1.3.2 Wired/Wireless Networks, Protocols & Layers

Question 1

POP

Answer 1

Post Office Protocol
Retrieves mail from mail server and transfers it to your device.

Question 2

IMAP

Answer 2

Internet Message Access Protocol
Keeps mail on the mail server, allows you to access it from any device, and to manage remote mail boxes.

Question 3

SMTP

Answer 3

Simple Mail Transfer Protocol
Used by clients to send emails to the mail server.

Question 4

FTP

Answer 4

File Transfer Protocol
Used for uploading web pages and associated files to a web server for hosting, and for sending files between devices.

Question 5

TCP / IP

Answer 5

Transmission Control Protocol / Internet Protocol
Provides an error free transmission between 2 routers (TCP) and routing packets on a WAN (IP).

Question 6

HTTPS

Answer 6

Hypertext Transfer Protocol Secure
Encryption and authentication for client-server data.

Question 7

HTTP

Answer 7

Hypertext Transfer Protocol
A client-server method of requesting and delivering HTML files.

Question 8

The Concept of Layers.

Answer 8

A group of protocols with a similar role.
Layer 4- Application
Layer 3 - Error Handling (TCP)
Layer 2 - IP Routing
Layer 1 - MAC Frames (sent by fibre optic/ Wi-Fi)

Question 9

Advantages of Layers.

Answer 9

Reduces complexity of the problem into manageable sub-problems.
Devices can be manufactured to operate at a particular layer.
Devices from different vendors can work together.