Cisco 4-7
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?
10101100.00010000.00011111.000111110
What is the binary representation for the decimal number 173?
10101101
How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
1022
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 statement describes a characteristic of the frame header fields of the data link layer?
They vary depending on protocols
What is used in the EUI-64 process to create an IPv6 interface ID on an IPv6 enabled interface?
the MAC address of the IPv6 enabled interface
What is the auto-MDIX feature on a switch?
the automatic configuration of an interface for a straight-through or a crossover Ethernet cable connection
Which ICMPv6 message is sent when the IPv6 hop limit field of a packet is decremented to zero and the packet cannot be forwarded?
time exceeded
What is the purpose of the FCS field in a frame?
to determine if errors occurred in the transmission and reception
What is the purpose of ICMP messages?
to provide feedback of IP packet transmissions
What are two actions performed by a Cisco switch? (Choose two.)
using the source MAC addresses of frames to build and maintain a MAC address table utilizing the MAC address table to forward frames via the destination MAC address
A user executes a traceroute over IPv6. At what point would a router in the path to the destination device drop the packet?
when the value of the Hop Limit field reaches zero
What is auto-MDIX?
A feature that detects Ethernet cable type
What Layer 2 function does a router perform? (Choose three.)
Accepts a frame from a medium, de-encapsulates the frame, and re-encapsulates the packet into a new frame
What type of communication rule would best describe CSMA/CD?
Access method
What OSI physical layer term describes the physical medium for microwave transmissions?
Air
Which statement is true about the CSMA/CD access method that is used in Ethernet?
All network devices must listen before transmitting
What type of address is 01-00-5E-0A-00-02?
An address that reaches a specific group of hosts
What feature automatically negotiates the best speed and duplex setting between interconnecting devices?
Autonegotiation
What OSI physical layer term describes the capacity at which a medium can carry data?
Bandwidth
Which of these is the name for the capacity of a medium to carry data?
Bandwidth
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
When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?
CRC in the trailer
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?
CSMA/CD
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
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
Which media uses electrical pulses to represent bits?
Copper
What OSI physical layer term describes the physical medium which uses electrical pulses?
Copper cable
Match the situation with the appropriate use of network media.
Copper cables- horizontal cabling structure & desktop PCs in an enterprise office Fiber Optic- backbone cabling in an enterprise & long-haul networks Wireless- guest access in a coffee shop & waiting rooms in a hospital
Which two devices commonly affect wireless networks? (Choose two.)
Cordless phones & microwaves
What is a primary role of the Physical layer in transmitting data on the network?
Create the signals that represent the bits in each frame on to the media
In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.)
Crosstalk & Electromagnetic interface
Which switching method can be implemented using fast-forward switching or fragment-free switching?
Cut-through switching
What are two methods for switching data between ports on a switch? (Choose two.)
Cut-through switching Store-and-forward switching
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 layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
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 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
What does a router do after de-encapsulating a received frame?
Determines the best path
Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?
Dotted decimal
Which two functions are performed at the LLC sublayer of the OSI data link layer? (Choose two.)
Enables IPv4 and IPv6 to utilize the same network interface and media. Places information in the frame that identifies which network layer protocol is being used for the frame.
Which statement describes an extended star topology?
End devices connect to a central intermediate device, which in turn connects to other central intermediate devices
What is contained in the trailer of a data-link frame?
Error detection
Which part of an Ethernet Frame describes the higher-layer protocol that is encapsulated?
EtherType
What are three ways that media access control is used in networking? (Choose three.)
Ethernet utilizes CSMA/CD Media access control provides placement of data frames onto the media. Data link layer protocols define the rules for access to different media.
Which LAN topology is a hybrid topology?
Extended star
Which is the hexadecimal equivalent of 254?
FE
Which address is a valid IPv6 link-local unicast address?
FE80::1:4545:6578:ABC1
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.Which port does Switch0 use to send frames to the host with the IPv4 address 10.1.1.5?
Fa0/11
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 switching method has the lowest level of latency?
Fast-forward
What are two examples of the cut-through switching method? (Choose two.)
Fast-forward switching and fragment-free switching
Signal cable with twist thing
Fiber
Which media uses patterns of light to represent bits?
Fiber-optic
What OSI physical layer term describes the physical medium that uses the propagation of light?
Fiber-optic cable
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
Which two fields or features does Ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC? (Choose two.)
Frame Check Sequence & minimum frame size
Which advantage does the store-and-forward switching method have compared with the cut-through switching method?
Frame error checking
Which media communication type does not require media arbitration in the data link layer?
Full-duplex
What OSI physical layer term describes the measure of usable data transferred over a given period of time?
Goodput
Which duplex communication method is used in WLANs?
Half-duplex
Which three basic parts are common to all frame types supported by the data link layer? (Choose three.)
