Home » Cisco » 100-101 » Which option is a valid IPv6 address?
Which option is a valid IPv6 address?
A. 2001:0000:130F::099a::12a
B. 2002:7654:A1AD:61:81AF:CCC1
C. FEC0:ABCD:WXYZ:0067::2A4
D. 2004:1:25A4:886F::1
Correct Answer: D
Explanation/Reference:
Explanation:
IPv6 Address Notation
IPv6 addresses are denoted by eight groups of hexadecimal quartets separated by colons in between them.
Following is an example of a valid IPv6 address: 2001:cdba:0000:0000:0000:0000:3257:9652
Any four-digit group of zeroes within an IPv6 address may be reduced to a single zero or altogether omitted.
Therefore, the following IPv6 addresses are similar and equally valid:
2001:cdba:0000:0000:0000:0000:3257:9652
2001:cdba:0:0:0:0:3257:9652
2001:cdba::3257:9652
Reference: http://www.ipv6.com/articles/general/IPv6-Addressing.htm
|
FULL Printable PDF and Software. VALID exam to help you pass.
|
 |
D is the only correct answer.
A has double colons twice which is not allowed
B only has 6 sets rather than 8 (and no double colon to fill in the remaining)
C has non-valid hex characters (WXYZ)
why not c?
Why it cannot be A?
Because you can only have one set of Double Colons in an Address so not to occur confusion.
én tudom, de nem mondom meg bibibi
DE MELYIK????