Chapter 29 - IPv6 Addressing and Subnetting

Question 1

Which of the following IPv6 addresses appears to be a unique local unicast address, based on its first few hex digits?

a. 3123:1:3:5::1
b. FE80::1234:56FF:FE78:9ABC
c. FDAD::1
d. FF00::5

Answer 1

C.

Unique local addresses begin with FD in the first two digits.

Question 2

Which of the following IPv6 addresses appears to be a global unicast address, based on its first few hex digits?

a. 3123:1:3:5::1
b. FE80::1234:56FF:FE78:9ABC
c. FDAD::1
d. FF00::5

Answer 2

A.

Global unicast addresses can begin with many different initial values, but most commonly they begin with either a hex 2 or 3.

Question 3

When subnetting an IPv6 address block, an engineer shows a drawing that breaks the address structure into three pieces. Comparing this concept to a three-part IPv4 address structure, which part of the IPv6 address structure is most like the IPv4 network part of the address?

a. Subnet
b. Interface ID
c. Network
d. Global routing prefix
e. Subnet router anycast

Answer 3

D.

The global routing prefix is the address block, represented as a prefix value and prefix length, given to an organization by some numbering authority. All IPv6 addresses inside the company have the same value in these initial bits of their IPv6 addresses. Similarly, when a company uses a public IPv4 address block, all the addresses have the same value in the network part.

Question 4

When subnetting an IPv6 address block, an engineer shows a drawing that breaks the address structure into three pieces. Assuming that all subnets use the same prefix length, which of the following answers lists the name of the field on the far right side of the address?

a. Subnet
b. Interface ID
c. Network
d. Global routing prefix
e. Subnet router anycast

Answer 4

B.
Subnetting a global unicast address block, using a single prefix length for all subnets, breaks the addresses into three parts. The parts are the global routing prefix, subnet, and interface ID.

Question 5

For the IPv6 address FD00:1234:5678:9ABC:DEF1:2345:6789:ABCD, which part of the address is considered the global ID of the unique local address?

a. None; this address has no global ID.
b. 00:1234:5678:9ABC
c. DEF1:2345:6789:ABCD
d. 00:1234:5678
e. FD00

Answer 5

D.

Unique local addresses begin with a 2-hex-digit prefix of FD, followed by the 10-hex-digit global ID.