Computer Networks Answers

Differentiate echo services of TCP and UDP .

Discuss about the different types of socket calls using in TCP &UDP.

One method of classifying the various instances of malware is by using the primary trait that the malware possesses. Identify four primary traits and give two examples of malware that have the primary trait infection

As ICT/CSS student,what can you say about the use of VMware in these trying times?

If you will become a Systems Administrator someday,how will you secure the server for your clients?

Listdown at least 5 important roles of a server in business,education,governance and communications.

In the Virtual Circuit (VC) Subnet (refer the course material “Session 20 Network Layer Functionalities” in Moodle) every circuit will have a VC ID and the routing table includes the VC IDs to manage the circuits. But, the problem with VC ID is it is local to the system; VC IDs are assigned by the host system itself without the knowledge of VC IDs assigned by the other hosts. Because of which there will be a clash of VC IDs at the router. Understanding the ambiguity, the router then changes one of the VC IDs to a unique ID at router level and proceeds with data transfer (refer Slide No. 12 of the course material). Over and above the data transfer, this is the additional responsibility for a router which creates hiccups in the data communication. Question: Design a network system where VC IDs will be assigned uniquely which avoids VC ID collision at routers. Since such a system avoids the VC ID collision at the router, it should definitely save router's time and should improve performance of router.

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?

c. Under what circumstances would an additional job be started? Explain your answer.

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.

c.)Under what circumstances would an additional job be started? Explain your answer.

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.

B)What are the minimum and maximum number of devices that may be idle because of this policy?