from a medium *De-encapsulates the frame *Refers to its Layer 3 routing table for a matching destination network *Re-encapsulates the packet into a new frame

*Accepts a frame from a medium *De-encapsulates the frame *Re-encapsulates the packet into a new frame

Which two commands would return you to the privileged EXEC prompt regardless of the configuration mode you are in? (Choose two.) *CTRL+Z *disable *enable *end *exit

*CNTRL+Z *end

Which two protocols are service discovery protocols? (Choose two.) *DNS *TCP *SSH *DHCP

*DNS *DHCP

Which two protocols belong in the TCP/IP model application layer? *EIGRP *DNS *OSPF *ICMP *DHCP

*DNS *DHCP

Formatting *Flow Control *Sequence Numbers Access Method *Retransmit Time *Response Timeout

*Flow Control *Access Method *Response Timeout

Which three acronyms/initialisms represent standards organizations? (Choose three.) *MAC *IANA *TCP/IP *IEEE *IETF *OSI

*IANA *IEEE *IETF

Which two protocols function at the internet layer? (Choose two.) *IP *PPP *POP *ICMP *BOOTP

*IP *ICMP

Which three options are major issues associated with IPv4? (Choose three.) *IP address depletion *increased network complexity and Internet routing table expansion *always on connections *lack of end-to-end connectivity *global and political boundaries *too many IPv4 addresses available

*IP address depletion *increased network complexity and Internet routing table expansion *lack of end-to-end connectivity

Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.) *IPv4 addresses are 128 bits in length *IPv6 addresses are represented by hexadecimal numbers *IPv6 addresses are 64 bits in length *IPv6 addresses are 32 bits in length *IPv4 addresses are represented by hexadecimal numbers *IPv4 addresses are 32 bits in length.

*IPv6 addresses are represented by hexadecimal numbers. *IPv4 addresses are 32 bits in length.

Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.) *Internet Assigned Numbers Authority (IANA) *Electronic Industries Alliance (EIA) *Internet Society (ISOC) *International Telecommunication Union (ITU) *Institute of Electrical and Electronics Engineers (IEEE)

*International Telecommunication Union (ITU) *Institute of Electrical and Electronics Engineers (IEEE)

Which two functions or operations are performed by the MAC sublayer? (Choose two.) *It performs the function of NIC driver software. *It handles communication between upper and lower layers. *It is responsible for Media Access Control. *It adds a header and trailer to form an OSI Layer 2 PDU. *It adds control information to network protocol layer data.

*It is responsible for Media Access Control. *It adds a header and trailer to form an OSI Layer 2 PDU.

What are two services performed by the data link layer of the OSI model? (Choose two.) *It determines the path to forward packets *It fragments data packets into the MTU size. *It monitors the Layer 2 communication by building a MAC address table. It accepts Layer 3 packets and encapsulates them into frames *It provides media access control and performs error detection

*It monitors the Layer 2 communication by building a MAC address table. It accepts Layer 3 packets and encapsulates them into frames *It provides media access control and performs error detection

What are two benefits of using a layered network model? (Choose two.) *It prevents designers from creating their own model. *It ensures a device at one layer can function at the next higher layer *It prevents technology in one layer from affecting other layers. *It speeds up packet delivery. It assists in protocol design.

*It prevents technology in one layer affecting other layers. *It assists in protocol design

Which two characteristics describe Ethernet technology? (Choose two.) *It uses a ring topology. *It typically uses an average of 16 Mbps for data transfer rates. *It is supported by IEEE 802.5 standards. *It uses unique MAC addresses to ensure that data is sent to the appropriate destination. *It is supported by IEEE 802.3 standards.

*It uses unique MAC addresses to ensure that data is sent to the appropriate destination. *It is supported by IEEE 802.3 standards.

