200-301 · Question #573
A network administrator is setting up a new IPv6 network using the 64-bit address 2001:0EB8:00C1:2200:0001:0000:0000:0331/64. To simplify the configuration, the administrator has decided to compress t
The correct answer is C. ipv6 address 2001:EB8:C1:2200:1::331/64. IPv6 address compression involves omitting leading zeros in each 16-bit segment and replacing one longest sequence of consecutive zero segments with a double colon (::).
Question
A network administrator is setting up a new IPv6 network using the 64-bit address 2001:0EB8:00C1:2200:0001:0000:0000:0331/64. To simplify the configuration, the administrator has decided to compress the address. Which IP address must the administrator configure?
Options
- Aipv6 address 21:EB8:C1:2200:1::331/64
- Bipv6 address 2001:EB8:C1:22:1::331/64
- Cipv6 address 2001:EB8:C1:2200:1::331/64
- Dipv6 address 2001:EB8:C1:2200:1:0000:331/64
How the community answered
(42 responses)- A14% (6)
- B2% (1)
- C76% (32)
- D7% (3)
Why each option
IPv6 address compression involves omitting leading zeros in each 16-bit segment and replacing one longest sequence of consecutive zero segments with a double colon (::).
This option incorrectly compresses the first segment `2001` to `21` and also has an extra colon before `EB8` if it was intended to replace leading zeros.
This option incorrectly compresses the fourth segment `2200` to `22`, removing significant digits that are not leading zeros.
The address `2001:EB8:C1:2200:1::331/64` correctly compresses `0EB8` to `EB8`, `00C1` to `C1`, `0001` to `1`, `0000:0000` to `::`, and `0331` to `331`, following all IPv6 compression rules.
This option does not fully compress the address as it retains `0000` instead of `0` and does not use `::` for the `0000:0000` sequence.
Concept tested: IPv6 address compression
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/xe-16/ipv6-xe-16-book/ipv6-addr-basic.html
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