CCNA 1

A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?

HTTP

What does the term "attenuation" mean in data communication?

loss of signal strength as distance increases

What three requirements are defined by the protocols used in network communications to allow message transmission across a network?

message size message encoding delivery options

A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?

nslookup

A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information?

ping ipconfig nslookup

Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication?

places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame implements trailer with frame check sequence for error detection

What is a function of the data link layer?

provides for the exchange of frames over a common local media

A disgruntled employee is using some free wireless networking tools to determine information about the enterprise wireless networks. This person is planning on using this information to hack the wireless network. What type of attack is this?

reconnaissance

Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?

remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0

An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees.What three network characteristics are described in this scenario?

security quality of service fault tolerance

What characteristic describes adware?

software that is installed on a user device and collects information about the user

When a switch configuration includes a user-defined error threshold on a per-port basis, to which switching method will the switch revert when the error threshold is reached?

store-and-forward

During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?

switch the packet to the directly connected interface

Which subnet would include the address 192.168.1.96 as a usable host address?

192.168.1.64/26

A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.0

A network administrator is adding a new LAN to a branch office. The new LAN must support 90 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.128

Refer to the exhibit. A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?

255.255.255.128

The network administrator has deemed that 192.168.10.0/24 is to be the network used at this site. Which single subnet mask would make the most efficient use of the available addresses to use for the four subnetworks?

255.255.255.224

A network administrator is adding a new LAN to a branch office. The new LAN must support 10 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.240

What single subnet mask would be appropriate to use for the three subnetworks?

255.255.255.240

. A network administrator is adding a new LAN to a branch office. The new LAN must support 4 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.248

An organization is assigned an IPv6 address block of 2001:db8:0:ca00::/56. How many subnets can be created without using bits in the interface ID space?

256

What service is provided by HTTP?

A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.

What are three characteristics of the CSMA/CD process?

A device listens and waits until the media is not busy before transmitting. After detecting a collision, hosts can attempt to resume transmission after a random time delay has expired. All of the devices on a segment see data that passes on the network medium.

Which scenario describes a function provided by the transport layer?

A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

Which three layers of the OSI model map to the application layer of the TCP/IP model?

Application session Presentation

A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?

Authorization

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

CSMA/CA

Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer?

Capture traffic during peak utilization times to get a good representation of the different traffic types. Perform the capture on different network segments.

What happens when the transport input ssh command is entered on the switch vty lines?

Communication between the switch and remote users is encrypted.

An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections?

Configure the IP domain name on the router. Generate the SSH keys. Enable inbound vty SSH sessions.

A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?

DHCP

Which type of server relies on record types such as A, NS, AAAA, and MX in order to provide services?

DNS

Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved?

Destination IP addresses in a packet header remain constant along the entire path to a target host. Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another.

Which two statements describe features of an IPv4 routing table on a router?

Directly connected interfaces will have two route source codes in the routing table: C and S. Directly connected interfaces will have two route source codes in the routing table: C and S.

A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?

Exit privileged EXEC mode and press Enter .

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

FE80::/10

A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?

FTP

A network technician is researching the use of fiber optic cabling in a new technology center. Which two issues should be considered before implementing fiber optic media?

Fiber optic cabling requires different termination and splicing expertise from what copper cabling requires. Fiber optic provides higher data capacity but is more expensive than copper cabling

Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?

Frame check sequence field

A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?

IMAP

Refer to the exhibit. The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?

IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33

What two pieces of information are displayed in the output of the show ip interface brief command?

IP addresses Layer 1 statuses

What are two features of ARP?

If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast. If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

Which layer of the TCP/IP model provides a route to forward messages through an internetwork?

Internet

What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?

It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.

What is an advantage to using a protocol that is defined by an open standard?

It encourages competition and promotes choices.

How does the service password-encryption command enhance password security on Cisco routers and switches?

It encrypts passwords that are stored in router or switch configuration files.

A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?

It must send an ICMPv6 Neighbor Solicitation message to ensure that the address is not already in use on the network.

What is one main characteristic of the data link layer?

It shields the upper layer protocol from being aware of the physical medium to be used in the communication.

What service is provided by BOOTP?

Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.

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

MAC address

What are the two most effective ways to defend against malware?

Update the operating system and other application software. Install and update antivirus software.