The IEEE 802 LAN/MAN data link layer consists of which two sublayers? (Choose two.) *Network Control Protocol *Logical Link Control *Media Access Control *Link Control Protocol

*Logical Link Control *Media Access Control

What are the two sublayers of the OSI model data link layer? (Choose two.) *physical *network access *internet *MAC *transport *LLC

*MAC *LLC

What two functions are provided by ARP? (Choose two.) *Maintains a table of IPv4 address to domain names *Maintains a table of IPv4 to MAC address mappings *Maintains a table of IPv6 to MAC address mappings *Resolves IPv4 addresses to domain names *Resolves IPv4 addresses to MAC addresses *Resolves IPv6 addresses to MAC addresses

*Maintains a table of IPv4 to MAC address mappings *Resolves IPv4 addresses to MAC addresses

Which of the following statements are true regarding network layer and data link layer addresses? (Choose three.) *Data link layer addresses are logical and network addresses are physical *Network layer addresses are expressed as 12 hexadecimal digits and data link layer addresses are decimal. *Network layer addresses are logical and data link addresses are expressed as 12 hexadecimal digits. *Data link layer addresses are physical and network layer addresses are logical *Network layer addresses are either 32 or 128 bits in length. *Data link layer addresses are 32 bits in length.

*Network layer addresses are logical and data link addresses are expressed as 12 hexadecimal digits. *Data link layer addresses are physical and network layer addresses are logical *Network layer addresses are either 32 or 128 bits in length.

What is a function of the MAC sublayer? (Choose three.) *controls access to the media *checks for errors in received bits *uses CSMA/CD or CSMA/CA to support Ethernet technology *communicates between software at the upper layers and the device hardware at the lower layers *allows multiple Layer 3 protocols to use the same network interface and media

*controls access to the media *checks for errors in received bits *uses CSMA/CD or CSMA/CA to support Ethernet technology

What are two methods for switching data between ports on a switch? (Choose two.) *cut-off switching *cut-through switching *store-and-forward switching *store-and-supply switching *store-and-restore switching

*cut-through switching *store-and-forward switching

What does the data link layer add to a Layer 3 packet to create a frame? (Choose two.) *flags *sequence number *header *trailer

*header *trailer

Which two options are improvements provided by IPv6 as compared to IPv4? (Choose two.) *header supports additional fields for complex packets *increased the IP address space *standardizes the use of NAT *supports class-based networks *uses a simpler header to provide improved packet handling

*increased the IP address space *uses a simpler header to provide improved packet handling

Which is true of the IPv6 header? *it consists of 20 octets. *it consists of 40 octets. *it contains 8 header fields. *it contains 12 header fields.

*it consists of 40 octets. *it contains 8 header fields.

Which two ICMPv6 messages are used in to determine the MAC address of a known IPv6 address? *neighbor advertisement *neighbor solicitation *router advertisement *router solicitation

*neighbor advertisement *neighbor solicitation

Which two commands could be entered on a Windows host to view its IPv4 and IPv6 routing table? (Choose two.) *netroute -l *netstat -r *print route *route print *print net

*netstat -r *route print

Which two types of memory buffering techniques are used by switches? (Choose two.) *long-term memory buffering *port-based memory buffering *shared memory buffering *short-term memory buffering

*port-based memory buffering *shared memory buffering

Which two ICMPv6 messages are used in SLAAC? *neighbor advertisement *neighbor solicitation *router advertisement *router solicitation

*router advertisement *router solicitation

Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.) *router solicitation *neighbor advertisement *echo request *neighbor solicitation *router advertisement

*router solicitation *neighbor advertisement

Which two devices are intermediary devices? (Choose two) *hosts *routers *servers *switches

*routers *switches

Which two Internet connection options do not require that physical cables be run to the building? (Choose two.) *satellite *DSL *dedicated lease line *cellular *dialup

*satellite *cellular

What are the two most commonly referenced fields in an IPv4 packet header that indicate where the packet is coming from and where it is going? (Choose two.) *destination IP address *protocol *Time to Live *source IP address *Differentiated Services (DS)

*source IP address *destination IP address

When a hostname is configured through the Cisco CLI, which three naming conventions are part of the guidelines? (Choose three.) *the hostname should be written in all lower case characters. *the hostname should end with a special character. *the hostname should begin with a letter. *the hostname should be fewer than 64 characters in length. *the hostname should contain no spaces.

