TOPIC 5

Question 1

What is a computer network

Answer 1

A computer network is a set of computers which are linked together and are capable of sharing resorces, files, applications and communicate.

Question 2

Expand the acronym LAN

Answer 2

Local Area Network

Question 3

Define LAN

Answer 3

Lan covers a small geographical area such as a building and uses cables to connect

Question 4

Expand the acronym WAN

Answer 4

Wide Area Network

Question 5

Define WAN

Answer 5

Covers a large geographical area on a global scale, it can use fibre optic and satelitte for transmission

Question 6

State 3 advantages of networks

Answer 6

Expensive peripherals can be shared such as printers and scanners
Communication between devices and users is possible
Updates can be carried out at one time

Question 7

State 3 disadvantages of networks

Answer 7

Expensive to intall
Require specialist knowledge to operate
Potential for unauthorised users

Question 8

What is the world wide web

Answer 8

An applications which runs on the internet

Question 9

Define the internet

Answer 9

A network of interconnected networks which provides the communication links for data to be transferred between device

Question 10

Define the internet of things

Answer 10

Physical devices that are conected to the interney. Devices will be able to identify themselves to other devices. They use unique identifiers to communicate.

Question 11

State one advantage and one disadvantage of the internet of things

Answer 11

Advanvage - increased convenience for users as they can monitor and control devices remotely.

Disadvantage - increased potential for hackers to attempt to access devices in homes.

Question 12

Define intranet

Answer 12

A private network or website only available to members of an organisation. Not limited by geographical location.

Question 13

State 3 features of the intranet

Answer 13

• Not accessable by the public - only authorised users can log on and use it.
• Uses pages similar to those used on the internet which still need a browser to be viewed
  -Good way of sharing information across an organisation e.g. key dates, polocies or announcements.

Question 14

What are netowrk communication technologies

Answer 14

How fast data travels across a network is often referred to as bandwith. The wider the bandwith the more data can be carried.

Question 15

Define bandwith

Answer 15

Bandwith is the rate at which data can be transmitted ( on a network) in a given time. It is measured is bits per second (bps)

Question 16

How does bandwith affect the performance of a computer system

Answer 16

-High bandwith provides good quality output e.g. sound and picture while video calling or streaming online.
-Low bandwith may cause low quality output e.g. poor sound and pivutre or lagging while video calling or streaming online.

Question 17

Define Wi-Fi

Answer 17

Wi-Fi is a wireless technology which operates on radia frequency, has a medium range, and is affected by physical structures

Question 18

State three featrures of Wi-Fi

Answer 18

-Moniters smart devices at home
-connecting a smart TV to a home network
-Smart devices have a potential risk from hacking and are not always reliable

Question 19

State 2 advantages and 2 disadvantages of wifi

Answer 19

Advantages-relatively cheap
-Easy to connect to a range of enabled devices.
Disadavntages - Requires the computer/device to be in rnage of a wireless router
- Not as secure as wired connections

Question 20

State one adavnatage and one disadvantage of wifi over mobile data

Answer 20

Advantage - More reliable signal
Disadvantage - Signal strength may vary depending on proximity to router

Question 21

State one advanatage and one disadvantage of using wifi for video calls

Answer 21

Advantage - Higher bandwith meaning better quality video and sound
Disadvantage - Increased power consumption

Question 22

Why is security a potential problem while using wifi

Answer 22

Wi-Fi routers can be configured to require a password but open access wifi can cause security issues if users sahre important details

Question 23

Why is range a potential problem while using wifi

Answer 23

The further away that a device is from the router the worse the signal becomes. This might result in slow loading of web pages and even a black spot