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Higher Computing > Computer Systems: Chapter 4 (Networking) > Flashcards

Computer Systems: Chapter 4 (Networking) Flashcards

1
Q

What is a Network?

A

It is two or more computer linked together in such a way that data and messages may be exchanged between them

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2
Q

What is a Local Area Network (LAN)?

A

A LAN is a network that covers a small geographical area

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3
Q

What is a Wide Area Network (WAN)?

A

A WAN is a network that covers a large geographical area

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4
Q

What is an Internetwork?

A

An Internetwork is a collection of two or more LANS

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5
Q

What is a Mainframe?

A

A large, powerful computer system that can process a huge amount of data at high speed

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6
Q

What is a File server?

A

A File server provides central disk storage for user’s programs and data on a network

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7
Q

What is a Print server?

A

A Print server allows all of the client stations to use a printer controlled by it

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8
Q

What is a Web server?

A

A Web server is a computer that provides World Wide Web services to a network

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9
Q

What is a Node?

A

A computer on a network

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10
Q

What is a Channel?

A

It is a link between 2 nodes on a network, or any type of communication channel

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11
Q

What is a Topology?

A

It is the way in which the nodes on the network are connected together

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12
Q

What happens if there is a Node failure on a Bus Topology? What happens if there is a Channel failure on a Bus topology?

A
  • Node failure - No effect on rest of network

* Channel failure - Network is down

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13
Q

What happens if there is a Node failure on a Star Topology? What happens if there is a Channel failure on a Star topology?

A
  • Node failure - No effect on rest of network, unless central node
  • Channel failure - No effect on rest of network
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14
Q

What happens if there is a Node failure on a Ring Topology? What happens if there is a Channel failure on a Ring topology?

A
  • Node failure - No effect on rest of network, node bypassed

* Channel failure - Network is down

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15
Q

What happens if there is a Node failure on a Mesh Topology? What happens if there is a Channel failure on a Mesh topology?

A
  • Node failure - No effect on rest of network

* Channel failure - No effect on rest of network

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16
Q

What is a Repeater?

A

A Repeater is a device which amplifies a signal on a cable

17
Q

What is a Hub?

A

A Hub is a multi-port Repeater

18
Q

What is a Switch?

A

A Switch is a ‘Smart Hub’, it divides a network into separate segments, one for each machine

19
Q

What is an advantage of using a Switch over a Hub?

A

If you use a Switch then there are no collisions between signals to reduce speed of network, whereas using a Hub increases network traffic

20
Q

What is a Router?

A

A Router is a device which links 2 or more networks

21
Q

How does a Router work?

A

It looks at the destination address of packets of data passing through it, and decides which route each packet should take

22
Q

What is Bandwidth?

A

Bandwidth is a measure of the quantity of data which may be carried by a communications channel at any one time

23
Q

What are the 3 varieties of 802.11 Wi-Fi standards?

A
  • 802.11a
  • 802.11b
  • 802.11g
24
Q

What is Bluetooth?

A

A WPAN that allows short range wireless communications between devices up to 10m apart

25
Q

What are advantages of higher Bandwidth? (2)

A
  • You can transmit larger data files

* You can support video conferencing

26
Q

What are advantages of Wireless communications? (2)

A
  • No trailing wires

* You can move about without being tied to a desk

27
Q

What are the advances in computer hardware? (4)

A
  • Advances in processors
  • Advances in main memory capacity
  • Advances in Backing Storage
  • Advances in Data Transfer Rates
28
Q

What are the advances in network-related software? (3)

A
  • Advances in Browser software
  • Advances in Communications software
  • Advances in Network operating systems
29
Q

What is the Copyright, Designs and Patents Act?

A

An act that covers breaches of copyright, such as illegal copying of software, music and movies

30
Q

What is the Computer Misuse Act?

A

An act that makes it illegal to gain unauthorised access to a computer system (hacking) and the spreading of viruses

31
Q

What is the Data Protection Act?

A

It is an act that covers how information may be held and for what purposes

32
Q

What are the advantages of using a Cabled network (As opposed to wireless)? (2)

A
  • Transmission rates are faster (than wireless)

* The range is fixed

33
Q

What are the differences between a network and a mainframe? (2)

A
  • Each computer on a network has its own built in processor and memory
  • A terminal is reliant on the processor and memory of the mainframe
34
Q

How does a switch reduce collisions? (1)

A

A switch reduces collisions in a network by allocating the whole bandwidth to each connected computer

Higher Computing (17 decks)

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