Section B :
1.
(a) hardware security, software security/data security, network security
(b) (i) Data Backup is a program of file duplication. Backups of data applications are
necessary so that they can be recovered in case of an emergency.
(ii) Cryptography is a process of hiding information by altering the actual
information into different representation.
(iii) An antivirus program protects a computer against viruses by identifying and
removing any computer.
2. ( a ) An operating system is a set of programs that coordinates all the activities
among the computer hardware devices. In most cases, the operating system
is installed and resides on the computer’s hard disk. Examples, Linux,
Windows XP, Unix etc
3. ( a ) Lan, Man and Wan
( b ) Router/ modem
4. ( a ) A = UTP / Cat 5 / Cat 6. B = fibre optic cable
( b ) i. Client/Server
ii. P2P
( c )
Web browsing
Email
File transfer
Newsgroup&Message boards
Mailing lists
Chat rooms
Instant messaging.
5. ( a ) camera, scanner, microphone, video camera, speaker, computer, etc.
( b ) sound editor / sound forge / graphic editor / adobe photoshop / paint / ms power
point / toolbook etc.
6. ( a ) X = Green , Y = White/Orange
( b ) Primary Storage & Secondary Storage
( c ) Pendrive, cd,RAM, ROM, diskette etc
7. ( a ) 7210 = 01001000 2
( b ) 011110112 = 123 10
( c ) 7AB716 = 0111101010110111 2
( d ) 01101100101001002 = 6CA4 16
( e ) E516 = 229 10
.(b) Two functions of component A.( CPU)
• Interprets and carries out basic instructions that operate a computer
• Control unit directs and coordinates operations in computer
• Arithmetic logic unit (ALU) performs arithmetic, comparison, and logical operations
(c) Differentiate between component B (INPUT) and component C(OUTPUT)
d) Bus Topology and Star Topology.
Question 2
E-Business
E-business or electronic business refers to conducting business transactions on the internet, not only limited to buying and selling but also servicing customers and collaborating with business partners.
E-business supports many types of business transactions, including online shopping, selling and renting. Users can browse the website and choose from the list of items or services to buy. Payment is usually via credit card.
Online Education
With a network connections, online education is made possible. Students at any location around the world can participate in an online classroom, download tutorial questions and submit their assignments.
E-Banking
Electronic banking is the most popular banking facility nowadays. It handles all types of banking transactions like account management, fund transfer and payments primarily over the internet.
User can pay bills, check the account balance and transfer money to other parties, using e-banking facilities twenty four hours a day and seven days a week.
With e-banking, most of the transactions can be done at home or from the office, thus users save time on traveling and queuing at the bank counters.
Long Distance Communication
Long distance communication is made easy via network availability. Communication is possible via voice, text or video. The cost of having this type of communication is cheaper than making a normal phone call and definitely faster and more effective than corresponding via letters of fax.
Question 3
a. An antivirus program protects a computer against viruses by Identifying and removing any computer viruses found in the computer memory, on storage media or incoming e-mail files
b. Examples of antivirus software are McAfee VirusScan, Norton AntiVirus, Trend Micro
PC-cillin, Doctor Solomon, AVG, Avira and others related answer
c. - Computer shut down automatically.
- Computer hang / slow.
- File name changed or deleted
- Funny messages.
- Taking up space of Hard disk.
- Hard disk damaged.
- Any relevant answers.
d. - Avoid downloading files from other sources.
- Scan before downloading or copying files from other sources.
- Avoid going to unsolicited website.
- Do not open email from unknown senders.
- Any relevant answers.