Question

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1. Compare Local Area Network (LAN), Metropolitan Area Network (MAN) & Wide Area Network (WAN).
2. Refer to Attachment.
3. Who discovered/Created internet & in which year?
4. Differentiate between WIMAX & WIFI
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Class: 8
Chapter: 01 ; Let Us Explore- Computer Network
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Answer 1

Answer:

LAN stands for local area network. It is a group of network devices that allow communication between various connected devices. Private ownership has control over the local area network rather than the public. LAN has a short propagation delay than MAN as well as WAN. It covers the smaller area such as colleges, schools, hospitals, and so on.

MAN stands for metropolitan area network. It covers the larger area than LAN such as small towns, cities, etc. MAN connects two or more computers that reside within the same or completely different cities. MAN is expensive and should or might not be owned by one organization.

WAN stands for wide area network. It covers a large area than LAN as well as a MAN such as country/continent etc. WAN is expensive and should or might not be owned by one organization. PSTN or satellite medium is used for wide area networks.

Answer 2

Given:-

1. Compare Local Area Network (LAN), Metropolitan Area Network (MAN) & Wide Area Network (WAN).

2. Who discovered/Created internet & in which year?

3. Differentiate between WIMAX & WIFI

Answers:-

1. A LAN (local area network) is a group of computers and network devices connected together, usually within the same building. ... A WAN (wide area network), in comparison to a MAN, is not restricted to a geographical location, although it might be confined within the bounds of a state or country.

2. The online world then took on a more recognizable form in 1990, when computer scientist Tim Berners-Lee invented the World Wide Web.

3. WiMax uses licensed or unlicensed spectrum to deliver connection to network. WiMax handle a larger inter-operable network. WiMax can be used to provide internet services such as mobile data and WiFi spots.

Differences between WIFI and WiMax:

$\bf\ WiFi :$

• Wifi is defined under IEEE 802.11x standards where x stands for various WiFi versions.
• WiFi is for LAN (Local Area Network) applications.
• WiFi does not guarantee any Quality of Service (Qos).
• WiFi network range is around 100 meters.
• WiFi MAC layer uses CSMA/CA protocol which is not connection oriented.
• WiFi is short range technology.
• WiFi connection can transmit upto 54 mbps.

$\bf\ WiMax:$

• WiMax is defined under IEEE 802.16y standards where y stands for various WiMax versions.
• WiMax is for MAN (Metropolitan Area Network) applications.
• WiMax guarantee Quality of Service (Qos).
• WiMax network can reach about 50-90 km.
• WiMax is connection oriented in nature.
• WiMax is long range technology.
• WiMax connection can transmit upto 70 mbps.