Question: Answer the following Computer Networking Questions: Describe two problems (for each layer) addressed by the: physical layer, link layer, and network layer. For the link

Answer the following Computer Networking Questions:

  1. Describe two problems (for each layer) addressed by the:
  • physical layer,
  • link layer, and
  • network layer.
  1. For the link layer and for the network layer, list two pieces of information found in the datagram (packet) that are used to solve problems for that layer.

  1. Nyqusit data rate determines the maximum channel capacity.
  • State Nyqusit formula used to determine the maximum channel capacity.
  • Given a transmission wire with a bandwidth of 8000Hz and 256 distinct levels, determine the channels maximum capacity.
  • A fibre optic cable can transmit 200 Mbps (million bits per second), assuming a bandwidth of 10 Bbps, how many signalling levels are required.
  1. Given the signal to noise ratio, Shannon's result can be used to determine the maximum channel capacity.
  • State Shannon's formula.
  • What is the capacity of a channel where the SNR = 1000 and the bandwidth is 8000Hz?
  • If the bandwidth is 10Mbps and the channel capacity is 200Mbps, what is the SNR?

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