Connectivity

Question 1

What is a network?

Answer 1

When two or more computer are connected together to exchange data

Question 2

What does each computer must have?

Answer 2

• A Network interface card (NIC) - Network communications software

Question 3

A computer that is not linked to a network is called…

Answer 3

Stand-Alone computer

Question 4

What is a network of computers in the same building called?

Answer 4

Local Area Network (LAN)

Question 5

What is a network connected over a wide geographic area called?

Answer 5

Wide Area Network (WAN)

Question 6

The way in which a network is configured is called…

Answer 6

a network topology

Question 7

What network topology is this?

Answer 7

Bus

Question 8

What network topology is this?

Answer 8

Star

Question 9

What network topology is this?

Answer 9

Ring

Question 10

Draw the Bus Network

Answer 10

Question 11

Draw the Star Network

Answer 11

Question 12

Draw the Ring Network

Answer 12

Question 13

What does a bus network consist of?

Answer 13

• The speed of data communication is slow
• Data travels in both directions
• Are the cheapest to set up
• If one computer on the network fails the others carry on
• Each computer is linked into the bus

Question 14

What does a Star Network consist of?

Answer 14

• Failure of one computer will not affect the rest of the network
• The hub directs the flow of data
• If the hub fails then all computer will be affected
• Faster but more expensive as it uses more cables
• Are connected to a central computer (file server) or a hub.

Question 15

What does a ring network consist of?

Answer 15

• If one computer breaks the other will be affected
• Computers commucicate by sending data round the loop until it reaches the receving computer

Question 16

What is the internet?

Answer 16

Network of computer across the world

Question 17

What are the points about interent?

Answer 17

• The coverage is world wide
• Allow data to be shared
• Uses telephone lines and satellite communications

Question 18

What is Intranet?

Answer 18

Network providing similar services to the internet

Question 19

What are the points about Intranet?

Answer 19

• There are restrictions to who can use it
• Generally limited to one organisation

Question 20

What is Extranet?

Answer 20

Part of intranet that is able to be accessed by authorised members of public using the internet

Question 21

What does WWW Stand for?

Answer 21

World Wide Web - a collection of multimedia information

Question 22

A router is a device that…

Answer 22

• Communicates with other routers to work out the best route
• Determines the best path for forwarding the packets
• Located at gateways (two networks connect)
• fowards data packets along a network

Question 23

What is a switch?

Answer 23

A device that filters data packets and fowards packets between segments of the network.

Question 24

What is a gateway?

Answer 24

A system to allow a LAN to connect with a WAN, such as the internet

Question 25

What is a bridge?

Answer 25

Connects a LAN to another LAN that uses the same protocol

Question 26

How is data moved around?

Answer 26

Packet

Question 27

What is packet switching?

Answer 27

Is the process by which network components check each packet, look at its address and firect it along the correct route.

Question 28

What does each packet contain?

Answer 28

Binary digits, control data amd address.

Question 29

What is control data?

Answer 29

How many packets are being sent

Question 30

What are the advantages of using packets as opposed to direct wire links?

Answer 30

- If one packet out of transmission fails only that one has to be resent

Question 31

What are the advantages and disadvatages of networks versus stand-alone computers?

Answer 31

- Data entered into a stand-alone computer is only avalibale to the user on that computer - Each stand-alone computer needs its own software installed - A stand-alone computer needs its own printer, scanner and - Stand-alone computer is less vulnerable to virus attack