Networking Basics Course Final Exam

Question 1

Which items are collectively referred to as network media?

Answer 1

wires and radio waves

Question 2

What are two types of wired high-speed Internet connections? (Choose two.)

Answer 2

DSL & cable

Question 3

Which technology is used to uniquely identify a WLAN network?

Answer 3

SSID

Question 4

Which feature is characteristic of MAC filtering in wireless networks?

Answer 4

It restricts computer access to a wireless network.

Question 5

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

Answer 5

application
presentation
session

Question 6

Which type of network cable is commonly used in backbone networks and telephone companies?

Answer 6

fiber-optic cable

Question 7

How much data can be encapsulated into a normal sized Ethernet frame before it is sent over the network?

Answer 7

46 to 1500 bytes

Question 8

What are two actions performed by a Cisco switch?

Answer 8

utilizing the MAC address table to forward frames via the destination MAC address
&
using the source MAC addresses of frames to build and maintain a MAC address table

Question 9

Which type of address does a switch use to build the MAC address table?

Answer 9

source MAC address

Question 10

Which information does a switch use to populate the MAC address table?

Answer 10

the source MAC address and the incoming port

Question 11

When IPv4 is configured for a computer on a network, what does the subnet mask identify?

Answer 11

the part of the IP address that identifies the network

Question 12

What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)

Answer 12

10.0.0.0/8, 192.168.0.0/16, & 172.16.0.0/12

Question 13

A student is helping a friend with a home computer that can no longer access the Internet. Upon investigation, the student discovers that the computer has been assigned the IP address 169.254.100.88. What could cause a computer to get such an IP address?

Answer 13

unreachable DHCP server

Question 14

Which shortened address is an accurate representation of the IPv6 address 2001:0db8:0000:0000:ab00:0000:0000:0000?

Answer 14

2001:db8:0:0:ab00::

Question 15

What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?

Answer 15

2001:DB8:0:AB00::1234

Question 16

Which DHCPv4 message will a client send to accept an IPv4 address that is offered by a DHCP server?

Answer 16

broadcast DHCPREQUEST

Question 17

Which statement is true about DHCP operation?

Answer 17

When a device that is configured to use DHCP boots, the client broadcasts a DHCPDISCOVER message to identify any available DHCP servers on the network.​

Question 18

How many bits make up an IPv4 address?

Answer 18

32

Question 19

What is the host number of the IP address?

Answer 19

IPv4 Address very end number. EX 10.10.10.(2)

Question 20

When a LAN is connected to the internet using a wireless router, how do devices on the LAN communicate on the internet using NAT?

Answer 20

All devices must share the single public IPv4 address assigned to the wireless router in order to communicate to the internet via NAT.

Question 21

A network administrator investigates a user problem. The user can reach hosts on the same network, but is unable to communicate to remote networks.The network administrator tries to ping the gateway address configured on the host device and is unsuccessful. What is the most likely cause of the problem?

Answer 21

The default gateway address is incorrect.

Question 22

Workstation A sends an IP packet to workstation B. Which two statements describe the encapsulation of the packet as it passes through the network?

Answer 22

The Layer 2 header is stripped from the frame when it is received by each router.
The source Layer 3 address is changed when it is received at each router.

Question 23

Which portion of the network layer address does a router use to forward packets?

Answer 23

network portion

Question 24

Which type of address can be shared through NAT to enable home network devices to send and receive data over the internet?

Answer 24

registered public IP address

Question 25

A home network is using NAT on the router connecting it to the internet. The PCs on the home network receive private IP addresses through DHCP. When a PC sends a packet to a web server on the internet, what is the source IP address in the packet header when it arrives at the web server?

Answer 25

a registered public IP address assigned to the external router interface

Question 26

What action does the ARP process take when a host needs to build a frame, but the ARP cache does not contain an address mapping?

Answer 26

The ARP process sends out an ARP request to the Ethernet broadcast address to discover the MAC address of the destination device.

Question 27

What is the purpose of ARP in an IPv4 network?

Answer 27

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

Question 28

A host needs to reach another host on a remote network, but the ARP cache has no mapping entries. To what destination address will the host send an ARP request?

Answer 28

the broadcast MAC address

Question 29

Which portion of the network layer address does a router use to forward packets?

Answer 29

network portion

Question 30

Why is it important for the router to maintain an accurate routing table?

Answer 30

to determine the best path to reach the destination network

Question 31

What are two functions of a router?

Answer 31

A router connects multiple IP networks.
It determines the best path to send packets.

Question 32

Consider the IP address configuration shown from PC1. What is a description of the default gateway address?

Answer 32

It is the IP address of the Router1 interface that connects the PC1 LAN to Router1.

Question 33

Which two functions are primary functions of a router?

Answer 33

packet forwarding
path selection