Volume 1 - Chapter 11: Perspectives on IPv4 Subnetting

Question 1

What does VLSM stand for?

Answer 1

Variable Length Subnet Masks

Question 2

Describe the function of a RIR.

Answer 2

A Regional Internet Registry assigns IP address to specific companies.

Question 3

Which RIR covers North America?

Answer 3

ARIN (American Registry for Internet Numbers)

Question 4

Describe the function of CIDR.

Answer 4

Classless Inter-Domain Routing is used to assign a subnet of a public IP network to reach company, rather than an entire public IP network.

Question 5

Which RFC is used to describe the range of available private IP addresses?

Answer 5

RFC 1918

Question 6

How many host and network bits are in a Class A network before subnetting?

Answer 6

8 network bits, 24 host bits

Question 7

How many host and network bits are in a Class B network before subnetting?

Answer 7

16 network bits, 16 host bits

Question 8

How many host and network bits are in a Class C network before subnetting?

Answer 8

24 network bits, 8 host bits

Question 9

What is the default format to determine how many subnet bits are required to support a number of X subnets?

Answer 9

2 to the power of 2, must be greater than or equal to X

Question 10

What is the default format to determine how many host bits are required to support a number of X host?

Answer 10

(2 to the power of 2) minus 2, must be greater than or equal to X