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SIT202 Computer Networks

tag 0 Download 7 Pages / 1,717 Words tag 24-09-2021

Questions:

Question 1

a) Forouzan identifies one of the advantages of protocol layering as allowing intermediate devices to be less complex by not requiring all layers Given that modern routers, switches, and other intermediate devices often provide web interfaces for administering/configuring the device:
  1. i) Explain why all layers are required to be present for such devices; and
  2. ii) Briefly discuss whether Forouzan’s identified advantage is still relevant.
b) In the Week 1 Class Slides in CloudDeakin, on page 49 is a figure illustrating the encapsulation and decapsulation of data as it moves from source host to destination host. The router is illustrated as having (i) two physical layers and (ii) two data link layers. Explain why these are required and describe how they would be used when a datagram passes through the router.

Question 2

a) Consider creating a new type of network where the network cable (copper) has a large bandwidth and will be shared between several users.
  1. Briefly describe how this network could be constructed either as a low-pass channel using TDM, or as several bandpass channels using FDM.
  2. Identify one advantage and one disadvantage for each approach (note that it is possible that an advantage for one approach could be a disadvantage of the other approach).
b) You are employed by an organisation that stores and processes large volumes of highly sensitive data. After moving to new premises (a new building), you discover that the wired network between the data storage units and computation units is much higher latency than previously. Your colleague suggests using an ad-hoc wireless network between the two units will resolve the matter.
  1. Briefly explain two potential problems with this approach.
  2. Considering each of the four components of latency (propagation time, transmission time, queuing time, and processing delay), identify and explain one possible cause and how to resolve it.

Question 3

a) The ARP protocol is used to identify an Ethernet address for a given IP address and the information discovered using this protocol is temporarily kept by a device in its “ARP cache”. Consider eliminating the ARP protocol by having devices periodically broadcast their Ethernet and IP addresses instead, and explain the advantages and disadvantages of this approach.
 
b) Referring to the Week 3 slides and training videos for examples of CRC and Internet checksum calculations:
  1. Demonstrate the generation of the CRC code for the following input:
  2. Demonstrate the generation of the 16-bit Internet checksum for the following input:

Question 4

a) Consider configuring an IP address on a router and a switch.
  1. Give an example of the commands used to configure an IP address on both a router and a switch. Use your own IP address and subnet mask (do not re-use those that appear on the practical task).
  2. Briefly explain why the switch’s IP address is not applied to a physical interface.
b) Briefly explain the problem with the telnet tool (Week 2 practical discussion question 5) and identify an alternative tool and explain how it solves/eliminates this problem.
 
c) Briefly discuss the need for the IPCP protocol and describe what it is used for.
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My Assignment Help (2021) SIT202 Computer Networks [Online]. Available from: https://myassignmenthelp.com/free-samples/sit202-computer-networks/advantage-and-disadvantage-of-networking.html
[Accessed 28 January 2023].

My Assignment Help. 'SIT202 Computer Networks' (My Assignment Help, 2021) <https://myassignmenthelp.com/free-samples/sit202-computer-networks/advantage-and-disadvantage-of-networking.html> accessed 28 January 2023.

My Assignment Help. SIT202 Computer Networks [Internet]. My Assignment Help. 2021 [cited 28 January 2023]. Available from: https://myassignmenthelp.com/free-samples/sit202-computer-networks/advantage-and-disadvantage-of-networking.html.


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