Define the term enterprise network, Computer Network Security

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a) Define the term "Enterprise Network".

b) Briefly discuss the similarity and differences between a switch and a router.

c) A company XYZ has been renting the 1st Floor of a building for the past few years. The 1st Floor consists of 4 rooms and the company has 4 Departments (Sales, Marketing, Design and Management). Company XYZ has now decided to set-up a network. The following user requirements have been identified:

a. Sales Department (20 Users)

Network Usage: Email per user: 10 Kb/s, Database queries per user: 1500 b/s, Internet per user: 0.5 Kb/s

b. Marketing Department (10 Users)

Network Usage: Email per user: 0.1 Mb/s, Database queries per user: 1 Kb/s, Internet per user: 2 Kb/s

c. Design Department (5 Users)

Network Usage: Email per user: 500 b/s, File Transfer per user: 5 Kb/s, Internet per user: 2 Kb/s

d. Management Department (15 Users)

Network Usage: Email per user: 2 Kb/s, Internet per user: 2 Kb/s

Note that 10% network overhead and a safety margin of 60% for future expansion has not been accounted for.

Given that the company has 3 servers: An Email Server which is found in the Sales Department, a Database Server which is also found in the Sales Department and a FTP server found in the Design Department, carry out the following:

a) Give a logical network design for company XYZ.

b) Justify the types of medium to be used as links between each department.

c) Justify the network equipments that used to building the network.

d) Specify the Internet Connection Speed that would be needed from an ISP.

d) Using an example, explain what is meant by Access, Distribution and Core Layers of a Geographical Scope.


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