*the hostname should begin with a letter. *the hostname should be fewer than 64 characters in length. *the hostname should contain no spaces.

What is the special value assigned to the first 24 bits of a multicast MAC address transporting an IPv4 packet?

01-00-5E

To what subnet does the IP address 10.1.100.50 belong if a subnet mask of 255.255.0.0 is used?

10.1.0.0

What is the dotted decimal representation of the IPv4 address which is represented as the binary string 00001010.01100100.00010101.00000001?

10.100.21.1

Which of the following is the binary equivalent to the 172.16.31.30 IP address?

10101100.00010000.00011111.00011110

What is the binary representation for the decimal number 173?

10101101

Which is the binary equivalent to the 192.168.11.10 IP address?

11000000.10101000.00001011.00001010

What is the binary representation of 0xCA?

11001010

What is the binary equivalent of the decimal number 232?

11101000

Which of the following is the decimal equivalent of 7D?

125

Which IPv4 address can a host use to ping the loopback interface?

127.0.0.1

How many binary bits exist within an IPv6 address?

128

What is the decimal equivalent of the binary number 10010101?

149

Which is the decimal equivalent of A9?

169

What is the decimal equivalent of 0xC9?

201

What is the dotted decimal representation of the IPv4 address 11001011.00000000.01110001.11010011?

203.0.113.211

Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?

236.17.12.10

How many bits are in an IPv4 address?

32

What is the decimal equivalent of the hex number 0x3F?

63

Which statement is true about ARP?

ARP entries are cached temporarily

What is an attack using ARP?

ARP poisoning

Which access method would be the most appropriate if you call your manager to tell him you cannot access your router in another city over the internet and he provides you with the information to access the router through a telephone connection?

Aux

Which of the following wireless standards is used for Personal Area Networks (PANs) and allows devices to communicate over distances of 1 to 100 meters?

Bluetooth

Which is the hexadecimal equivalent of 202?

CA

What method is used to manage contention-based access on a wireless network?

CSMA/CA

Which data link layer media access control method does Ethernet use with legacy Ethernet hubs?

CSMA/CD

Which feature contains options such as Public, Private, Custom and Hybrid?

Cloud Computing

Which access method would be most appropriate if you were in the equipment room with a new switch that needs to be configured?

Console

Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64 bytes?

Data Field

The physical layer of the receiving device passes bits up to which higher level layer?

Data Link

Which statement describes the half-duplex mode of data transmission?

Data that is transmitted over the network flows in one direction at a time

Which field in an IPv4 packet header will typically stay the same during its transmission?

Destination Address

Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated?

EtherType

Which protocol operates at the network access layer of the TCP/IP model?

Ethernet

Which network infrastructure might an organization use to provide secure and safe access to individuals who work for a different organization but require access to the organization's data?

Extranet

Which is the hexadecimal equivalent of 254?

FE

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF

True or false. Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance.

False

True or false. Wireless is not well suited for enterprise networks.

False

True or false? The physical layer is only concerned with wired network connections.

False

True or false? When a frame is encoded by the physical layer, all bits are sent over the media at the same time.

False

Which option blocks unauthorized access to your network?

Firewall

Which step of the communication process is concerned with properly identifying the address of the sender and receiver?

Formatting

What PDU is received by the physical layer for encoding and transmission?

Frame

Which part of an Ethernet frame detects errors in the frame?

Frame Check Sequence

A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?

HTTP, TCP, IP, Ethernet

Which field is used to detect corruption in the IPv4 header?

