Computer Networks Answers

As we know that network is a set of connected devices and Whenever we have multiple devices, we have the problem of how to connect them to make one-to-one communication possible. What methods/techniques are used to solve this problem.

Answer the following questions in your own words:

1. What do you understand by The Hidden Node Problem? Describe 2 different spatial configurations which exemplify this issue.
2. What is the 4B/5B encoding for the 3-byte (ASCII) string “Sun”?
3. What is the 16-bit internet checksum for the 3-byte binary message 00110001 00110010 00110011?
4. Suppose a message is 11011000. What is the CRC checksum using the polynomial corresponding to 1011 to give a 3-bit answer? (Show the solution steps, not just the answer).
5. What is Time Domain Reflectometry?

Research on the Internet and discuss the following:

•  Mobile Telephones have evolved in a number of ways, from 1G to 4G. Compare them in terms of Standards used and Features.

Using one of the referenced website articles discuss how operating systems Switch Between Processes and/or how the OS decides to stop one process and start another.

b) You have sub-netted your class C network 200.138.1.0/?? with a subnet mask of 255.255.255.224. Please list the following: number of networks, number of hosts per network, the full range of the first three networks, and the usable address range from those first three networks. Additionally, identify the broadcast addresses for each network.

a) You have sub-netted your class C network 192.168.1.0/?? with a subnet mask of 255.255.255.240. Please list the following: number of networks, number of hosts per network, the full range of the first three networks, and the usable address range from those first three networks. Additionally, identify the broadcast addresses for each network.

Consider an Mary QAM constellation with symbol spacing of the

constituent PAM constellations given by, unit pulse energy,

transmitted over an AWGN channel with PSD No 2 No2 per IQI,Q

channels What is the probability of error given the transmission

of a constellation point on the edge of the square constellation

but not a corner point

• What are the various problems that could arise in Non-Return to Zero (NRZ) encoding if a continuous stream of 0s or 1s is sent?

 Instead of writing an essay, try writing in bulleted form, briefly explaining what you understand from the findings.

Note any areas where you may want or need some further explanation. Ask questions of your fellow classmates. Revisit the Discussion Forum often, responding to at least three other classmates and responding to anyone who responded to your original post.

Compare ATM (Asynchronous Transfer Mode) and ETHERNET on the following aspects:

Bandwidth

Scalability

Interoperability

Quality of Service

Note any areas where you may want or need some further explanation. Ask questions of your fellow classmates.

Cite a situation in which you can apply the knowledge of creating modular jack cable