Computer Networks Answers

Cite a situation in which you can apply the knowledge about configuring a static address

List down the difference between configuring static address and dynamic address.

Identify any two tasks that can be performed on computer network give

Task description

Required network application/ software

Benefits

Concerns and / or risks of each task

List down the difference between configuring static address and dynamic address?

4 Consider a system with 14 dedicated devices of the same type. All jobs currently running on this system require a maximum of five devices to complete their execution but they each run for long periods of time with just three devices and request the remaining two only at the very end of the run. Assume that the job stream is endless and that your operating system’s device allocation policy is a very conservative one: No job will be started unless all the required drives have been allocated to it for the entire duration of its run. a. What is the maximum number of jobs that can be active at once? b. What are the minimum and maximum number of devices that may be idle because of this policy? Under what circumstances would an additional job be started?

A campus wireless installation project costs GH¢ 36,000 and is expected to generate cash inflows of 11,200 annually for five years. Calculate the IRR.

 Your company has been presented with a new proposal to develop a new school management system. The cost of the project development is $500,000. The probability of successful development is projected to be 70%. If the development is unsuccessful, the project will be terminated. If it is successful, the developer must then decide whether to begin developing a completely new school management system or modify an existing school management system. If the demand for the new school management system is high, the incremental revenue for the school management system is $1,200,000, and the incremental revenue for the modified school management system is $850,000. If the demand is low, the incremental revenue for the new school management system is $700,000, and the incremental revenue for the modified school management system is $720,000.

Supply of laptops to a customer and maintenance agreement of three years costs GH¢ 16,000.  The annual cash flows are: 8,000, 7,000 and 6,000. If , what is the IRR (). 

You are the IT Project Manager of a company and there are two projects being considered for selection. Project-I: Developing a website is being considered against Project-II: Developing a Library software. The initial project costs and other details are given below:

Project-I: , , CF: 5,000, 10,000, 10,000, 3,000, 2,000, Salvage Value=1,000,

Project-II: , , CF: 20,000, 10,000, 5,000, 3,000, 2,000, Salvage Value=2,000,

Using the NPV, which project should be selected and why?

Write a fruitful function sum_to(n) that returns the sum of all integer numbers up to and

including n. So sum_to(10) would be 1+2+3. . . +10 which would return the value 55.

You are a network engineer. You have been asked to plan and implement a network for

two buildings. Each building has two floors. Each building has its own router, they are 

600 meters away from each other.

The first building contains the following Computer Labs:

1- Logic Lab (First Floor). The lab has 88 PCs, 4 switches.

a. Name one of the PCs net1.

2- C++ Lab (Second Floor). The lab has 135 PCs, 6 switches.

a. Name one of the PCs net2.

3- Media Lab (Second Floor). The lab has 590 PCs, 20 switches.

a. Name one of the PCs net3.

b. This LAB is data intensive, use the best possible cabling bandwidth.

4- Use the following Network address 174.15.0.0 255.255.128.0 for the three labs 

(Subnets).

5- The PCs in each network should obtain their IPs automatically from their DHCP 

server.

6- The DHCP Server should be assigned with a static IP address.

 Each LAN has its own DHCP Server. It should provide enough number of 

dynamic addresses for all PCs. It should also provide other information like 

DGW and DNS details.