We know that IPv4 addresses are mostly represented in a dotted decimal form like 192.168.10.1, and if written with a prefix mask then it would be written like 192.168.10.1/24, where /24 is the network mask.
But IPv6 is long addressing format. IPv6 is 128 bit long and usually represented in hexadecimal format of addressing. IPv6 representation includes 8 sets of four hex digits separated by a colon(:).
Mostly each set of four digits is termed as “Quartet”, however the term Quartet is not official.
IPv6 addresses are represented in two forms:
- Unabbreviated –
- Abbreviated –
Rules to Abbreviate an IPv6 Address:
- In each quartet, remove the starting & consecutive 0s (0001 -> 1, 0000 -> 0 & 0092 -> 92).
- If there are two or more consecutive quartet of all 0s, replace it with double colon (::), but you can use double colon only once in a single address.
But in the above example, two or more quartet of all 0s occured two times, then which quartet to be replaced? In such cases, the highest no of consecutive 0s are replaced by a double colon(::). Examples:
◙ 1111:2222:3333:0000:0000:1000:ffee:0001 It can be written in abbreviated form as 1111:2222:3333::1000:ffee:1 ◙ 0001:0002:0003:0000:0000:1023:0000:0022 -> 1:2:3::1023:0:22 ◙ ffee:0000:0000:0001:0000:0000:0000:0001 -> ffee:0:0:1::1 ◙ 1a2b:0000:0000:0000:0000:0000:0000:0002 -> 1a2b::2
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- IP Addressing | Classless Addressing
- Difference between Implied addressing mode and Immediate addressing mode
- What is IPv6?
- IPv6 Fragmentation Header
- Differences between IPv4 and IPv6
- Compression of IPv6 address
- Transition from IPv4 to IPv6 address
- Internet Protocol version 6 (IPv6)
- Internet Protocol version 6 (IPv6) Header
- Introduction of Classful IP Addressing
- Classful Vs Classless Addressing
- Computer Networks | IP Addressing | Question 5
- Computer Networks | IP Addressing | Question 6
- Difference between Direct and Immediate Addressing Modes
- Difference between Indirect and Immediate Addressing Modes
- What is APIPA (Automatic Private IP Addressing)?
- Difference between Indirect and Implied Addressing Modes
- Difference between Direct and Indirect Addressing Modes
- Difference between Direct and Implied Addressing Modes
- Difference between PC relative and Base register Addressing Modes
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