Networks

Question 1

WAN (Wide Area Network)

Answer 1

An area connecting LANs over a large geographical area

Question 2

NIC (Network Interface Card)

Answer 2

Formats data from a computer according to the protocols of the network

Question 3

Copper cable

Answer 3

• carries electric current
• cheap
• lower bandwidth

Question 4

Fibre optic cable

Answer 4

• pulses of light
• more expensive
• higher bandwidth

Question 5

Bandwidth

Answer 5

The measure of how much data that can be transferred every second

Question 6

WAP (Wireless Access Point)/ or router

Answer 6

Allows wireless devices to connect to a wired network using wifi

Question 7

Wired Network

Answer 7

• high bandwidth
• expensive for cabling
• security is good
• not mobile
• no interference

Question 8

Wireless network

Answer 8

• low bandwidth
• cheap
• poor security
• signal can be affected by walls or congestion
• very mobile

Question 9

Topology

Answer 9

The physical layout of computers on a network.

Question 10

Bus topology

Answer 10

• less cable length
• can be set up quickly
• security risks (everyone can see)
• if cable breaks then all will be affected

Question 11

Star topology

Answer 11

• Less traffic
• Security is better
• One link fails the rest will work
• Depends on server to be working
• More cable needed

Question 12

IP address

Answer 12

A set of numbers used to identify one particular device

Question 13

Domain name

Answer 13

The name that identifies a Web site.

Question 14

Packets

Answer 14

A small block of data transmitted from one computer to another

Question 15

Header (packets)

Answer 15

Contains source and destination

Question 16

Body (packets)

Answer 16

Contains part of the complete message data

Question 17

Footer(packets)

Answer 17

Informs device it has reached the end of packet and checks for errors

Question 18

How data transmits

Answer 18

• Source computer splits file into packets
• Packets sent using cables or microwaves
• Routers inspect packet and decide best route
• If there is a problem with network the packets will be diverted

Question 19

Packet switching

Answer 19

Message broken down and sent over more suitable routes (assembled at the end)

Question 20

Protocols

Answer 20

Set of rules in order to perform and action

Question 21

TCP/IP

Answer 21

Transmission Control Protocol/Internet Protocol

Question 22

Application layer (1st)

Answer 22

Selects correct protocol based on what you are trying to do

Question 23

Transport layer (2nd)

Answer 23

Creates link between two people and divides packets up

Question 24

Network layer (3rd)

Answer 24

Sends and routes the data

Question 25

Link layer (4th)

Answer 25

Transmits data to the computer itself (through cable normally)

Question 26

FTP (File Transfer Protocol)

Answer 26

Rules followed when files are transferred

Question 27

POP

Answer 27

Post Office Protocol

Question 28

IMAP4

Answer 28

Internet Message Access Protocol v4 used to retrieve emails from a server

Question 29

Benefits of separate layers

Answer 29

Layers can be developed independently without any knowledge of other layers