Header, data, trailer
What does the data link layer add to a Layer 3 packet to create a frame? (Choose two.)
Header/trailer
Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host?
ICMPv6
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
Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)
IPv6 addresses are represented by hexadecimal numbers & IPv4 addresses are 32 bits in length
What is the definition of bandwidth?
The amount of data that can flow from one place to another in a given amount of time
A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
The amount of traffic that is currently crossing the network The type of traffic that is crossing the network The latency that is created by the number of network devices that the data is crossing
Which characteristic describes crosstalk?
The distortion of the transmitted messages from signals carried in adjacent wires
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 connection 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
What action will occur if a host receives a frame with a destination MAC address it does not recognize?
The host will discard the frame.
What action will occur if a host receives a frame with a destination MAC address of FF:FF:FF:FF:FF:FF?
The host will process the frame.
A high school in New York (school A) is using videoconferencing technology to establish student interactions with another high school (school B) in Russia. The videoconferencing is conducted between two end devices through the Internet. The network administrator of school A configures the end device with the IP address 209.165.201.10. The administrator sends a request for the IP address for the end device in school B and the response is 192.168.25.10. Neither school is using a VPN. The administrator knows immediately that this IP will not work. Why?
This is a private IP address.
What OSI physical layer term describes the measure of the transfer of bits across a medium over a given period of time?
Throughput
Which of these is a measure of the transfer of bits across the media?
Throughput
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 function of the CRC value that is found in the FCS field of a frame?
To verify the integrity of the received frame
What is the purpose of the OSI physical layer?
Transmitting bits across the local media
Which procedure is used to reduce the effect of crosstalk in copper cables?
Twisting opposing circuit wire pairs together
4 wires twisted
UTP
Which of the following is the most common network media?
UTP
What kind of network would use point-to-point, hub and spoke, or mesh topologies?
WAN
An administrator wants to create four subnetworks from the network address 192.168.1.0/24. What is the network address and subnet mask of the second useable subnet?
subnetwork 192.168.1.64 subnet mask 255.255.255.
What source IP address does a router use by default when the traceroute command is issued?
the IP address of the outbound interface
What does the term "attenuation" mean in data communication?
loss of signal strength as distance increases
Which three addresses are valid public addresses? (Choose three.)
198.133.219.17 128.107.12.117 64.104.78.227
What is the prefix length notation for the subnet mask 255.255.255.224?
/27
What is the special value assigned to the first 24 bits of a multicast MAC address?
01-00-5E
Which is a multicast MAC address?
01-00-5E-00-00-03
Which of the following is the decimal equivalent of 7D?
125
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 three blocks of addresses are defined by RFC 1918 for private network use? (Choose three.)
172.16.0/12 192.168.0.0/16 10.0.0.0/8
A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that? (Choose two.)
192.168.1.96/28 192.168.1.64/27
Given IPv6 address prefix 2001:db8::/48, what will be the last subnet that is created if the subnet prefix is changed to /52?
2001:db8:0:f000::/52
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
Which address prefix range is reserved for IPv4 multicast?
224.0.0.0 - 239.255.255.255
Given the binary address of 11101100 00010001 00001100 00001010, which address does this represent in dotted decimal format?
236.17.12.10
A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?
255.255.255.128
How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?
3
How many bits are in an IPv4 address?
32
Which of these addresses is the shortest abbreviation for the IP address:3FFE:1044:0000:0000:00AB:0000:0000:0057?
3FFE:1044:0:0:AB::57
Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000:: ... 2001:0DB8:BC15:00AF:0000:: The prefix-length for the range of addresses is
60
How many host addresses are available on the 192.168.10.128/26 network?
62
What is the usable number of host IP addresses on a network that has a /26 mask?
62
What is the decimal equivalent of the hex number 0x3F?
63
What are the two sizes (minimum and maximum) of an Ethernet frame? (Choose two.)
64 and 1518 bytes
A network administrator has received the IPv6 prefix 2001:DB8::/48 for subnetting. Assuming the administrator does not subnet into the interface ID portion of the address space, how many subnets can the administrator create from the /48 prefix?
65536
Which of the following are data link layer protocols? (Choose three)
802.11 Ethernet PPP
Which two functions are performed at the MAC sublayer of the OSI data link layer? (Choose two.)
Implements a trailer to detect transmission errors. Controls the NIC responsible for sending and receiving data on the physical medium.
Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)
International Organization for Standardization (ISO) International Telecommunication Union (ITU)
What are two services performed by the data link layer of the OSI model? (Choose two.)
It accepts Layer 3 packets and encapsulates them into frames It provides media access control and performs error detection
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 is the auto-MDIX feature?
It enables a device to automatically configure an interface to use a straight-through or a crossover cable.
