Networks

Question 1

The Internet

Answer 1

A group of inter-connected networks

Question 2

The World Wide Web

Answer 2

It is one service that makes use of the Internet

Question 3

WAN

Answer 3

Wide Area Network ( large geographical area)

Question 4

Packet

Answer 4

One unit of data sent through an IP network

Question 5

Routing

Answer 5

directing IP packets to their destinations

Question 6

IP address

Answer 6

Internet Protocol address. Where packets of data are sent to or recieved from

Question 7

MAC address

Answer 7

Media Control address. The unique identifier of each device (or network interface card)

Question 8

Router

Answer 8

Routes packets between two networks

Question 9

Switch

Answer 9

Connects two or more devices together, data is sent only to the device it is intended for.

Question 10

Wireless network

Answer 10

A network using radio waves

Question 11

Wired Network

Answer 11

A network using cables

Question 12

LAN

Answer 12

Local Area Network

Question 13

Advantages of LAN

Answer 13

. Computers can share resources such as printers
. Files can be accessed through any computer in the network
. Data is easy to back up as it is stored centrally on the server

Question 14

Disadvantages of LAN

Answer 14

. Purchasing the network hardware is expensive
. Managing a large network is complicated
. Viruses may be able to infiltrate the network and infect every computer

Question 15

Topology

Answer 15

The way in which parts of the system are connected

Question 16

Two types of topology:

Answer 16

. Star
. Bus

Question 17

Star Topology

Answer 17

Computers and other devices (known as nodes) are all connected to a central switch

Question 18

Bus Topology

Answer 18

Computers and other devices are all connected to a central coaxial cable

Question 19

Advantages of Star Topology

Answer 19

. Fast data transfer to the hub as each wire isn’t shared with other computers
. If one cable fails the other computers are not affected

Question 20

Disadvantages of Star Topology

Answer 20

. Requires additional hardware such as the central switch and network cables

Question 21

Advantage of Bus Topology

Answer 21

. Less cable so cheaper to install the network
. Easier to add more devices as they only need to connect to a central cable

Question 22

Disadvantages of Bus Topology

Answer 22

. The single cable is shared by many devices so there will be many ‘collisions’ of data if data is sent at the same time
. If the cable is damaged, the whole network fails
. Any device can view all data on the cable creating a security risk