Question 1
(a) Define information transmission.
(b) D ifferentiate between:
- Internet and intranet;
- LAN and WAN.
(c) List four devices used in a LAN environment.
Observation
The question tested the knowledge of the candidates in the definition of information transmission and networking terms. The Chief \examiner reported that most of the candidates were able to give the definition of the terms listed.
The expected answer is:
- Definition of information transmission
Information transmission is the act of sending and receiving/ transfer of/ exchange of information/ message from one a person/place to another through a medium
OR
Information transmission is the exchange of information in any form (voice, data, text and images) from a sender to a receiver(s) over a medium (air, cable, water, etc ) using natural, or man-made equipment or tools.
- Difference between:
- Internet and Intranet
Internet |
Intranet |
A network of computers connected globally |
A computer networks within an organization |
A public network |
A private network |
Network of networks |
A single network |
Information is broad and unlimited |
Information is limited to the organisation’s needs |
Internet is not owned by anyone |
Intranet is owned by an organisation |
It can be accessed by anyone |
It can only be accessed by employees and members of the organisation |
It is less secured and not safe |
It is often firewalled, restricted and considered secured and safe |
Unlimited number of users |
Has limited number of users as designed by the organisation |
Support various services and protocols such as; http, ftp, smtp, gopher, telnet, irc, |
Support limited services of the organisation, such as collaboration, shared calendar, training, Video and Audio Conferencing |
High network traffic |
Low network traffic |
- LAN and WAN
Local Area Network (LAN) is a network of computers that covers a small
geographical area while Wide Area Network (WAN) is a network that spans a large
geographical location across states, regions and continents.
- Devices used in a LAN environment
- Hub
- Switch
- Server
- Bridge
- Connectors
- Bluetooth Radio
- Wireless Adapters
- Routers
- Repeater
- LAN Card/ NIC (Network Interface Card)
- LAN Extender
- Access points
- Printer
- Smart Devices
- Mobile Phone
- Scanner
- Digital camera
- Workstation/Computer/ Laptop/Desktop