CCNP Route FAQ: IP Version 6 Addressing Figure: IPv4 Classless and Classful Addressing, IPv6 Addressing Q1. Which of the following is the shortest valid abbreviation for FE80:0000:0000:0000:0010:0000:0000:0123? a. FE80::10::123 b. FE8::1::123 c. FE80:0:0:0:10::123 d. FE80::10:0:0:123 Answer: D. Inside a quartet, any leading 0s can be omitted, and one sequence of one … [Read more...]