Header Checksum

Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?

Hop Limit

Which organization defines standards for the network access layer (i.e., the OSI physical and data link layers)?

IEEE

Which standards organization oversees development of wireless LAN standards?

IEEE

A device receives a data link frame with data and processes and removes the Ethernet information. What information would be the next to be processed by the receiving device?

IP at the internet layer

What type of information is contained in an ARP table?

IPv4 address to MAC address mappings

What addresses are mapped by ARP?

IPv4 address to a destination MAC address

Which statement accurately describes a characteristic of IPv4?

IPv4 has a 32-bit address space

Which connections are specialized ports on a networking device that connect to individual networks?

Interface

This standards organization is concerned with the Request for Comments (RFC) documents that specify new protocols and update existing ones.

Internet Engineering Task Force (IETF)

Which function or operation is performed by the LLC sublayer?

It communicates with upper protocol layers

Which statement correctly describes frame encoding?

It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits

What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?

It forwards the frame out of all ports except for the port at which the frame was received

What is the function of the shell in an OS?

It interfaces between the users and the kernel.

What is one advantage of using fiber optic cabling rather than copper cabling?

It is able to carry signals much farther than copper cabling.

What is an ISP?

It is an organization that enables individuals and businesses to connect to the Internet.

What is the purpose of the banner motd command?

It provides a way to make announcements to those who log in to a router

What is the Internet?

It provides connections through interconnected global networks.

Which action is taken by a Layer 2 switch when it receives a Layer 2 broadcast frame?

It sends the frame to all ports except the port on which it received the frame

What will a host on an Ethernet network do if it receives a frame with a unicast destination MAC address that does not match its own MAC address?

It will discard the frame

Which data link sublayer controls the network interface through software drivers?

LLC

Which data link sublayer works with the upper layers to add application information for delivery of data to higher level protocols?

LLC

What is another name for the OSI data link layer?

Layer 2

The ARP table in a switch maps which two types of address together?

Layer 3 address to a Layer 2 address

Which statement about host forwarding decisions is true?

Local hosts can reach each other without the need of a router

Which type of network topology lets you see which end devices are connected to which intermediary devices and what media is being used?

Logical Topology

What is true concerning physical and logical topologies?

Logical topologies refer to how a network transfers data between devices

What attribute of a NIC would place it at the data link layer of the OSI model?

MAC address

What identifier is used at the data link layer to uniquely identify an Ethernet device?

MAC address

Which delivery method is used to transmit information to one or more end devices, but not all devices on the network?

Multicast

Which connection physically connects the end device to the network?

NIC

Which memory location on a Cisco router or switch stores the startup configuration file?

NVRAM

Which type of network topology lets you see the actual location of intermediary devices and cable installation?

Physical Topology

Which feature is being used when connecting a device to the network using an electrical outlet?

Powerline

Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?

Preamble

Which field includes common values such as ICMP (1), TCP (6), and UDP (17)?

Protocol

What is the responsibility of the MAC sublayer?

Provides the method to get the frame on and off the media

With which type of policy, a router can manage the flow of data and voice traffic, giving priority to voice communications if the network experiences congestion?

QoS

Where is the ARP table stored on a device?

RAM

Which router component holds the routing table, ARP cache, and running configuration file?

RAM

An administrator is configuring a new router to permit out-of-band management access. Which set of commands will allow the required login using a password of cisco?

Router(config)# line console 0 Router(config-line)# password cisco Router(config-line)# login

Which command is used to encrypt all passwords in a router configuration file?

Router_A(config) # service password-encryption

Which of the following counters EMI and RFI by using shielding techniques and special connectors?

STP

When designers follow accepted standards and protocols, which of the four basic characteristics of network architecture is achieved?

Scalability

Confidentiality, integrity, and availability are requirements of which of the four basic characteristics of network architecture?

