LU5 - Wide Area Network

Question 1

Fibre Optic Backbone

Answer 1

Connects various parts of a network, providing a path for exchange of information

Question 2

WAN

Answer 2

A network not confined to one area and can be owned by multiple organisations
(Internet(GAN))

Question 3

Gateways

Answer 3

A device that provides connectivity between two or more network segments

(Protocol converters)

A router can act as a gateway for TCP/IP Networks (Sending and receiving on the internet)

Question 4

Satellite Radio Waves

Answer 4

Satellite Technology to provide voice and video calling, internet televison and radio channels

Question 5

Satellite

Answer 5

Communication satellite comprises
Transponder, Antenna, Communication payload, Switching systems, command , control system.

Question 6

Microwave

Answer 6

Microwave link is a communications system that uses a beam of radio waves in the microwave frequency range to transmit

(Video, audio, data between locations)

Question 7

Cellular Technology

Answer 7

A cell network consists of many signal areas called CELLS

CELLS overlap creating coverage over large area

Each CELL has a base station which sends and receives mobile transmissions

Question 8

3G

Answer 8

Third generation of mobile data technology

Improved data transfer (supports large data formats [HTML pages, videos, music])

Question 9

LTE (Long Term Evolution)

Answer 9

Improvement of 3G, not substantial enough to be a new generation

Question 10

4G

Answer 10

Provides faster connection speeds and mobile hotspots

• View digital Media(Stream without long load times, and buffering)

Question 11

5G

Answer 11

Presumed to be faster, smarter and more efficient than 4G

• Mobile data speed faster than home broadband network (100 gigabits ps-1)
• Low Latency(delay) is the key difference between 5G and 4G

Question 12

Fibre

Answer 12

Uses fibre optic cables to transmit data

Question 13

ADSL (Asymmetric Digital Subscriber Line)

Answer 13

Uses telephone line to transmit data along copper cables

Question 14

Bandwidth

Answer 14

Is the theoretical amount of data that can be transmitted from one point to another in a certain amount of time.

Question 15

SMTP (Simple Mail Transfer Protocol)

Answer 15

Used when email is delivered from email client
(Usually for outgoing emails)

Question 16

POP3 (Post Office Protocol)

Answer 16

Allows an email client to download and email from server

Question 17

IMAP (Internet Message Access Protocol)

Answer 17

Offers more features than POP3, allows users to keep their email on email server

Requires greater disk space

Question 18

Web Protocols

Answer 18

Protocols, set of rules which enable connection, communication and data transfer

Question 19

HTTP (Hyper-Text Transfer Protocol)

Answer 19

Standard protocol for transferring web pages and their content across the internet

• Used for displaying the file in browser

Question 20

HTTPS (Hyper-Text transfer Protocol Over Secure Socket Layer)

Answer 20

Secure version of HTTP

Used mainly on websites that ask user to provide personal or sensitive information

Web page using HTTPS, are using a SSL(Secure Socket Layer)
Websites need SSL Certificates to be trusted

Question 21

FTP (File Transfer Protocol)

Answer 21

Used to transfer files over the internet

• simply to transfer file from one computer to another specified location

Question 22

WebDAV

Answer 22

An extension of HTTP protocol, used to for communication between client browsers and web servers.

Question 23

Proxy Server

Answer 23

A server through which all web contents pass

Question 24

Local Server

Answer 24

The company has physical control over the server setup and management of data and hardware.