Chapter 4, Networks and the effects of using them Video Solutions, Cambridge IGCSE Information and Communication Technology

Problem 1

A company is setting up a video conference.
a Name three computer hardware devices they would need.
[3]
b The company could have set up a web-conference rather than a video-conference.
Describe what is meant by a web-conference.
[4]

Cambridge IGCSE Information and Communication Technology (0417) Paper 11 Q8, May/June 2017

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Problem 2

Both Wi-Fi and Bluetooth can be used to enable devices to communicate wirelessly.
Describe the differences in how Bluetooth and Wi-Fi both operate.
[6]

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02:12

Problem 3

Hubs and switches are both used to enable devices to communicate with each other in a network.
a Describe the differences and similarities in the use of hubs and switches in a network.
[4]
b A bridge is another device used in network connectivity. Describe the function of a bridge.
[2]
c Routers are used to allow local area networks to connect to external networks. Local area network ' A ' is in Europe and local area network ' B ' is in India. Describe how routers are used to enable a computer on network ' $A$ ' to send data to a computer on network ' B '.
[3]
d Describe the main differences between routers and bridges.
[3]

Shelby Mohamed

Numerade Educator

Problem 4

Authentication is an important part of network security. Explain the meaning of the following three types of authentication. In each case, also give an example of its use.
a Zero login
b Physical token
c Electronic token
[9]

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Problem 5

Six features of network devices are given in the table below. For each feature, tick $(\Omega)$ the appropriate box to indicate whether it refers to a router, hub or switch.
$$
\begin{array}{|l|l|l|l|}
\hline \text { Feature } & \begin{array}{c}
\text { Router } \\
{[\Omega]}
\end{array} & \begin{array}{c}
\text { Switch } \\
(\Omega)
\end{array} & \begin{array}{c}
\text { Hub } \\
{[\Omega]}
\end{array} \\
\hline \begin{array}{l}
\text { Used to connect devices together to form a local area } \\
\text { network (LAN] }
\end{array} & & & \\
\hline \begin{array}{l}
\text { The destination MAC address is looked up before the data } \\
\text { packet is sent to the correct device }
\end{array} & & & \\
\hline \text { Used to connect LANs to other, external networks } & & & \\
\hline \begin{array}{l}
\text { Uses both MAC and IP addresses to enable data packets to } \\
\text { be sent to the correct device on another network }
\end{array} & & & \\
\hline \text { All data packets are sent to all the devices on the network } & & & \\
\hline \begin{array}{l}
\text { Data packets are sent only to a specific device on the same } \\
\text { network }
\end{array} & & \\
\hline
\end{array}
$$

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Problem 6

a Describe what is meant by a virus.
b Describe three of the features you would expect to find in any anti-virus software.

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Problem 7

a Explain how magnetic stripe cards could be used to control the entry and exit to a security building.
b Describe how these magnetic stripe cards could be improved to increase the security of the building.

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Problem 8

Seven descriptions are shown on the left and ten computer terms are shown on the right.
By drawing arrows, connect each description to the correct computer term.
Form of authentication in the form of
hardware devices; uses periodically
changing random numbers to log in to a
secure system
Type of network that covers a huge
geographical area, such as a country or
different continent

Devices used to connect two LANs together
that use the same protocols, but cannot
communicate outside the two LANs

Authentication software installed on a

user’s smartphone that generates a one-
time password

Type of login authentication that relies on
biometrics and behavioural patterns

Devices that connect computers together
to form a LAN; directs data packets to a
specific device or computer only

Hardware needed to connect a device to a
network; a MAC address is hardwired or
hard-coded into the device at manufacture

Password

Zero login

Physical token

Wide area network

Internet

Network interface
card
Hub

Bridge

Electronic token

Switch

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Problem 9

a Explain what is meant by cloud computing.
b Give three advantages of storing data on the cloud.
c Give three disadvantages of storing data on the cloud.

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Problem 10

Name each of the six network devices labelled ‘A’ to ‘F’ in the
diagrams below:
a.figure cant copy
b.figure cant copy
c.figure cant copy

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