Computer Networks Answers

You are a Technology Specialist in your organisation. You have been tasked to run a workshop on network system design specifically looking into the requirements and constraints. You have decided to approach the task by studying the components that make up a network system and then the relationship between network systems and related areas. Thus far, you have realised that you will base your workshop on the exhibit extracted from Serpanos and Wolf (2011). Exhibit: Requirements and constraints for network system design 

Identify a suitable network scenario/case that can be used to explain and discuss the relationship of concepts in the exhibit. Ensure that you provide details of the following aspects of the scenario: • Description of the scenario; • Why the scenario is considered a network system.

•The tertiary institution consists of the Head Office in Cape Town and one campus each in Durban, Johannesburg and Cape Town.

• Each campus consists of:

o Four lecturing halls; o A library;

o Four computer/electronic device facilities;

o IT Support office.

•All client computers run Windows 7 or latest operating system, Microsoft Office 2013 suite, Microsoft Project and Microsoft Visio 2013.

• The network is centrally managed at the Head Office and all campuses are linked to the Head Office.

• Each campus is Wi-Fi enabled providing wireless connection to staff and students.

Q.4.1 Design an implementable routing and bridging solution for the network. Your solution must address the following design and operation aspect of all routers.

Q.4.1.1 Functionality of the network layer. (5) Q.4.1.2 Design and implementation of data plane. (5)

Q.4.1.3 Design and implementation of control plane. (5)

Q.4.1.4 Interconnection of networks using bridging systems. (5)

The following are noted about the institution:

• The tertiary institution consists of the Head Office in Cape Town and one campus each in Durban, Johannesburg and Cape Town.

• Each campus consists of:

o Four lecturing halls;

o A library;

o Four computer/electronic device facilities; o IT Support office.

• All client computers run Windows 7 or latest operating system, Microsoft Office 2013 suite, Microsoft Project and Microsoft Visio 2013.

• The network is centrally managed at the Head Office and all campuses are linked to the Head Office.

• Each campus is Wi-Fi enabled providing wireless connection to staff and students.

Q.4.1 Design an implementable routing and bridging solution for the network. Your

solution must address the following design and operation aspect of all routers.

Q.4.1.1 Functionality of the network layer.

Q.4.1.2 Design and implementation of data plane.

Q.4.2 Draw a detail diagram showing the design and implementation of Q.4.1 above.

A user’s laptop is shutting down unexpectedly. As a Network Technician, you discovered the “shutdowns” only happen when the laptop is moved from one room to another. You “reseat” the hard drive, memory, battery, and LCD cable, but the laptop continues to shut down. Explain what could be the cause of this issue, and how would you resolve it.

Given the following Hamming-encoded codeword received at receiver as "01100001111" having 7 bits of data, 4 bits of error correction code. Determine if the data has been received correctly, and if it is incorrect (assuming that no more than a single bit has changed):

Let G(x) = x5 + x4 + x2 + 1 be the polynomial generator(pattern), T = 101000110101110 be the message received by the destination node. Would the receiver accept the message? Why?