What is an advantage for small organizations of adopting IMAP instead of POP?

Messages are kept in the mail servers until they are manually deleted from the email client.

What are two ICMPv6 messages that are not present in ICMP for IPv4?

Neighbor Solicitation Router Advertisement

What two ICMPv6 message types must be permitted through IPv6 access control lists to allow resolution of Layer 3 addresses to Layer 2 MAC addresses?

Neighbor solicitation neighbor advertisement

What is a benefit of using cloud computing in networking?

Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.

Which two protocols operate at the top layer of the TCP/IP protocol suite?

POP DNS

What are two characteristics shared by TCP and UDP?

Port numbering use of checksum

What service is provided by POP3?

Retrieves email from the server by downloading the email to the local mail application of the client.

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

Route print netstat -r

A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?

SSH

What are the three parts of an IPv6 global unicast address?

Subnet ID global routing prefix interface ID

A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?

TFTP

Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?

TIme to live

What are two problems that can be caused by a large number of ARP request and reply messages?

The ARP request is sent as a broadcast, and will flood the entire subnet. All ARP request messages must be processed by all nodes on the local network.

What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?​

The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.

Which two statements are correct in a comparison of IPv4 and IPv6 packet headers?

The Source Address field name from IPv4 is kept in IPv6. The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.

Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?

The administrator must first enter privileged EXEC mode before issuing the command.

What will happen if the default gateway address is incorrectly configured on a host?

The host cannot communicate with hosts in other networks.

Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation?

The source port field identifies the running application or service that will handle data returning to the PC. UDP segments are encapsulated within IP packets for transport across the network. The UDP destination port number identifies the application or service on the server which will handle the data.

The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?

The switch can be remotely managed from a host on another network.

Refer to the exhibit. What is wrong with the displayed termination?

The untwisted length of each wire is too long.

Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct?

There are 4 hops between this device and the device at 192.168.100.1. There is connectivity between this device and the device at 192.168.100.1.

Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?

Trojan horse

Which two traffic types use the Real-Time Transport Protocol (RTP)?

Video Voice

Which wireless technology has low-power and data rate requirements making it popular in home automation applications?

ZigBee

What characteristic describes a VPN?

a tunneling protocol that provides remote users with secure access into the network of an organization

What are two primary responsibilities of the Ethernet MAC sublayer?

accessing the media data encapsulation

An IPv6 enabled device sends a data packet with the destination address of FF02::2. What is the target of this packet?​

all IPv6 configured routers on the local link​

What characteristic describes antispyware?

applications that protect end devices from becoming infected with malicious software

What characteristic describes antivirus software?

applications that protect end devices from becoming infected with malicious software

What are three commonly followed standards for constructing and installing cabling?

cable lengths pinouts connector types

What are two functions that are provided by the network layer?

directing data packets to destination hosts on other networks providing end devices with a unique network identifier

What are two characteristics of IP?

does not require a dedicated end-to-end connection operates independently of the network media

Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication?

enables IPv4 and IPv6 to utilize the same physical medium places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame

What are two common causes of signal degradation when using UTP cabling?

improper termination low-quality cable or connectors

A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network?

interference security coverage area

A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?

the MAC address of the default gateway

Users are reporting longer delays in authentication and in accessing network resources during certain time periods of the week. What kind of information should network engineers check to find out if this situation is part of a normal network behavior?

the network performance baseline

What characteristic describes identity theft?

the use of stolen credentials to access private data

Why would a Layer 2 switch need an IP address?

to enable the switch to be managed remotely

What is the purpose of the TCP sliding window?

to request that a source decrease the rate at which it transmits data

A user is complaining that an external web page is taking longer than normal to load.The web page does eventually load on the user machine. Which tool should the technician use with administrator privileges in order to locate where the issue is in the network?

tracert

What technique is used with UTP cable to help protect against signal interference from crosstalk?

twisting the wires together into pairs

What two security solutions are most likely to be used only in a corporate environment?

virtual private networks intrusion prevention systems

A user is executing a tracert to a remote device. At what point would a router, which is in the path to the destination device, stop forwarding the packet?

when the value in the TTL field reaches zero

Users report that the network access is slow. After questioning the employees, the network administrator learned that one employee downloaded a third-party scanning program for the printer. What type of malware might be introduced that causes slow performance of the network?

worm