Security

During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. Which type of threat is affecting this computer?

Spyware

This protocol is responsible for guaranteeing the reliable delivery of information.

TCP

Which access method would be the most appropriate in-band access to the IOS over a network connection?

Telnet/SSH

Which is true of the IPv6 packet header?

The Hop limit field replaces the IPv4 Time to Live field

Which characteristic describes an IPv6 enhancement over IPv4?​

The IPv6 header is simpler than the IPv4 header is, which improves packet handling

Which field in an IPv6 packet is used by the router to determine if a packet has expired and should be dropped?

The MAC address of the destination device

What destination MAC address would be included in a frame sent from a source device to a destination device on a remote local network?

The MAC address of the local router interface

How does the network layer use the MTU value?

The MTU is passed to the network layer by the data link layer

A router boots and enters setup mode. What is the reason for this?

The configuration file is missing from NVRAM

Which default gateway statement is true?

The default gateway address is the IP address of the router on the local network

A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?

The end-user device needs mobility when connecting to the network

Which statement is true about MAC addresses?

The first three bytes are used by the vendor assigned OUI

What happens to runt frames received by a Cisco Ethernet switch?

The frame is dropped

A computer has to send a packet to a destination host in the same LAN. How will the packet be sent?

The packet will be sent directly to the destination host

What addressing information is recorded by a switch to build its MAC address table?

The source Layer 2 address of incoming frames

Which statement is correct about IPv4 packet header fields?

The source and destination IPv4 addresses remain the same while traveling from source to destination

Why are two strands of fiber used for a single fiber optic connection?

They allow for full-duplex connectivity

Which is a characteristic of static routes?

They manually configured

What statement describes a characteristic of MAC addresses?

They must be globally unique

A PC is configured to obtain an IPv4 address automatically from network 192.168.1.0/24. The network administrator issues the arp -a command and notices an entry of 192.168.1.255 ff-ff-ff-ff-ff-ff. Which statement describes this entry?

This is a static map entry

True or False? A router can be configured with a combination of both static routes and a dynamic routing protocol.

True

True or false. Standards organizations are usually vendor-neutral.

True

True or false? Frames exchanged between devices in different IP networks must be forwarded to a default gateway.

True

Which of the following is the most common network media?

UTP

When a connectionless protocol is in use at a lower layer of the OSI model, how is missing data detected and retransmitted if necessary?

Upper-layer connection-oriented protocols keep track of the data received and can request retransmission from the upper-level protocols on the sending host

What is the default SVI on a Cisco switch?

VLAN1

An employee wants to access the network of the organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network?

VPN

Which option creates a secure connection for remote workers?

Virtual Private Network (VPN)

Which option describes malicious code running on user devices?

Virus, work, or Trojan horse

What kind of network would use point-to-point, hub and spoke, or mesh topologies?

WAN

Which network infrastructure provides access to other networks over a large geographical area, which is often owned and managed by a telecommunications service provider?

WAN

Which feature uses the same cellular technology as a smartphone?

Wireless Broadband

Which of the following wireless standards is best suited for industrial and IoT environments?

Zigbee

In which scenario would the use of a WISP be recommended?

a farm in a rural area without wired broadband access

What is auto-MDIX?

a feature that detects Ethernet cable type

What does a code of "O" indicate next to a route in the routing table?

a route learned dynamically from OSPF

Which device performs the function of determining the path that messages should take through internetworks?

a router

What type of address is 01-00-5E-0A-00-02?

an address that reaches a specific group of hosts

A technician is configuring a router to allow for all forms of management access. As part of each different type of access, the technician is trying to type the command login. Which configuration mode should be entered to do this task?

any line configuration mode

A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?

arp -a

Which statement regarding the service password-encryption command is true?

as soon as the service password-encryption command is entered, all currently set passwords formerly displayed in plain text are encrypted

Which functionality is provided by DHCP?

