Weekend Revision (Chapter 4 - Paper 1)

Question 1

What are the benefits of networking?

Answer 1

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.

Question 2

What is a LAN?

Answer 2

Covers a single site within a small geographical area.

All hardware is owned by the organisation using it

Question 3

What is a WAN?

Answer 3

Connects LAN’s together over a larger geographical area.

Leased from telecommunication companies

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

Question 4

Disadvantages of networking?

Answer 4

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.

Question 5

Disadvantages of networking?

Answer 5

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.

Question 6

What is bandwidth?

Answer 6

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

Question 7

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

Answer 7

Fiber Optic due to it not being affected by radiation.

Question 8

What offers higher bandwidth, wireless or wired?

Answer 8

Wired Connections.

Question 9

What can increase the error rate?

Answer 9

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

Question 10

What is latency?

Answer 10

Term given to delay between something being sent and received.

Question 11

How may you encounter latency?

Answer 11

Not using switches appropriately.

Distance it must travel.

Question 12

What are the advantages of the client server model?

Answer 12

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

Question 13

What are the disadvantages of client server model?

Answer 13

Can be expensive to set up and maintain.

Server is a single point of failure

Question 14

What is unique about the Peer to Peer model?

Answer 14

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

Question 15

What are the advantages of Peer to Peer model?

Answer 15

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

Question 16

What are the disadvantages of peer to peer model?

Answer 16

Network is less secure

Users need to manage own backups.

Question 17

What does every computer connecting to a network need?

Answer 17

Network Interface Card (NIC)

Question 18

What does a wireless access point do (WAP)?

Answer 18

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

Question 19

What does a switch do?

Answer 19

Sends data between computers on a LAN

Segments the network by forwarding traffic to the correct location.

Question 20

What does a router do?

Answer 20

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

Question 21

How does fibre optic transmit data?

Answer 21

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

Question 22

What is the largest example of a WAN?

Answer 22

The Internet

Question 23

What functions do web servers carry out?

Answer 23

Hosting websites

Dealing with client requests.

Question 24

What is the cloud?

Answer 24

A remote server which is accessed by the internet.

Question 25

What are the advantages of the cloud?

Answer 25

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

Question 26

What does the root server have?

Answer 26

Details of every website

Question 27

What is the internet?

Answer 27

Global collection of interconnected networks.

Question 28

What is the internet?

Answer 28

Global collection of interconnected networks.

Question 29

What is a network topology?

Answer 29

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

Question 30

What is a star network?

Answer 30

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

Question 31

What is a full mesh topology?

Answer 31

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.

Question 32

What is partial mesh topology?

Answer 32

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.

Question 33

Benefits of wifi?

Answer 33

Portable, no need for cables so its neater.

Question 34

Disadvantages of Wi-FI?

Answer 34

Security concerns

Lower bandwidth

Question 35

What is a protocol?

Answer 35

Set of rules which allow two devices to communicate.

Question 36

What is a layer?

Answer 36

One area of network functionality.

Question 37

Advantages of layering?

Answer 37

Reduces complexity of problem into smaller sub problems

Manufacture devices to operate on a particular layer

Products from different manufacturers will work together.