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Problem 1
Solve the following Caesar cipher by showing your working: EM KIUM EM AIE EM KWVYCMZML
Problem 2
Compare and contrast between block and stream ciphers, listing the relative advantages and disadvantages.
Problem 3
(a) What the 3 main steps in DES encryption?
(b) Explain how triple DES works.
(c) Explain the term steganography and give 4 examples.
Problem 4
Critically assess the given statement:
"The longer the key, the stronger the encryption." Give examples and justifications.
QUESTION: a) Below is a capture of an Ethernet II frame which has an IPv4 packet and a segment. Provide the source MAC address in hexadecimal; the source IP address, the length
Question: a) There are two basic approaches to dealing with errors in the presence of pipelining. One way is Go-Back-N and the other strategy is Selective Repeat. i. Explain
An injunction to 'think ethically' about a situation is not helpful. Perhaps if one has a background in moral philosophy this would work, but usually both students and IT professio
What is one-time pad for encryption? Describe how it offers both Confusion and Diffusion. Using the letter encoding discussed in class (along with one-time
Belady's Anomaly Also known FIFO anomaly. Generally, on raising the number of frames given to a process' virtual storage, the program execution is faster, because lesser page
a) determine the RTT (round trip time) between a client requesting a web page of 1024 bytes in size from an internal web server on a 100 Base-T Ethernet. Assume a one-way propagati
(a) Draw the waveform for an asynchronous transmission with the given specifications: 8 data bits with value 11010001 (LSB listed first here), one parity bit (even), one star
a) Explain the contents of the Cost Assessment. b) Various Documents are needed for Configuration Management. State three of them, and describe their importance. c) Given tha
homlox prv hetorx orxolxpersorx
Scenario: A network with individual hosts (really, virtual machines) can run HTTP (web) servers that are available to the outside. (Here, available means the ability to read and wr
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