Chapter 26

Question 1

global routing prefix

Answer 1

global routing prefix
An IPv6 prefix that defines an IPv6 address block made up of global unicast addresses, assigned to one organization, so that the organization has a block of globally unique IPv6 addresses to use in its network.

Question 2

global unicast address

Answer 2

global unicast address
A type of unicast IPv6 address that has been allocated from a range of public globally unique IP addresses, as registered through IANA/ICANN, its member agencies, and other registries or ISPs.

Question 3

Interface ID (IID)

Answer 3

The ending (rightmost) portion of the structure of an IPv6 address, usually 64 bits long.

Question 4

Prefix (prefix ID)

Answer 4

In both IPv4 and IPv6, this term refers to the number that identifies a group of IPv4 or IPv6 addresses, respectively. Another term for subnet identifier.

Question 5

subnet router anycast address

Answer 5

subnet router anycast address
A special anycast address in each IPv6 subnet, reserved for use by routers as a way to send a packet to any router on the subnet. The address’s value in each subnet is the same number as the subnet ID.

Question 6

ULA global ID

Answer 6

The unique local address (ULA) for one organization uses a /48 prefix, composed of a set hex FD in the first 8 bits, with a 10-hex digit (40 bit) global ID, which should be generated by a pseudo-random algorithm.

Question 7

unique local address

Answer 7

unique local address
A type of IPv6 unicast address meant as a replacement for IPv4 private addresses.