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State two ways in which one can create a password which cannot be easily accessed by hackers.15/1/2021 State two ways in which one can create a password which cannot be easily accessed by hackers.
Password which cannot be hacked.
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Explain three ways in which an operating system provides data security in a computer system14/1/2021 Explain three ways in which an operating system provides data security in a computer system
Access control:
(b)State two instances where observation is not a viable method of gathering data during system analysis stage.
I. repeater
I. Identify the component labelled P.
Pesa Tele 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.
A computer technician found it necessary to disable a firewall when working on a computer system. State two reasons that may have necessitated disabling of the firewall.
When firewall is disabled
State two ways in which hardware failure is a threat to data security.
Peter has installed internet in his home computer in order to use it for browsing. State three ways in which he would prevent viruses from infecting the computer. (3 marks)
A worker is unable to travel to the office but may still be able to do the office work through telecommuting.
(a) Explain why the worker may use each of the following:
(i) email; (ii) fax; (iii) digital camera; (iv) firewall. (b) The worker needs to make regular backups of documents sent to the office. State three reasons for this. (c) Explain two benefits that the employer will get by allowing this worker to do the office work through telecommuting.
RESPONSES
(a) E-mail: - used to send and receive electronic documents to/from the office.
Receive instructions from the supervisor or co-workers. Fax: - Used to send documents which are in non-electronic format Digital camera - Used to capture images in picture form/video conferencing. Firewall - Used to prevent intrusion to the home computer because telecommuting involves connection to the internet. (b) Communication systems may fail/communication channel may fail.
State three techniques used by a network administrator to detect and prevent computer crimes.5/1/2021 State three techniques used by a network administrator to detect and prevent computer crimes.
(b) A company in town wishes to link its offices together. The linking may be through wireless or fibre optic network media.
(i) State two benefits that the company would gain from the use of metropolitan area network (MAN). (ii) State three advantages of using wireless over fibre optic network media. (iii) State two limitations of wireless communication. (iv) State two transmission media used in wireless transmission. (c) State three ways in which computer virus infection can be prevented other than through restricting the usage of removable storage media. RESPONSES
(a) Audit trail
A student saved a document in a diskette. Later on, the student found that the diskette could not open arid therefore the work got lost.Give three precautions the student should have taken to ensure the work was not lost.
One way in which an organisation enforces security of its computer systems is by restricting the use of removable media such as floppy disks and flash memories. Give two reasons for this.
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.
State two measures that can be put in place to control piracy of software.
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
Copyright laws are laws granting authors the exclusive privilege to produce, distribute, perform or display their creative works. It is a legal framework for protecting the works such as book publishing, motion-picture production and recording. State two challenges that are posed to these laws by ICT’.
Give two reasons why the use of finger prints and voice input can be used as reliable forms of security in computer systems.
They cannot be:
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