automatic assignment of an IP address to each host

What feature automatically negotiates the best speed and duplex setting between interconnecting devices?

autonegotiation

Which of these is the name for the capacity of a medium to carry data?

bandwidth

Which is the command to configure a banner to be displayed when connecting to a switch?

banner motd $ Keep out $

Which delivery method does not guarantee that the packet will be delivered fully without errors?

best effort

What type of communication will send a message to all devices on a local area network?

broadcast

Which message delivery option is used when all devices need to receive the same message simultaneously?

broadcast

What is a characteristic of UTP cabling?

cancellation

Which media access control method is used in legacy Ethernet LANs?

carrier sense multiple access/collision detection

Which of the following attaches antennas to wireless devices? It can also be bundled with fiber-optic cabling for two-way data transmission.

coaxial

Which of the following terminates with BNC, N type and F type connectors?

coaxial

Which media uses electrical pulses to represent bits?

copper

Which switching method can be implemented using fast-forward switching or fragment-free switching?

cut-through switching

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

data link

Which protocol stack layer encapsulates data into frames?

data link

Which layer is responsible for taking an IP packet and preparing it for transmission over the communications medium?

data link layer

What process is used to receive transmitted data and convert it into a readable message?

decoding

This type of route is also known as a gateway of last resort.

default route

When a router receives a packet, what information must be examined in order for the packet to be forwarded to a remote destination?

destination IP address

Which information is used by routers to forward a data packet toward its destination?

destination IP address

Which logical address is used for delivery of data to a remote network?

destination IP address

What is the order of the two addresses in the data link frame?

destination MAC, source MAC

Which lists the Layer 2 and Layer 3 address fields in the correct order?

destination NIC address, source NIC address, source IP address, destination IP address

Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?

dotted decimal

What is the structure of an IPv4 address called?

dotted-decimal format

What types of standards are developed by the Electronics Industries Alliance (EIA)?

electric wiring and connectors

How is the privileged EXEC mode access secured on a switch?

enable secret class

Company policy requires using the most secure method to safeguard access to the privileged exec and configuration mode on the routers. The privileged exec password is trustknow1. Which of the following router commands achieves the goal of providing the highest level of security?

enable secret trustknow1

What is the name of the process of adding protocol information to data as it moves down the protocol stack?

encapsulation

What process is used to place one message inside another message for transfer from the source to the destination?

encapsulation

Which LAN topology is a hybrid topology?

extended star

Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?

extranet

Which is a valid hexadecimal number?

f

Which media uses patterns of light to represent bits?

fiber-optic

How is an IPv4 address represented?

four decimal numbers between 0 and 255 separated by periods

What is the term for splitting up an IP packet when forwarding it from one medium to another medium with a smaller MTU?

fragmentation

Which IOS mode are you in if the Switch(config)# prompt is displayed?

global configuration mode

Which duplex communication method is used in WLANs?

half-duplex

What is the command to assign the name "Sw-Floor-2" to a switch?

hostname Sw-Floor-2

Which of the following is the name for all computers connected to a network that participate directly in network communication?

hosts

What is done to an IP packet before it is transmitted over the physical medium?

it is encapsulated in a Layer 2 frame

Which topology displays networking device layer IP addresses?

logical topology

Which command enables password authentication for user EXEC mode access on a switch?

login

A technician has been asked to develop a physical topology for a network that provides a high level of redundancy. Which physical topology requires that every node is attached to every other node on the network?

mesh

To what type of address are ICMPv6 neighbor solicitation messages sent?

multicast

Which type of communication will send a message to a group of host destinations simultaneously?

multicast

Which of the following fiber-optic cable types can help data travel approximately 500 meters?

multimode

Which of the following fiber-optic cable types is used within a campus network?

multimode

Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

multimode

Which command can be used on a Windows host to display the routing table?

netstat -r

A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?

physical layer

What will be the response from the router after the command, "router(config)# hostname portsmouth" is entered?

