- Extra information can be added to digital signals so that errors can either be detected or
corrected.
- Digital data tends not to degrade over time
- Processing of digital information is relatively easy, either in real-time or non-real-time A
single type of media can be used to store many different types of information (such as
video, speech, audio and computer data can be stored on tape, hard-disk or DVD/CDROM).
- A digital system has a more dependable response, whereas an analogue system’s
accuracy depends on parameters such as component tolerance, temperature, power supply
variations, and so on. Analogue systems thus produce a variable response and no two
analogue systems are identical.
- Digital systems arc more adaptable and can be reprogrammed with software, Analogue
systems normally require ft change of hardware for any functional changes.
Kavungya answered the question on May 14, 2019 at 09:26
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a) Mr. Shadrack Kalamba a technician with Icon Systems Technology Ltd. is setting up a local
area network (LAN) for a client
Required:
i) Identify four network devices...
(Solved)
a) Mr. Shadrack Kalamba a technician with Icon Systems Technology Ltd. is setting up a local
area network (LAN) for a client
Required:
i) Identify four network devices that he would use in setting up the LAN.
ii) State six advantages of a LAN.
b) Expound the following acronyms as used in computing:
i) TCP.
ii) FTP.
iii) HTTP.
iv) HTML.
v) WWW.
vi) IP.
Date posted:
May 14, 2019
.
Answers (1)
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Transmission of data over computer networks raises certain security concerns.
Identify two possible causes of data insecurity and two mitigations that could be taken to secure
data.
(Solved)
Transmission of data over computer networks raises certain security concerns.
Identify two possible causes of data insecurity and two mitigations that could be taken to secure
data.
Date posted:
May 14, 2019
.
Answers (1)
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a) Define the term “world wide web”
b) The surface simplicity of the website is in fact that many individual protocols can be
contained within a single...
(Solved)
a) Define the term “world wide web”
b) The surface simplicity of the website is in fact that many individual protocols can be
contained within a single website.
Required
i) Define the term “Protocol”
ii) Describe any four protocols used in the World Wide Web.
iii) Outline four ways of accessing web pages.
Date posted:
May 14, 2019
.
Answers (1)
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Distinguish between synchronous and asynchronous data transmission modes.
(Solved)
Distinguish between synchronous and asynchronous data transmission modes.
Date posted:
May 14, 2019
.
Answers (1)
-
i) Briefly explain the graphical user interface (GUI)
ii) State two reasons why a GUI is considered easier to use than a command line interface
(Solved)
i) Briefly explain the graphical user interface (GUI)
ii) State two reasons why a GUI is considered easier to use than a command line interface
Date posted:
May 14, 2019
.
Answers (1)
-
Joyce Kubo is a Marketing Manager with Kay Ltd She intends to use her home computer to
connect to the company's network in order to analyse...
(Solved)
Joyce Kubo is a Marketing Manager with Kay Ltd She intends to use her home computer to
connect to the company's network in order to analyse sales data but suspects that her home
computer might.be infected by computer viruses.
Required:
i) Illustrate any four unusual events that could alert Joyce Kubo of possible computer virus
infection.
ii) Suppose after completing her analysis, Joyce Kubo prepares her results in PDF file format
and posts them to the company's website.
Briefly explain two reasons why Joyce Kubo could prefer the PDF file format.
iii) Suppose Joyce Kubo intends to display her results using a presentation package.
Describe four precautions which Joyce Kubo should observe when putting text in
presentation.
Date posted:
May 14, 2019
.
Answers (1)
-
(i) Define the term "network firewall
(ii) Describe three advantages and three disadvantages of adopting hardware firewall.
(Solved)
(i) Define the term "network firewall
(ii) Describe three advantages and three disadvantages of adopting hardware firewall.
Date posted:
May 14, 2019
.
Answers (1)
-
a) Distinguish between data privacy and data security,
b) Outline three countermeasures to information security threats,
(Solved)
a) Distinguish between data privacy and data security,
b) Outline three countermeasures to information security threats,
Date posted:
May 14, 2019
.
Answers (1)
-
(i) Define the term "logical topology" as used in computer networks.
(i!) Explain two types of logical topologies.
(Solved)
(i) Define the term "logical topology" as used in computer networks.
(i!) Explain two types of logical topologies.
Date posted:
May 14, 2019
.
Answers (1)
-
Briefly discuss four advantages of the virtual private network.
(Solved)
Briefly discuss four advantages of the virtual private network.
Date posted:
May 14, 2019
.
Answers (1)
-
(i)Define the term "protocol" in the context of computer networks.
(ii)Illustrate two types of wireless media necessary when setting up a network.
(Solved)
(i)Define the term "protocol" in the context of computer networks.
(ii)Illustrate two types of wireless media necessary when setting up a network.
Date posted:
May 14, 2019
.
Answers (1)
-
Explain three modes of data communication and their practical use.
(Solved)
Explain three modes of data communication and their practical use.
Date posted:
May 14, 2019
.
Answers (1)
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(i) Define the term "mobile computing”
(ii) Outline five limitations of mobile computing devices
(Solved)
(i) Define the term "mobile computing”
(ii) Outline five limitations of mobile computing devices
Date posted:
May 14, 2019
.
Answers (1)
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Analyse the following modes of communication with reference to-cost, speed of transmission
and reliability:
(i) Serial mode.
(ii) Parallel mode.
(Solved)
Analyse the following modes of communication with reference to-cost, speed of transmission
and reliability:
(i) Serial mode.
(ii) Parallel mode.
Date posted:
May 14, 2019
.
Answers (1)
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Information systems controls consist of all methods, policies and organizational procedures that
ensure the safety of the organization’s assets, the accuracy and reliability of its accounting
records...
(Solved)
Information systems controls consist of all methods, policies and organizational procedures that
ensure the safety of the organization’s assets, the accuracy and reliability of its accounting
records and operational adherence to management standards.
Required:
Describe five types of general information systems controls.
Date posted:
May 14, 2019
.
Answers (1)
-
Differentiate between information systems (IS) and information technology (IT).
(Solved)
Differentiate between information systems (IS) and information technology (IT).
Date posted:
May 14, 2019
.
Answers (1)
-
Identify three vital services which information systems can provide to a business organization.
(Solved)
Identify three vital services which information systems can provide to a business organization.
Date posted:
May 14, 2019
.
Answers (1)
-
a) Identify three roles of- information systems in-an. organisation.
b) State and explain the components of an information system.
(Solved)
a) Identify three roles of- information systems in-an. organisation.
b) State and explain the components of an information system.
Date posted:
May 14, 2019
.
Answers (1)
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Explain four security concerns that personal computer users face in an organization.
(Solved)
Explain four security concerns that personal computer users face in an organization.
Date posted:
May 14, 2019
.
Answers (1)
-
Briefly explain four authentication techniques that could enhance security of information
systems in an organisation.
(Solved)
Briefly explain four authentication techniques that could enhance security of information
systems in an organisation.
Date posted:
May 14, 2019
.
Answers (1)