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Given the narrow (usable) audio bandwidth of telephone transmission facility, a nominal SNR of 56dB (400,000), and a distortion level of <0.2%,
a. What is the theoretical maximum channel capacity (Kbps) of traditional telephone lines (POTS)?
b. What is the actual maximum channel capacity?
Fiber-optic line has reached capacity. What alternatives can the telephone company consider to increase capacity?
If poll bits are in the sixth frame, determine the N(R) count back from secondary after last frame? Suppose error-free operation.
Consider transferring a large file of L bytes from Host A to Host B. Assume a MSS of 1460 bytes. What is the maximum value of L such that the TCP sequence numbers are not exhausted?
Suppose a future where security countermeasures against DoS attacks are much more widely implemented than at present.
What kind of network crimes may use P2P networks? Find the most challenging crimes that could be based on P2P networks and write a report on how to do forensic investigations on these crimes.
What is the theoretical maximum channel capacity (Kbps) of traditional telephone lines (POTS)? Will that be the actual maximum channel capacity?
Describe at least three different networks (computer or data communications) which you access or interact with on an average day.
A frame rate of 30 fps, and 8 bits for quantisation of each pixel. What is the required bandwidth for the transmission of the uncompressed video stream?
You are allocated to work on project to create controller for new satellite. To save money, manager evaluates you could reuse about 90% of the software.
You are the Information Security Officer at a medium-sized company (1,500 employees). The CIO has asked you to explain why you recommend it is so important to secure your Windows.
Be sure to allow for spaces and punctuation between words. How long would it take to transmit the text over a T-1 line at 1.544Mbps and a fibre optic link at 2.488Gbps?
Consider the Stop-and-Wait ARQ. Drawing message sequence diagram illustrating that if network connection between sender and receiver can reorder messages,
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