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Suppose computers on your home network are connected to a single hub (a), but now you need to expand the network. You purchase another hub (b). Assuming you use a straight-through (not a crossover) cable, what port on hub A will you use to connect it to hub b?
What possible IEEE 802.11 amendments could be used for the new system? What are the pros and cons of each amendment? Choose an amendment to implement and explain your choice.
Consider improved version of Vigenere cipher, where instead of using multiple shift ciphers, multiple mono-alphabetic substitution ciphers are used.
Explain which concepts are the most significant to consider when designing information security policies and procedures.
Assume that N Ethernet stations, all trying to send at same time, need N/2 slot times to sort out who transmits next. Describe available bandwidth as function of N.
Using the frequency definition of bandwidth, what should the bandwidth of 10 Mbps Ethernet link be if the signal-to-noise ratio is 20 dB?
Include the devices and type of network circuits you would use. You will need to make some assumptions, so be sure to document your assumptions and explain why you have designed the network in this way.
It is essential to encrypt it, by using solutions like PGP (Pretty Good Privacy), S/MIME (Secure Multi-Purpose Internet Message Exchange), and steganography. Research these different mechanisms.
Assume that sender sends silence suppressed RTP stream of G.711 audio to receiver (G.711 is the name of standard for 64Kbps PCM). Outline algorithm which uses sequence numbers and time stamps of RTP packets to find out beginning of new talk spurt?
Explain these generic and VoIP specific issues. What are the risks? How are these threats being addressed? What can you do as a manager?
You are provided with some continuous signals for the number of sensors on a sensor array. The signals detect various categories of signals.
You have been asked in order to produce a list of the MAC addresses and the corresponding IP addresses and computer names within your network. Suggest at least two methods in order to complete this task.
After reading about attacks on servers like to ones used in one of company's departments, the CIO has asked you to come up with a report as to what.
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