Network Protocols and the 4 Layer Model

Question 1

What are protocols?

Answer 1

Sets of rules for communication
There need to be accepted rules to do devices can be compatible and reliably communicate-these are what protocols are.
Protocols are usually developed in layers, with each being responsible for a different part of the communication process. TCP/IP has 4.

Question 2

The 4 layers

Answer 2

Application layer: HTTP/S,FTP, SMTP, IMAP and POP, DNS
Transport layer: TCP, UDP
Network layer: IP
Link layer: Ethernet, WiFi

Question 3

Application Layer

Answer 3

Where the network applications operate (E.G web browsers, email client)

Question 4

Transport Layer

Answer 4

Sets up the communication between the two hosts, including agreed rules (like packet size)

Question 5

Network Layer

Answer 5

Addresses and packages the data, then actually routes it

Question 6

Link Layer

Answer 6

Where the hardware (E.G NIC) and drivers operate