8 Explain the compressed format for writing IPv6 addresses. Write the following

Question

8 Explain the compressed format for writing IPv6 addresses. Write the following IPv6 addresses in their shortest compressed form: (a) 2001:0EB8:0000:1470:0000:0000:0000:0200 (3 marks) (3 marks) (3 marks) (b) F380:0000:0000:0000:0123:4567:89AB:CAEF 09 The two main functions of an Internet Protocol router are the forwarding of individual packets (a) How and when are other routers involved in the internal forwarding decisions and actions of a are rsiching) nd themc ("switching") and the maintenance of routing tables ("routing") router when it processes an individual packet (switching)? (4 marks) (b) Explain the behaviour of the class of routing protocols described as distance vector protocols (4 marks)

Explanation / Answer

Answer 8:

There are few steps to follow for compressing IPV6 address:

1. Drop leading Zeros

Like in IPv6 address we observe it like 9A71:0000: AB27 : 0000 : 71AB

We drop zeros as : 9A71:0 : AB27: 0 : 71AB

For writing 4 zeros we write only one zero as compressed form

2. Compress Consective hexadecimal fields

We use double colon :: for it

example : 2AB4 : 0000 : 0000 : 0001

We will write it as 2AB4 ::0001 as compressed form

a. 2001 : 0EB8 : 0000 : 1470 : 0000 : 0000 : 0000 : 0200

First we drop zero 0000 as 0

Then consective hexadecimal as :: colon

So compressed form is 2001 : 0 : 1470 ::0200

b. F380:0000:0000:0000:0123:4567:89AB:CAEF

In this IPv6 address there is consective hexadecimal as 0000

We will drop zeros and write :: in place of three same octets as :

F380::0123:3456:89AB:CAEF

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