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What is the most compressed valid format of the IPv6 address 2001 :0db8:0000:0016:0000:001b: 2000:0056?
Correct Answer: D
IPv6 addresses can be compressed by removing leading zeros and replacing consecutive groups of zeros with a double colon (::). Here's how to compress the address 2001:0db8:0000:0016:0000:001b:2000:0056: * Remove leading zeros from each segment: * 2001:db8:0000:0016:0000:001b:2000:0056 becomes 2001:db8:0:16:0:1b:2000:56 * Replace the longest sequence of consecutive zeros with a double colon (::). In this case, the two consecutive zeros between the 16 and 1b: * 2001:db8:0:16::1b:2000:56 Thus, the most compressed valid format of the IPv6 address is 2001:db8:0:16::1b:2000:56. References:= * Cisco Learning Network * IPv6 Addressing (Cisco)