BAHRIA COLLEGE KARACHI NORE-I
Sub: Computer Science Topic: Computer Networks Student Name: ______________________________
Q1.
A small company that develops games software employs several programmers and administrative staff. The company has installed a Local Area Network (LAN).
The programmers sometimes use stand-alone computers instead of the networked ones.
(a) Explain one benefit to the programmers of using stand-alone computers. [2]
____________________________________________________________________________________________
____________________________________________________________________________________________
(b) Describe two benefits to the company of using the LAN. [4]
Benefit 1_____________________________________________________________________________________
____________________________________________________________________________________________
Benefit 2 ____________________________________________________________________________________
____________________________________________________________________________________________
A laptop is to be connected to the LAN using a wireless connection.
(c) (i) State two items of hardware required to connect the laptop to the LAN. [2]
Item 1______________________________________________________________________________________
Item 2______________________________________________________________________________________
(ii) State one item of software required for this purpose. [1]
___________________________________________________________________________________________
(iii) Explain the function of this software. [2]
___________________________________________________________________________________________
___________________________________________________________________________________________
Q2. Most laptop computers have networking capability.
(a) Describe two other desirable features you would look for when choosing a laptop computer.
Feature 1____________________________________________________________________________________
Feature 2____________________________________________________________________________________
(b) Describe two advantages of using broadband to connect to the Internet rather than using dial-up
1. __________________________________________________________________________________________
2. __________________________________________________________________________________________
Q3 (a) A student is trying to find out information about cloud computers.
How could he use the Internet to find this information?
(b) Give two advantages of using the Internet to find information.
1. __________________________________________________________________________________________
2. __________________________________________________________________________________________
(c) Give two disadvantages of using the Internet to find information.
1. __________________________________________________________________________________________
2. __________________________________________________________________________________________
Q4 A college decides to use network computers with wireless capability.
Give one advantage and one disadvantage of using wireless systems.
Advantage:
____________________________________________________________________________________________
Disadvantage:
____________________________________________________________________________________________

BAHRIA COLLEGE KARACHI NORE-I
Sub: Computer Science Topic: Computer Networks Student Name: ______________________________
Q5 Define:
Protocols, Handshake, Bandwidth, Baud rate, upload time, download time, Internet, Intranet, www, URL, Topology, stand alone computer.
Q6 (a) Define Web browser.
(b) Write 5 features of a web browser.
(c) Write 5 examples of web browsers.
Q7 (a) Define Search engine.
(b) Write 4 examples of search engines.
Q8 (a) What does ISP stand for?
(b) Write any five services provided by ISPs.
________________________________________________________________________________________________

Sub: Computer Science
BAHRIA COLLEGE KARACHI NORE-I
Topic: Computer Networks Student Name: ______________________________
Answer 2 (a) Any two points from:
– consume very little power …
– … hence prolonging internal battery life
– run cool …
– … thus minimising problem of heat dissipation
– no processor fans needed …
– … therefore prolonging internal battery life
– light weight for easier portability [2]
(b) Any two advantages from:
(1 mark for advantage + 1 mark for expansion)
– very fast transfer/conncetion rate …
– … thus can download/upload files much faster
– always “on” (no need to dial up) …
– … thus don’t have to wait/have instant access to the Internet
– not metered …
– … thus it is possible to download large files without additional cost
– telephone lines not tied up whilst computer in use …
– … this is because broadband uses a wide bandwidth
– because of the high data transfer rate …
– … it is possible to do video conferencing or use VOIP systems
Answer3 (a) Any two points from:
– use a search engine …
– … and enter KEY words (e.g. CLOUD + COMPUTER) [2]

BAHRIA COLLEGE KARACHI NORE-I
Sub: Computer Science Topic: Computer Networks Student Name: ______________________________
(b) Any two advantages from:
– more likely to be up-to-date
– can contain multimedia files
– more information is available
– can find information anywhere (e.g. away from home)
– usually faster than looking through paper-based information (must be a comparison)
– easier to incorporate information into own work, projects, etc. [2]
Page 7 Mark Scheme: Teachers’ version Syllabus Paper
(c) Any two disadvantages from:
– not regulated/checked, therefore may be inaccurate/incorrect
– easy to get irrelevant information/sites/overabundance of info
– can download viruses, spyware, etc.
– risk of finding porn sites
– need to invest in computer system + broadband
– sometimes information is withdrawn and is lost from the Internet
Answer4 (a) Any two from:
– share resources (hardware and software)
– easier communications are possible
– possible to work from any work station and access files/data
– central data source
– easier to control/monitor what users are doing
– easier to ‘globally’ protect against unauthorised access [2]
(b) Any one advantage and any one disadvantage from:
Advantages
– no trailing wires (therefore safer, less expensive since no cables)
– allows users to work anywhere (portability)
– can set up network in places where cable runs are not possible (e.g. outside, historic buildings etc.)
Disadvantages
– limited range
– certain items (like filing cabinets) can block the signals
– possible to ‘tap’ into WiFi if it isn’t secure
– often slower data transfer rate than a wired system
– needs additional hardware
– number of access points need to match computers