Address Classes

Question 0

What is the range of class B IP addresses?

Answer 0

128-191

Question 1

What is the range of class A IP addresses?

Answer 1

1-127

Question 2

What is the range of class C IP addresses?

Answer 2

192-223

Question 3

What is the default subnet mask for class A IP addresses? What is the shorthand way of writing it?

Answer 3

1) 255.0.0.0

2) /8

Question 4

What is the default subnet mask for class B IP addresses? What is the shorthand way of writing it?

Answer 4

1) 255.255.0.0

2) /16

Question 5

What is the default subnet mask for class C IP addresses? What is the shorthand way of writing it?

Answer 5

1) 255.255.255.0

2) /24

Question 6

What does it mean when someone is using “Classless Addressing?”

Answer 6

Simply, it means using a subnet mask for an address which is not its default. For example, the class A address 10.0.0.1 might have the class C default subnet mask 255.255.255.0 applied to it. The advantage (as far as I can tell) is that a class C subnet mask designates only the last octet for hosts and therefore limits the network to 254 possible host addresses.

Question 7

What are the different types of network communications that exist?

Answer 7

Unicast
Multicast
Broadcast

Question 8

What is meant by “Unicast?”

Answer 8

One message to one device

Question 9

What is meant when we say “Broadcast?”

Answer 9

One message to every device on the local network (one primary role of a router is to contain to the local network broadcasts within the local network)

Question 10

What do we mean when we say “Multicast?”

Answer 10

One message to a group of devices (the way of the future)

Question 11

What is the range of class D (Multicast) IP addresses?

Answer 11

224 - 239

Question 12

What is the range of class E (Experimental) IP addresses?

Answer 12

240-254