In the IPv6 address 2001:DB8:130F::870:0:140B/64, which portion is the IPv6 interface
identifier?

A.
2001:DB8:130F:0

B.
870:0:140B

C.
2001:DB8:130F

D.
0:870:0:140B

Explanation:
The CIDR prefix representation is used to represent the IPv6 address. An example of this
notation is: 2001:DB8:130F::870:0:140B/64The /64 indicates that the first 64 bits are being used to represent the network and the
last 64 bits are being used to represent the interface identifier.
https://www.cisco.com/web/strategy/docs/gov/IPv6_WP.pdf