Computer studies analysis of questions and answers

made up of continuous varied wave form.
it is transmitted over telephone line.
a codec converts an analog signal to digital for transmission via a digital medium

Digital

made up of non continuous discrete wave form computers
a modem converts a digital signal to analog for transmission over the analog media

(c) Name two types of coaxial cables (2mks)

thin net
thick net

(d) (i) Distinguish between microwave and satellite transmissions. (2mks)

Microwave transmission consists of point to point transmissions meaning a signal is divided through a focused beam from transmitter to receiver while satellite is usually launched into speck

(ii) Give an example of internet protocol (1mk)

ICPIP [Internet Control Message Protocol]
TCP [Transmission Control Protocol]
IP [Internet Protocol]

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Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.

12/1/2021

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Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.

Intranet involves interconnection of computers within an organisation, in intranet it's easier to monitor the access and sharing of files since the users working in the organisation can be assigned accounts and passwords which will enable them access the files they are authorised to access unlike the internet where many people can access whatever is stored in the organisation website.

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What is meant by Data Communication Equipment?

4/1/2021

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What is meant by Data Communication Equipment?

Any equipment/device that passes on a network signal.

(b) List six examples of Data Communication Equipment.

Modem, Bridges, Gateway, Repeaters, Brouters, Routers, Cables, MC, hubs/Switches, codec, computer, multiplexer/demltiplexer, Nanostations, phone.

What is meant by Data Communication Equipment?

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Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.

4/1/2021

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Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.

Encryption.
Firewalls.
User profiles/passwords/user.
Limit the number of log-in attempts.
Audit trail/tracking.
Physical protection of computers.

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Explain how data in a computer system is secured using:

3/1/2021

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Explain how data in a computer system is secured using:

(i) password;
(ii) user access level.
(b) State three characteristics of a suitable password.
(c) State two characteristics of a computer that is infected by computer viruses.
(d)(i) The figure below shows how data is transmitted through a public telephone line.

Name A, B, C and D.
(ii) State two advantages of using fibre optic cables over satellite in data communication.

(a) (i) Password

It’s a string of characters entered by a user to verify his or her identity.
The system compares the code against a stored list of authorized users. If the user is legitimate then the system allows the user access.

(ii) User level access

It’s a mechanism for limiting access to certain items of information or to certain control based on user identities and their membership in various predefined groups.

(b) Characteristics of a suitable password

Easy to remember
Should have appropriate length
Hard/difficult to guess

(c)

Slow or not booting.
Files not opening.
Functionality of some application failing.
Files or data getting lost.

(d) (i) Naming the parts

A — Sender/terminal
B — Digital waveform
C-Modem
D — Analogue waveform.

(ii) Advantages of fibre optic over satellite

Cost.
Supports broadband communication.
Signal is directed and therefore e secure.
It’s minimal to raise interference e.g. noise.

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Define data communication.

3/1/2021

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Define data communication.

Data communication -It is a term that describes the transmitting and receiving of data and/or signals data over communication links.

(b) State two characteristics of an effective data communication system.

Characteristics of an effective data communication system

Accurate
Secure
Timely

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What is meant by data communication in a computer network?

26/12/2020

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What is meant by data communication in a computer network?

Movement of computer information from one point to another by means of electrical or optional transmission system. Such systems are often referred to as data communication networks.

coaxial cables

State what is meant by each of the following transmission media and give one advantage and one disadvantage for each.

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COMPUTER STUDIES QUESTIONS WITH ANSWERS

The diagram below shows four common network topologies A, B, C

The diagram below shows four common network topologies A, B, C

What is a master file?

What is a reference file?

Four stages in data processing cycle

List three advantages and three disadvantages of fibre optic cable and Name two types of coaxial cables

(a) List three advantages and three disadvantages of fibre optic cable (6mks)
Advantages

Disadvantages

(b) Describe the following signals and state where each is applied in network communication. (4mks)
Analog

Digital

(c) Name two types of coaxial cables (2mks)

(d) (i) Distinguish between microwave and satellite transmissions. (2mks)

(ii) Give an example of internet protocol (1mk)

Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.

Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.

What is meant by Data Communication Equipment?

What is meant by Data Communication Equipment?

(b) List six examples of Data Communication Equipment.

Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.

Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.

Explain how data in a computer system is secured using:

Explain how data in a computer system is secured using:

Define data communication.

Define data communication.

(b) State two characteristics of an effective data communication system.

What is meant by data communication in a computer network?

What is meant by data communication in a computer network?

State what is meant by each of the following transmission media and give one advantage and one disadvantage for each.

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COMPUTER STUDIES QUESTIONS WITH ANSWERS

​The diagram below shows four common network topologies A, B, C

(a) List three advantages and three disadvantages of fibre optic cable (6mks) Advantages

​Disadvantages

​(b) Describe the following signals and state where each is applied in network communication. (4mks) Analog

​Digital

​(c) Name two types of coaxial cables (2mks)

(d) (i) Distinguish between microwave and satellite transmissions. (2mks)

​(ii) Give an example of internet protocol (1mk)

Explain why an intranet is a more secure way to share files within an organisation compared to the Internet.

What is meant by Data Communication Equipment?

​(b) List six examples of Data Communication Equipment.

Pesa Mingi company has offices in Nairobi and Kampala connected in a network. The management is convinced that someone is illegally gaining access to the data in their computers. State three ways in which the company can overcome this problem.

Explain how data in a computer system is secured using:

Define data communication.

(b) State two characteristics of an effective data communication system.

​What is meant by data communication in a computer network?

State what is meant by each of the following transmission media and give one advantage and one disadvantage for each.

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Archives

The diagram below shows four common network topologies A, B, C

(a) List three advantages and three disadvantages of fibre optic cable (6mks)
Advantages

Disadvantages

(b) Describe the following signals and state where each is applied in network communication. (4mks)
Analog

Digital

(c) Name two types of coaxial cables (2mks)

(ii) Give an example of internet protocol (1mk)

(b) List six examples of Data Communication Equipment.

What is meant by data communication in a computer network?