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 are two characteristics of fiber-optic cable? (Choose two.)
It is not affected by EMI or RFI It is more expensive than UTP cabling is
Which two functions or operations are performed by the MAC sublayer? (Choose two.)
It is responsible for Media Access Control It adds a header and trailer to form an OSI Layer 2 PDU
Which two characteristics describe Ethernet technology? (Choose two.)
It is supported by IEEE 802.3 standards It uses the CSMA/CD access control method
Which two statements describe the services provided by the data link layer? (Choose two.)
It manages the access of frames to the network media It packages various Layer 3 PDUs into a frame format that is compatible with the network interface
What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
What will a host on an Ethernet network do if it receives a frame with a 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 are the two sublayers of the OSI model data link layer? (Choose two.)
LLC and MAC
What OSI physical layer term describes the amount of time, including delays, for data to travel from one point to another?
Latency
What is another name for the OSI data link layer?
Layer 2
The IEEE 802 LAN/MAN data link layer consists of which two sublayers? (Choose two.)
Logical Link Control & Media Access Control
Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)
Logical link control is implemented in software. The data link layer uses LLC to communicate with the upper layers of the protocol suite.
What is true concerning physical and logical topologies?
Logical topologies refer to how a network transfers data between devices
Which topology displays networking device layer IP addresses?
Logical topology
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
The media access control method used depends on which two criteria?
Media sharing and topology
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
What OSI physical layer term describes the process by which one wave modifies another wave?
Modulation
Which of the following fiber-optic cable types can help data travel approximately 1.24 miles or 2 km/2000m?
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
A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?
Partial mesh
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
Which two types of memory buffering techniques are used by switches? (Choose two.)
Port-based memory buffering Shared memory buffering
Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?
Preamble
What is the responsibility of the MAC sublayer?
Provides the method to get the frame on and off the media
What type of cable is used to connect a workstation serial port to a Cisco router console port?
Rollover
Which of the following counters EMI and RFI by using shielding techniques and special connectors?
STP
A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?
Shared memory buffering
Which of the following fiber-optic cable types can travel approximately 62.5 miles or 100 km/100000 m?
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 three items are contained in an Ethernet header and trailer? (Choose three.)
Source MAC address, destination MAC address, and error-checking information
What type of physical topology can be created by connecting all Ethernet cables to a central device?
Star
Which switching method uses the CRC value in a frame?
Store-and-forward
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
Store-and-forward switching
Which type of UTP cable is used to connect a PC to a switch port?
Straight-through
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
A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection? (Choose three.)
The link between the switches will work at the fastest speed that is supported by both switches. The link between switches will work as full-duplex. The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable.
With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
The magnetic field around the adjacent pairs of wire
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 are two possible causes of the signal distortion? (Choose two.)
The microwave oven & the cellular phones that are used by the employees
What statement describes a characteristic of MAC addresses?
The must be globally unique
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The physical address is added
What addressing information is recorded by a switch to build its MAC address table?
The source Layer 2 address of incoming frames
What action will occur if a switch receives a frame with the destination MAC address 01:00:5E:00:00:D9?
The switch forwards it out all ports except the ingress port.
What action will occur if a switch receives a frame with the destination MAC address FF:FF:FF:FF:FF:FF?
The switch forwards it out all ports except the ingress port.
What action will occur if a switch receives a frame and does have the source MAC address in the MAC table?
The switch refreshes the timer on that entry.
Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?
The use of full-duplex capable Layer 2 switches
Why are two strands of fiber used for a single fiber optic connection?
They allow for full-duplex connectivity
Which media uses patterns of microwaves to represent bits?
Wireless
Which of the following wireless standards is best suited for industrial and IoT environments?
Zigbee
A host is transmitting a multicast. Which host or hosts will receive it?
a specially defined group of hosts
A user issues a ping fe80:65ab:dcc1::100 command and receives a response that includes a code of 3. What does this code represent?
address unreachable
An IPv6 enabled device sends a data packet with the destination address of FF02::1. What is the target of this packet?
all IPv6 enabled devices on the local link or network
Which type of IPv6 address refers to any unicast address that is assigned to multiple hosts?
anycast
What type of IPv6 address is FE80::1?
link-local
A message is sent to all hosts on a remote network. Which type of message is it?
directed broadcast
Which is a valid hexadecimal number?
f
Which is the compressed format of the IPv6 address fe80:09ea:0000:2200:0000:0000:0fe0:0290?
fe80:9ea:0:2200::fe0:290
Which is the compressed format of the IPv6 address fe80:0000:0000:0000:0220:0b3f:f0e0:0029?
fe80::220:b3f:f0e0:29
What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)
greater distances per cable run limited susceptibility to EMI/RFI greater bandwidth potential
What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?
has a lower latency appropriate for high-performance computing applications