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Q. Define layered network model?
- The OSI Reference Model is collection of seven layers every specifying particular network functions.
- The process of breaking up the functions or else tasks of networking into layers reduces complexity.
- Every layer provides a service to the layer above it in the protocol specification.
- Every layer communicates with the same layer's software or hardware on other computers.
- The lower 4 layers (network, transport, data link and physical -Layers 3, 4, 2, and 1) are concerned with the flow of data from end to end through the network.
- The upper top four layers of the OSI model (application and presentation and session-Layers 6, 7and 5) are orientated more toward services to the applications.
- Data is encapsulated with the essential protocol information as it moves down the layers before network transit.
Differentiate between Fast fading and Slow fading Fast fading refers to changes in signal strength among a transmitter and receiver as the distance among the two changes by a s
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modern technology in world of 21 century
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What is the implication of increasing and decreasing subnet Bits?
Fast Ethernet Operates at 100 Mbps faster speeds required for image processing, CAD, real-time audio and video No change in frame addressing, format or access method
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Q. Microwave Applications? - Unicasting - one-to-one communication among sender and receiver - Cellular phones - Satellite networks - Wireless LANs
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