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QUESTION
(a) FTP is a protocol used for the delivery of files across networks. Explain how FTP works (support your answer with a diagram).
(b) How does TCP perform the given functions?
i. Flow Control. ii. Congestion Control. iii. Error/loss recovery
(c) Using state diagrams, illustrate the following:
i. Lost Data ii. Premature Timeout
(d) Explain the differences between IMAP and POP3 protocols used for the functioning of E-Mail systems.
(e) For the network shown, use the Distance Vector Routing Algorithm to determine the least cost route from A to all other nodes.
Question: (a) African governments are slowly shifting to more transparent ICT regulations. However, but limited spectrum availability remains a key barrier to sustaining lon
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
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a t
Question: (a) Your office administrator is being trained to take server backups. Which authorization model could be ideal for this situation: MAC, DAC or RBAC? Justify your a
COMPONENTS OF AN INFORMATION SYSTEM The components of an information system are software, data, hardware, people, procedures and Networks. These 6 components are critical to ena
Network security is an issue for companies regardless of whether they participate in electronic commerce; however, since most organizations have a Web site that allows some interac
What key which if used to encrypt the ciphertext again would give back the plaintext (i.e. key is a weak key)? Define a formula for identifying weak keys for the cipher below (
Proof that the sender forwards the message. It also prohibits the author of the code from falsely denying that he forward the message. This is achieved by record using the exact ti
Explain how can we achieved privacy in an e-mail system. The full form of PEM is Privacy Enhanced Mail: PEM is the internet Privacy Enhanced Mail standard adopted
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
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