portsmouth(config)#

Which type of access is secured on a Cisco router or switch with the enable secret command?

privileged EXEC

Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting?

privileged EXEC mode

What is the general term that is used to describe a piece of data at any layer of a networking model?

protocol data unit

What is the purpose of protocols in data communications?

providing the rules required for a specific type of communication to occur

What is one function of the ARP protocol?

resolving an IPv4 address to a MAC address

What type of cable is used to connect a workstation serial port to a Cisco router console port?

rollover

BGP and OSPF are examples of which type of protocol?

routing

What is the process of dividing a large data stream into smaller pieces prior to transmission?

segmentation

Which command could be used on a Cisco router to view its ARP table?

show ip arp

Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status?

show ip interface brief

What is the command used on a Cisco IOS router to view the routing table?

show ip route

Which of the following fiber-optic cable types can travel approximately 100 km?

single-mode

Which of the following fiber-optic cable types is used to connect long-distance telephony and cable TV applications?

single-mode

Which of the following fiber-optic cable types use lasers in a single stream as a data light source transmitter?

single-mode

What information is added during encapsulation at OSI Layer 3?

source and destination IP address

What type of physical topology can be created by connecting all Ethernet cables to a central device?

star

Which type of UTP cable is used to connect a PC to a switch port?

straight-through

What is used to determine the network portion of an IPv4 address?

subnet mask

Which network device has the primary function to send data to a specific destination based on the information found in the MAC address table?

switch

Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?

switch

What type of interface has no physical port associated with it?

switch virtual interface (svi)

When an IPv4 packet is sent to a host on a remote network, what information is provided by ARP?

the MAC address of the router interface closest to the sending host

What is the definition of bandwidth?

the amount of data that can flow from one place to another in a given amount of time

Which characteristic describes crosstalk?

the distortion of the transmitted messages from signals carried in adjacent wires

What type of network must a home user access in order to do online shopping?

the internet

Which characteristic describes the default gateway of a host computer?

the logical address of the router interface on the same network as the host computer

What is indicated by the term throughput?

the measure of the bits transferred across the media over a given period of time

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal

the microwave oven

What is stored in the NVRAM of a Cisco router?

the startup configuration

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

the use of full-duplex capable Layer 2 switches

Which of these is a measure of the transfer of bits across the media?

throughput

What is the purpose of the startup configuration file on a Cisco router?

to contain the commands that are used to initially configure a router on startup

In computer communication, what is the purpose of message encoding?

to convert information to the appropriate form for transmission

Why would a technician enter the command copy startup-config running-config?

to copy an existing configuration into RAM

How does the ARP process use an IPv4 address?

to determine the MAC address of a device on the same network

What is the function of the last field in a data link layer frame?

to determine whether the frame experienced transmission errors

Which is a function of the Logical Link Control (LLC) sublayer?

to identify which network layer protocol is being used

What is the purpose of ARP in an IPv4 network?

to obtain a specific MAC address when an IP address is known

What was the reason for the creation and implementation of IPv6?

to relieve IPv4 address depletion

What is the purpose of the sequencing function in network communication?

to uniquely label transmitted segments of data for proper reassembly by the receiver

What is the purpose of the OSI physical layer?

transmitting bits across the local media

Which layer of the OSI model defines services to segment and reassemble data for individual communications between end devices?

transport

Which OSI layer sends segments to be encapsulated in an IPv4 or IPv6 packet?

transport layer

Which procedure is used to reduce the effect of crosstalk in copper cables?

twisting opposing circuit wire pairs together

A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?

user EXEC mode

Which IOS mode are you in if the Switch> prompt is displayed?

user EXEC mode

Which media uses patterns of microwaves to represent bits?

wireless

What are two functions of end devices on a network? (Choose two.) *They are the interface between humans and the communication network *They direct data over alternate paths in the event of link failures. *They provide the channel over which the network message travels. *They filter the flow of data to enhance security. *They originate the data that flows through the network.

