(a) Define information transmission
(bi) Differentiate between internet and intranet
(ii) Differentiate between LAN and WAN
(c) List four devices used in a LAN environment
Explanation
(a) Information transmission is the exchange of information in any form ( e.g voice, data, text and images) over a medium (air, cable ,water ,) using natural, or man- made equipment or tools.
(bi)
| Internet | Intranet |
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The Internet is a huge network that connects computer networks across the world. It uses the Internet protocol suite (TCP/IP) |
An intranet is a network connection similar to the internet but it is limited by the users within an organization. It can include several LANs or leased lines in the wide-area network. |
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The internet enables the exchange of a huge amount of (unlimited) information between connected users. |
It enables the exchange of limited information between limited and authorized people of a particular firm. |
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It provides access to all types of information. |
The intranet has all the information, resources, programs, events, and more related to a company. |
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It is a public network. |
It is a private network |
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The internet has multiple users. Anyone can access it. |
The intranet has limited users. Only certain people with login credentials are authorized to use Intranet. |
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The Internet consists of several intranets. |
It is like a part of the Internet. |
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It is a wide and insecure network. The Internet is a global network with low privacy. There is the possibility of leaks of data and information. |
An intranet is a limited and secure network. It has a pre-installed firewall that protects the privacy of the firm against unauthorized access or hackers. |
(bii)
| LAN | WAN |
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LAN stands for Local Area Network |
WAN stands for Wide Area Network. |
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LAN's ownership is private. |
WAN's ownership can be private or public. |
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The speed of LAN is high(more than WAN) |
The speed of WAN is slower than LAN. |
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The propagation delay is short in LAN. |
Whereas the propagation delay in WAN is long(longer than LAN) |
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LAN operates on the principle of broadcasting. |
WAN works on the principle of point-to-point. |
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LANs technologies are used like ethernet and tokens. |
WAN technologies are used like Frame Relay and X.25 for connectivity for longer distances. |
(c) - Hub
- Bridge
- Layer 2 Switch
- Layer 2 Switch
- Router