Computer Networks Answers

Congestion in a network may occur if the load on the network is greater than the capacity of the network. The congestion control scheme tries to bring the network back to an operating state, while a congestion avoidance scheme tries to keep the network at an optimal state. The instant at which a congestion control scheme is called, depends on the amount of memory available in the routers whereas, the point at which a congestion avoidance scheme is invoked, is independent of the memory size. A congestion avoidance scheme may continuously oscillate slightly around its goal without significant degradation in performance. However, the congestion control scheme tries to minimize the chances of going above the limit.

As a network administrator, in your opinion, which of following technique will be more suitable for a WAN?

(1)   Congestion Avoidance

(2)   Congestion Control

URGENTLY HELP PLEASE, I need to answer this wireless and mobile network question within the 3 hours. 

From an architectural point of view, what network components should be added to a GSM system and which new connections should be made between the various network components so that it has a GPRS support?

Task 1 (2 pt): A program that converts a temperature in F that the user provides and returns the equivalent temperature in C.  Hint: Google is your friend! Given F, solve for C.  This program does not require an if structure and has a straight forward input – process – output structure!

Mobile phones are considered to be the most common communication devices in history, mobile phones are not only used for casual greetings but also, sending and receiving important data such as, social security numbers, bank account details and passwords. Public key cryptography is a proven security solution, which can be used to secure the mobile communications. ABC company have been proposed; server-based framework public key cryptography solution to secure the mobile communications. Third party servers were used to check the certificates, authenticating the communicating parties, key distribution, etc. The proposed framework consists two type of ciphers; i) Public key Cryptosystem (RSA) and, ii) decrypt messages through the digital signature. There are four scenarios to be considered order security requirement of integrity and confidentiality; based on that scenarios answer the following questions:

a.  Scenario 1: Show the security design and calculation steps for digital signature by figure and explain on how to calculate?

b. Scenario 2: Based on Scenario 1, show the security design sequences and calculation steps for one-way hash algorithm by figure and provide justification on the usage of one-way hash algorithm? Then, list the Properties of Hash Algorithm?

c.  Scenario 3: Based on Scenario1, show the security design sequences and calculation steps for RSA by figure and explain how to use it to distribute the keys?

d. Scenario4: Based on Scenario 3, show the security design sequences and calculation steps for private key cipher by figure and explain how to use it for encrypt and decrypt messages?

A multinational company opens multiple branches all over that Pakistan. If you are hired to design the networking from the company, what type of network you will select? What type of network topology will be suitable for the linking different branches or different department inside the single company branch? List down the network equipment you may require during this implementation. 

A multinational company opens multiple branches all over that Pakistan. If you are hired to design the networking from the company, what type of network you will select? What type of network topology will be suitable for the linking different branches or different department inside the single company branch? List down the network equipment you may require during this implementation. 

ahmad Is looking for a computer application to get a better sense of the weekly and monthly sales patterns at his flower shop what type of program will help him best

Do we ever need to be concerned about becoming addicted to any Internet activities? Find one example in a news or journal article of a person who was “addicted” to using a social networking site or other online activity. 

Digital social networks (such as Facebook and Twitter) are very popular with individuals. Identify the reason that why individuals will prefer Digital social network over casual social networking or vice versa. List down mental health problems that may arises with excessive use of digital social networking Do we ever need to be concerned about becoming addicted to any Internet activities? Find one example in a news or journal article of a person who was “addicted” to using a social networking site or other online activity