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If each frame is 8,000 bits long, the data rate is 4 Mbps, the velocity is 200 meters/microsecond, and the distance is 10 km, what is the value of the frame transmission time, i.e., the time it takes to transmit a frame from when a device starts sending the first bit of the frame until it finishes sending the last bit?
A. 0.04 msB. 0.05 msC. 2 msD. 2.5 ms
Let N users participating in audio/video conference by using IP multicasting. How many distinct SSRCs are required?
CBC-pad is a block chiper mode of operation used in RC5 block cipher, but it could be used in any block cipher. That is, if the original plaintext is an integer multiple of the block size, why not refrain from padding?
Business processes and needs ultimately drive the type of cable media and hardware you select. What factors might determine how we select which ones are appropriate for our organization?
What technology and cost-of-use issues are related with a client- dominant local area network? Think about what happens as the network grows in size and users are storing and retrieving vast amounts of data.
What would be needed along with precautionary measures, and an overview of how the Internet works for the organization's office administration.
What size of packet will result in the last bit being transmitted just as the first bit of the packet arrives at the "far end" of the cable?
Determine the IP addresses of www.google.com and www.yahoo.com. Modify hosts file to map www.google.com to yahoo's IP address and try to do google search. Remove modification to host file and repeat.
As the data center manager for your organization, you have been asked by the CIO to provide a short presentation on the advantages and disadvantages of replacing old servers with new servers.
A crypto device encrypts each message into 20 bits of ciphertext.What is the entropy of the plaintext message? What is the entropy of the ciphertext message?
Write down some popular reconnaissance tools?
It asks ISPs to disclose actual identities of these people. Should the ISPs comply with this request. Describe your reasoning
Calculate RSA signature on long message by ?rst computing what the message equals mod n, for some ?xed n and then signing this computed value only. Why or why not?
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