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What is the most compressed valid format of the IPv6 address 2001 :0db8:0000:0016:0000:001b: 2000:0056?
Suggested Answer: D
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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.
Cisco Learning Network
IPv6 Addressing (Cisco)
12 comments · newest first
NA
Natalya
1 month ago
D seems right. It keeps all the necessary parts intact.
CH
Chauncey
2 months ago
I feel like C is simpler. Less zeros to deal with.
GE
Georgiann
2 months ago
I think the answer is B. It looks the most compressed.
FR
Freida
2 months ago
I thought it was supposed to be more compact than that!
CY
Cyril
2 months ago
Wait, can you really have two "::" in one address?
LA
Latanya
2 months ago
D seems off, not sure about that one.
KI
Kiley
2 months ago
I think C is the right answer. Looks clean.
NA
Nana
3 months ago
It's definitely not A, too many colons!
ME
Melynda
3 months ago
I’m leaning towards option C, but I’m not confident about the placement of the double colon.
BO
Bobbie
3 months ago
I feel like option A looks too cluttered with colons. I think it should be more streamlined.
TA
Taryn
3 months ago
I think I practiced a question like this, and I recall that you can only have one "::" in an address.
NE
Nell
3 months ago
I remember something about compressing leading zeros, but I'm not sure how many colons to use.