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Q1) Terminal A is sending data to terminal B using a sliding window protocol with the window size equal to 5 and the maximum sequence number equal to 6 (sequence numbers begin with 0). We make the following assumptions: (1) use of go-back-n protocol, (2) A can send 5 packets before B receives the first one of the 5, (3) the retransmission timer at A is set to slightly more than the round-trip time. Suppose that the 3rd and 4th packets that A transmits are lost once and must be retransmitted. Show all packets that are sent by A by the time that B receives the 10th new packet transmitted by A. (Do not count retransmissions in arriving at the 10th "new" packet.)
Show practical and theoretical knowledge of LAN/Internet technologies
Suppose a subnet with prefix 128.119.40.128/26. Provide an example of one IP address (of the form xxx.xxx.xxx.xxx) which can be allocated to this network.
Illustrate how many protocols and protocol implementations are required to permit all nodes to communicate?
In terms of spectrum, does AT&T, Verizon, Sprint, etc...have access to amount of spectrum required to deliver VoIP services as well as Internet radio and TV?
Should the viewing or monitoring of social networking cites be considered an appropriate method for preliminary employment screening and continued employment with organizations?
You have been hired to give advice about use of cryptography to the developer of new two products within a company. Group A is developing a product which will encrypt each user's data before storing it on the hard disk,
How could you interconnect the two areas? Assuring that the network has immunity from the interference; re-evaluate your choice explaining the best medium(s) to utilize.
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?
Assess illustrate why technical means to guarantee data confidentiality depend upon trust.
The main memory of a computer is organized as 128 blocks, with a block size of 16 words. The cache has eight block frames. Illustrate direct mapping and address bits that recognize the tag field, the block number, and the word number.
Research three web browsers. For each browser, try to use it to at least access, if not actively work with, each of the following type of common web sites.
The security manager is to estimate principal physical characteristics used for biometric user authentication, concepts of enrollment.
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