Question

5a. What are the advantages and disadvantages of Proxy ARP?

b. What is the TTL field of the IP datagram header and why is it important?

Answer 1

5a. What are the advantages and disadvantages of Proxy ARP?

Ans: The advantage of proxy ARP:

Proxy ARP can be added to a single router.

Sometimes there is a situation where IP Hosts are not configured with a default gateway so proxy ARP can be useful there.

The disadvantage of proxy ARP:

ARP resolution is a must for every device which is routed in ARP manner.

In Proxy ARP no fallback mechanism is present.

Masquerading is difficult in some ways using proxy ARP.

Proxy ARP increases a huge amount of ARP traffic.

b. What is the TTL field of the IP datagram header and why is it important?

Ans:

The TTL field is 8 bits long and measured in seconds. Used to specify time for which datagram must be available on a network. It helps to maintain the performance of a network by controlling a packet on a network, TTL value is never like fix it must be set according to types of service want.

The TTL field is important because it helps to improve the performance of a network. It also helps to have control over a datagram packet