Chapter 12

Question 1

CIDR Block

Answer 1

CIDR Block
A set of consecutive public IPv4 addresses whose size can be any power of 2. Used as an alternative to the original process with public IP networks of three set sizes.

Question 2

default mask

Answer 2

default mask
The mask used in a Class A, B, or C network that does not create any subnets; specifically, mask 255.0.0.0 for Class A networks, 255.255.0.0 for Class B networks, and 255.255.255.0 for Class C networks.

Question 3

network broadcast address

Answer 3

network broadcast address
In IPv4, a special address in each classful network that can be used to broadcast a packet to all hosts in that same classful network. Numerically, the address has the same value as the network number in the network part of the address and all 255s in the host octets; for example, 10.255.255.255 is the network broadcast address for classful network 10.0.0.0.

Question 4

network ID

Answer 4

A number that identifies an IPv4 network, using a number in dotted-decimal notation (like IP addresses); a number that represents any single Class A, B, or C IP network.

Question 5

network number

Answer 5

network number
A number that uses dotted-decimal notation like IP addresses, but the number itself represents all hosts in a single Class A, B, or C IP network.

Question 6

unicast IP address

Answer 6

An IP address that represents a single interface. In IPv4, these addresses come from the Class A, B, and C ranges.