Which compressed IPv6 address should be configured on R1 GigabitEthernet1/1 for 2001:0db8:0000:0000:0500:000a:400F:583B?
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Correct answer: ipv6 address 2001:db8::500:a:400F:583B.
Why this is the answer
The correct answer is ipv6 address 2001:db8::500:a:400F:583B. IPv6 compression rules allow leading zeros in each 16-bit segment (hextet) to be omitted, and a single instance of one or more consecutive hextets containing only zeros to be replaced by a double colon (::). In the original address 2001:0db8:0000:0000:0500:000a:400F:583B: 0db8 becomes db8 (leading zero omitted). 0000:0000 becomes :: (two consecutive zero hextets). 0500 becomes 500 (leading zero omitted). 000a becomes a (leading zeros omitted). Option A is incorrect because it uses :: twice, which is not allowed. Option B incorrectly compresses 400F to 4F. Option D incorrectly compresses 0500 to 5 and 400F to 4F.
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