May not have space for cables to be installed

Employees and visitors can move around the building without disconnecting

Adding new users just means giving out the SSID and password

• file deletion
• file copying
• file renaming
• file retrieval
• file closing
• file reading

• A computer is an electronic device that operates (works) under the control of programs stored in its own memory unit
• An electronic device that accepts data, as input and transforms it under the influence of a set of special instructions called programs, to produce the desired output (referred to as information)

(i) State the name of this protocol.   HTTPS 

(ii) Identify how this protocol changes the data to transmit the data securely.

• It encrypts it
• It applies encryption algorithm
• It applies an encryption key

Modulation refers to the process of converting a digital signal to analog signal at the transmission end while demodulation is to converting analog signal to digital signal at the receiving end

Dual input of data

• Two inputs are compared by the system and any discrepancies are reported (and not stored.)
• Data input once, either printed out or checked on the screen and  errors corrected

 Rules are given to the processor

• Only accept A, B, C, D, E, F, G i.e Any other input rejected.

Drop-down list/radio buttons

• Provides only valid inputs, so no other validation is required

• a repeater is a two-port device that amplifies a signal from one port to another
• a switch is a multiport device that uses a table of addresses to send a signal through the correct port

 Control unit

• Passive matrix create images by scanning the entire screen whereas active matrix displays are made using thin-film transistors technology(TFT)
• active matrix  display has a higher resolution compared to passive matrix
• Active matrix consume more energy than passive matrix

• Radio waves
• Microwaves
• Infrared waves

• 4 (four)

• Continual decrease in computer size
• Improved speed and power of processing
• Decrease in computer physical size and its related facilities cost

• The preparation of a system proposal which lists the problem definition, objectives of the study, terms of reference of study, constraints, and expected benefits of the new system, in light of the user requirements

• A compiled program will only execute on a processor of specific type/family/with same instruction set
• A program run using an interpreter can execute on a computer with any type of processor

Bridge: Joins together two networks that use the same base protocols.

Hub: Copies all packets of data to all devices on the network.

Router: Stores the addresses of computers on the network and transfers data between devices.

Switch : Analyses each data packet and sends it to the computer it was intended for.

• Is where People are manipulated to divulge confidential information

• devices are automatically detected and configured when initially attached
• Impossible to connect device incorrectly/connector only fits one way
• has become the industry standard
• supports multiple data transmission speeds
• lots of support base for USB software developers
• supported by many operating systems
• backward compatible
• faster transmission compared to wireless

• Thesaurus - Is a feature in a word processor that suggest words with the similar or opposite meaning to the one selected
• Comments: a feature in a word processor that allows a user to attach a remark about the selection

• Installing the latest versions of antivirus software
• Avoiding downloads from untrusted sites
• Scanning removable storage media for viruses before use
• Scanning attachments for viruses before opening or downloading

Answer question 16 and any other three questions from this section in the spaces provided.

16. a) With the aid of a flow chart, describe a loop control structure as used in programming. [4]  

A control structure that allows statement(s) to be repeatedly executed until a certain condition is met                                                                                                      2mks

NB. Accept any other looping construct