Question

Which three options are valid representations of the IPv6 address 2001:0db8:85a3:0000:0000:8a2e:0370:7334? (Choose three.)

A) 2001:db8:85a3:0:0:8a2e:370:7334

B) 2001:db8:85a3::8a2e:370:7334

C) 2001:0db8:85a3:0000:0000:8a2e::7334

D) 2001:db8:85a3::8a2e:0:7334

E) 2001:db8:85a3:0000:0000:8a2e:0370::7334

Answer 1

Valid representations of the IPv6 address include removal of leading zeros and replacing consecutive zero blocks with double colons. Options A, B, and D are correct as they adhere to these rules, while options C and E are not valid due to multiple use of double colons.

Step-by-step explanation:

The question is about finding valid representations of an IPv6 address. In IPv6, leading zeros in each block can be omitted and one series of consecutive blocks of zeros can be replaced by double colons (::), but this can only be done once in an address to avoid ambiguity.

Therefore, the valid representations for the IPv6 address 2001:0db8:85a3:0000:0000:8a2e:0370:7334 are:

• Option A: 2001:db8:85a3:0:0:8a2e:370:7334 - Leading zeros within each block are removed.
• Option B: 2001:db8:85a3::8a2e:370:7334 - Consecutive blocks of zeros are replaced with ::.
• Option D: 2001:db8:85a3::8a2e:0:7334 - Again, consecutive blocks of zeros are replaced with :: (different placement).

Options C and E use more than one set of double colons, which is not allowed as it created ambiguity.