CCNA Final Exam - 3

part 3/3

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

IMAP

What are two characteristics shared by TCP and UDP? (Choose two.)

port numbering, use of checksum

Refer to the exhibit. Which two network addresses can be assigned to the network containing 10 hosts? Your answers should waste the fewest addresses, not reuse addresses that are already assigned, and stay within the 10.18.10.0/24 range of addresses. (Choose two.)

• 10.18.10.208/28

• 10.18.10.224/28

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

FTP

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

MAC address

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

twisting the wires together into pairs

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

Refer to the exhibit. The switches are in their default configuration. Host A needs to communicate with host D, but host A does not have the MAC address for its default gateway. Which network hosts will receive the ARP request sent by host A?

only hosts B, C, and router R1

Refer to the exhibit. A network engineer has been given the network address of 192.168.99.0 and a subnet mask of 255.255.255.192 to subnet across the four networks shown. How many total host addresses are unused across all four subnets?

200

Which connector is used with twisted-pair cabling in an Ethernet LAN?

RJ 45

A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?

SShH

What characteristic describes an IPS?

a network device that filters access and traffic coming into a network

What service is provided by DHCP?

Dynamically assigns IP addresses to end and intermediary devices.

Match the header field with the appropriate layer of the OSI model. (Not all options are used.)

Layer 2	Layer 3	Layer 4
802.2 header	source IP address	destination port number
FCS (frame check sequence)	TTL	Acknowledgement number
destination MAC address

Which wireless technology has low-power and low-data rate requirements making it popular in IoT environments?

Zigbee

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? (Choose two.)

neighbor solicitations, neighbor advertisments

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.

Two pings were issued from a host on a local network. The first ping was issued to the IP address of the default gateway of the host and it failed. The second ping was issued to the IP address of a host outside the local network and it was successful. What is a possible cause for the failed ping?

Security rules are applied to the default gateway device, preventing it from processing ping requests.

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 subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?

255.255.255.192

Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?

BB:BB:BB:BB:BB:BB

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 statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)

• 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.

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 are three characteristics of the CSMA/CD process? (Choose three.)

• 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 information does the show startup-config command display?

the contents of the saved configuration file in the NVRAM

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

• route print

• netstat -r

What are two functions that are provided by the network layer? (Choose two.)

• directing data packets to destination hosts on other networks

• providing end devices with a unique network identifier

Which two statements describe features of an IPv4 routing table on a router? (Choose two.)​

• It stores information about routes derived from the active router interfaces.

• If a default static route is configured in the router, an entry will be included in the routing table with source code S .

• The routing table stores information about routes derived from the active router interfaces.

What characteristic describes a VPN?

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

Why would a Layer 2 switch need an IP address?

to enable the switch to be managed remotely

Match each description to its corresponding term. (Not all options are used.)

message encapsulation	the process of placing one message format inside another message format
message sizing	the process of breaking up a long message into individual pieces before being sent over the network
message encoding	the process of converting information from one format into another acceptable for transmission

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

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

it encourages competition and promotes choices

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? (Choose three.)

• 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.

Match each description with the corresponding TCP mechanism. (Not all options are used.)

number of bytes a destination device can accept and process at one time	window size
used to identify missing segments of data	sequence numbers
method of managing segments of data loss	retransmission
received by a sender before transmitting more segments in a session	acknowledgment

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

A network administrator wants to have the same subnet mask for three subnetworks at a small site. The site has the following networks and numbers of devices:

Subnetwork A: IP phones - 10 addresses

Subnetwork B: PCs - 8 addresses

Subnetwork C: Printers - 2 addresses

255.255.255.240

Match each item to the type of topology diagram on which it is typically identified. (Not all options are used.)

physical topology diagram	logical topology diagram
location of a desktop PC in a classroom	IP address of a server
path of cables that connect rooms to wiring closets

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

• IP addresses

• Layer 1 statuses

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

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

Time-to-Live

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? (Choose two.)

• 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.

Match each description with an appropriate IP address. (Not all options are used.)

an experimental address	240.2.6.255
a link-local address	169.254.1.5
a public address	198.133.219.2
a loopback address	127.0.0.1

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