*They are the interface between humans and the communication network *They originate the data that flows through the network.

When data is encoded as pulses of light, which media is being used to transmit the data?

Fiber-optic Cable

An administrator has just changed the IP address of an interface on an IOS device. What else must be done in order to apply those changes to the device?

Nothing must be done. Changes to the configuration on an IOS device take effect as soon as the command is typed correctly and the Enter key has been pressed.

Which IOS mode allows access to all commands and features?

Privileged EXEC mode

Which memory location on a Cisco router or switch will lose all content when the device is restarted?

RAM

What is the PDU associated with the transport layer?

segment

Which command encrypts all plaintext passwords access on a switch?

service password-encryption

What is the process of converting information into the proper form for transmission?

Encoding

What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?

scalability

Which of the following are protocols that provide feedback from the destination host to the source host regarding errors in packet delivery? (Choose two.) *IPv4 *TCP *ICMPv4 IPv6 *UDP *ICMPv6

*ICMPv4 *ICMPv6

Which services are provided by the internet layer of the TCP/IP protocol suite? (Choose three.) *File Transfer *Address Resolution *Routing Protocols *Messaging *Ethernet *Internet Protocol

*Routing Protocols *Messaging *Internet Protocol

Which feature describes using personal tools to access information and communicate across a business or campus network?

BYOD

How does BYOD change the way in which businesses implement networks?

BYOD provides flexibility in where and how users can access network resources

A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?

Bring Your own Device (BYOD)

Which access method would be most appropriate if your manager gave you a special cable and told you to use it to configure the switch?

Console

True or false? The right-most part of an IP address is used to identify the network that a device belongs to.

False

This standards organization is responsible for IP address allocation and domain name management.

Internet Assigned Numbers Authority (IANA)

Which network infrastructure provides access to users and end devices in a small geographical area, which is typically a network in a department in an enterprise, a home, or small business?

LAN

Which feature is a good conferencing tool to use with others who are located elsewhere in your city, or even in another country?

Video Communications

Having multiple paths to a destination is known as redundancy. This is an example of which characteristic of network architecture?

fault tolerance

Which statement is true about the running configuration file in a Cisco IOS device?

it affects the operation of the device immediately when modified

Which two statements are true regarding the user EXEC mode? (Choose two.) *The device prompt for this mode ends with the ">" symbol. *Global configuration mode can be accessed by entering the enable command. *Only some aspects of the router configuration can be viewed. *All router commands are available *Interfaces and routing protocols can be configured.

*The device prompt for this mode ends with the ">" symbol. *Only some aspects of the router configuration can be viewed.

Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two.) *selecting the best command to accomplish a task *displaying a list of all available commands within the current mode *determining which option, keyword, or argument is available for the entered command. *allowing the user to complete the remainder of an abbreviated command with the TAB key *providing an error message when a wrong command is submitted.

*displaying a list of all available commands within the current mode *determining which option, keyword, or argument is available for the entered command.

A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber optic cable that connects two of the existing dormitories to the campus data center. Although the cable has been cut, students in the dormitories only experience a very short interruption of network services. What characteristic of the network is shown here?

fault tolerance

UDP and TCP belong to which layer of the TCP/IP protocol?

transport

Which attack slows down or crashes equipment and programs?

Denial of Service (DoS)

What are two characteristics of a scalable network? (Choose two.) *is not as reliable as a small network *grows in size without impacting existing users *suitable for modular devices that allow for expansion *easily overloaded with increased traffic *offers limited number of applications

*grows in size without impacting existing customers *suitable for modular devices that allow for expansion

True or False? Data Link addresses are physical so they never change in the data link frame from source to destination.

False

Which option describes a network attack that occurs on the first day that a vulnerability becomes known?

Zero-day or Zero-hour