IP Address Classes

Question 1

What sections can IP addresses be split to?

Answer 1

Two sections, the network ID and the host ID.

Question 2

How many classes are there for IP Addresses? What are they?

Answer 2

Five: Class A, Class B, Class C, Class D, and Class E.

Question 3

How does Class A split the IP address?

Answer 3

Class A addresses are those where the first octet is used for the network ID and the last three are used for the host ID.

Question 4

How does Class B split the IP address?

Answer 4

Class B addresses are where the first two octets are used for the network ID, and the second two are used for the host ID.

Question 5

How does Class C split the IP address?

Answer 5

Class C addresses are where the first three octets are used for the network ID, and only the final octet is used for the host ID.

Question 6

Describe Class D addresses

Answer 6

Class D addresses always begin with the bits 1110, and are used for multicasting, which is how a single IP datagram can be sent to an entire network at once. These addresses begin with decimal values between 224 and 239.

Question 7

Describe Class E addresses

Answer 7

Class E addresses make up all of the remaining IP addresses. But they are unassigned and only used for testing purposes.

Question 8

What system has mostly replaced the Class System?

Answer 8

CIDR (Classless Inter-Domain Routing)