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OCR GCSE Computer Science > Weekend Revision (Chapter 4 - Paper 1) > Flashcards

Weekend Revision (Chapter 4 - Paper 1) Flashcards

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1
Q

What are the benefits of networking?

A

Transfer files quickly and easily.
Share peripherals and internet connections
Access files from any computer on a network
Control security, software updates and backups via a server
Communicate with each other via email and social media.

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2
Q

What is a LAN?

A

Covers a single site within a small geographical area.

All hardware is owned by the organisation using it

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3
Q

What is a WAN?

A

Connects LAN’s together over a larger geographical area.

Leased from telecommunication companies

Connected with telephone lines, fibre optic cables or satellite links.

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4
Q

Disadvantages of networking?

A

Increased security risk to data.
Malware and viruses can spread very easily between computers.
If a server fails, the computers connected to it may not work
Computers may run slower if there is many devices connected.

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5
Q

Disadvantages of networking?

A

Increased security risk to data.
Malware and viruses can spread very easily between computers.
If a server fails, the computers connected to it may not work
Computers may run slower if there is many devices connected.

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6
Q

What is bandwidth?

A

How much data that can be sent and received successfully in a specified period of time measured in bits per second.

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7
Q

What offers higher bandwidth, fiber optic or copper and why?

A

Fiber Optic due to it not being affected by radiation.

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8
Q

What offers higher bandwidth, wireless or wired?

A

Wired Connections.

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9
Q

What can increase the error rate?

A

Less reliable connections
Data must be resent until it arrives correctly.
Length of cable
Quality of signal.

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10
Q

What is latency?

A

Term given to delay between something being sent and received.

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11
Q

How may you encounter latency?

A

Not using switches appropriately.

Distance it must travel.

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12
Q

What are the advantages of the client server model?

A

Easier to manage security files.
Easier to make backups of all shared data
Easier to install software updates to all computers.

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13
Q

What are the disadvantages of client server model?

A

Can be expensive to set up and maintain.

Server is a single point of failure

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14
Q

What is unique about the Peer to Peer model?

A

A peer is a computer on a network and is equal to all other peers.

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15
Q

What are the advantages of Peer to Peer model?

A

Very easy to maintain
No dependency on a single computer
Cheaper to set up

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16
Q

What are the disadvantages of peer to peer model?

A

Network is less secure

Users need to manage own backups.

17
Q

What does every computer connecting to a network need?

A

Network Interface Card (NIC)

18
Q

What does a wireless access point do (WAP)?

A

Allows wireless enabled devices to connect to a network without cables.

19
Q

What does a switch do?

A

Sends data between computers on a LAN

Segments the network by forwarding traffic to the correct location.

20
Q

What does a router do?

A

Sends data between networks
Creates a WAN from a number of LAN’s
Uses internet protocol address to route traffic

21
Q

How does fibre optic transmit data?

A

Using light, covers much longer distances and higher bandwidth than copper.

22
Q

What is the largest example of a WAN?

A

The Internet

23
Q

What functions do web servers carry out?

A

Hosting websites

Dealing with client requests.

24
Q

What is the cloud?

A

A remote server which is accessed by the internet.

25
Q

What are the advantages of the cloud?

A

Access anywhere, anytime from any device.
Large storage capacity
Automatic backup

26
Q

What does the root server have?

A

Details of every website

27
Q

What is the internet?

A

Global collection of interconnected networks.

28
Q

What is the internet?

A

Global collection of interconnected networks.

29
Q

What is a network topology?

A

The arrangement of all the elements required to build a network.

30
Q

What is a star network?

A

Most popular type of wired network
Central Switch
All devices connect by own cable to switch.

31
Q

What is a full mesh topology?

A

Every device is connected to every other device.

If any connections break traffic can be directed via an alternate route.

More cabling and switches add to cost.

32
Q

What is partial mesh topology?

A

Multiple routes exist between devices, but every device is not connected to every other device.

Reduces amount of hardware compared to a full mesh network.

33
Q

Benefits of wifi?

A

Portable, no need for cables so its neater.

34
Q

Disadvantages of Wi-FI?

A

Security concerns

Lower bandwidth

35
Q

What is a protocol?

A

Set of rules which allow two devices to communicate.

36
Q

What is a layer?

A

One area of network functionality.

37
Q

Advantages of layering?

A

Reduces complexity of problem into smaller sub problems

Manufacture devices to operate on a particular layer

Products from different manufacturers will work together.

OCR GCSE Computer Science (32 decks)

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