Address Resolution Protocol Transcript

Question 1

What does ARP stand for?

Answer 1

Address Resolution Protocol

Question 2

What is the purpose of ARP?

Answer 2

To dynamically discover MAC addresses of systems on a network.

Question 3

How long is an IP address in bytes?

Answer 3

4 bytes

Question 4

At which network layer does IP operate?

Answer 4

Layer 3 (network layer)

Question 5

How many bytes is a MAC address?

Answer 5

6 bytes

Question 6

In what format are MAC addresses expressed?

Answer 6

In hexadecimal notation

Question 7

What does ARP use to discover MAC addresses?

Answer 7

ARP sends out broadcast frames

Question 8

What is the destination MAC address in a broadcast frame?

Answer 8

All binary 1s

Question 9

What happens when a station receives an ARP request?

Answer 9

It responds with an ARP reply as a unicast.

Question 10

How does a station remember MAC addresses for future use?

Answer 10

By storing entries in the ARP table

Question 11

How long do entries typically stay in the ARP table on Windows PCs?

Answer 11

A few minutes

Question 12

What is the purpose of the ARP table?

Answer 12

To allow a system to build frames targeting remote MAC addresses.

Question 13

How does ARP help in sending packets to systems on the same network?

Answer 13

By dynamically discovering the MAC addresses of the target systems.

Question 14

What type of request does ARP send out when the MAC address is unknown?

Answer 14

ARP sends out a broadcast request for the MAC address information.

Question 15

Describe the relationship between IP addresses and MAC addresses in ARP.

Answer 15

ARP discovers the MAC address corresponding to an IP address for encapsulation.

Question 16

How do ARP requests and replies differ in terms of broadcasting?

Answer 16

ARP requests go out as broadcasts, while replies come back as unicasts.