Which option is a valid IPv6 multicast address?

A.
fe80::205:8640:471:3200/64

B.
::172.16.0.5/126

C.
ff03:365:ba::23

D.
ff01:cgfc:345::226:8ff:fee4:bf6f

Show Hint

← Previous question

Next question →

Leave a Reply 2

koraa

This is confusing. As all of the choices except C are not closely related to a multicast address, we can say C is the answer [A and B don’t have the first 8 bits of 1’s, and D is a wrong IPv6 address as there is no such thing as ‘g’ in hex].

But lets look at C. An IPv6 multicast address has the first 16 bits of format
[8bits of 1’s][4 bits for flags][4 bits for scope ID]
But in C, the scope ID is 3, which is not one of the currently defined scope ID values (defined decimal values are 0,1,2,5,8,14,15).

Any thoughts?

Reply

Lavrovo

Reply