3 L3) Layer 3 The Network Layer

Question 1

What is Layer 3?

Answer 1

Network Layer L3

Question 2

What is the purpose of the Network Layer (3)

Answer 2

The Network Layer is all about Routing. Routing is how to forward Data traffic. Routing is sometimes called Switching. Do not confuse Switching with Switches, the physical device.

Question 3

What is an IP Address?

Answer 3

An IP Address is a Logical address that is either an IPV 4 and/or an IPV 6 or both addresses. Both IPV 4 & IPV 6 are Layer 3 Protocols. All clients on a network have an IP address.

Question 4

What is an IPV 4 address?

Answer 4

An IPV 4 address consists of a dotted octet notation. An example of this is 172.196.127.16

Question 5

What are the 3 ways of Routing?

Answer 5

Routing consists of 3 ways to forward information.
1) Packet Switching
2) Circuit Switching
3) Message Switching

Question 6

What is Packet Switching?

Answer 6

Packet Switching is the most common form of Forwarding Data and is also known as Routing. Packet Switching is when Data is divided into Packets and then forwarded to

Question 7

What is Circuit Switching?

Answer 7

Circuit Switching is when the Data takes a dedicated communications link established between 2 devices, the same path during the entire connection. An example is a phone call connection.

Question 8

What is Message Switching?

Answer 8

Message Switching is when all the Data is divided into messages which may be stored and then forwarded, more like email.