State two advantages of making payments through a mobile phone.
Advantages of mobile phone in payments
State the role of each of the following data communication devices:repeater and router
(b) Figure 3 shows a network based on the bus topology.
(i) Identify the component labelled P.
(ii) State the function of the component labelled P.
(c) Students of Neema Secondary School formed an environmental club with a goal of taking part in environmental conservation activities. Outline three ways in which they can use the internet to achieve this goal.
(d) (i) A company has three branches A, B and C where A is the headquarter. The local area network (LAN) at A is directly connected to the LAN at B and directly to the LAN at C. Explain two benefits of having the LAN at B also directly connected to the LAN at C. (4 marks)
(ii) State three ways in which a company can protect its computer network from hackers.
(a) (i) Repeater
(ii) Terminator in a backbone is used to prevent data signal from bouncing back/absorb signals.
(c) Use of internet in environmental conservation club
State three ways in which mobile phones have affected money transactions in the country.
A computer user ¡s unable to retrieve a file stored in a server in an organisation. State three reasons why the user would need to contact the network administrator.
A computer user is unable to retrieve a file stored in a server in an organisation. State three reasons why the user would need to contact the network administrator.
Role of network administrator
a) Distinguish between Computer Aided Instruction (CAI) and Computer Aided Learning (CAL). (4 marks)
b)(i) State four activities that may be carried out when disposing off an old system in an organization. (4 marks)
ii) State four ways of getting user specifications during systems design. (4 marks)
State three hardware devices that may be required to connect a computer to an existing local area network.
A) State three hardware devices that may be required to connect a computer to an existing local area network. (3 marks)
B) A publisher intends to use a desktop publishing programme to create a publication which is to have many graphics. State three ways in which the graphics may be acquired for this purpose. (3 marks)
C) Interpret each of the following spreadsheet formula:
(i) = countif(D2:D9, “>“&B4) (2 marks)
(ii) sumif(B3 :B 11, “4M”, D3 :D11) (2 marks)
(i) = Countif (D2 : D9, “>“ & B4)
(D) The following are the fields of products table in a database created to store records of products manufactured in a factory:
II. State three properties to be put in place during table design to ensure integrity of the data entered. (3 marks)
I) Product Number — Number/Autonumber/Text
State four outcomes that may result from using incorrect requirement specifications during systems development.
A) State four outcomes that may result from using incorrect requirement specifications during systems development. (4 marks)
B) A school opted to use direct change over approach when installing a new system.