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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.
on LAN,where are IP datagrams transported?
Question: a) Explain what the following intermediate systems are and how they work? i. Repeater ii. Bridge b) A service is formally specified by a set of primitives (op
A Network is described as a system for connecting computers using a single transmission technology. The computers can interact with each other in a network. They can receive an
what is guided media or unguided media
Encryption Key Size When using ciphers, the size of crypto variable or key is quite important as the strength of many encryption applications and cryptosystems were measured by
Innovative nature of triple key management The triple key management scheme provides secure services by combining different techniques whic contribute to the security and priv
Problem a) Give three reasons why traditional Network Design approach is less appropriate for many of today's networks? b) The network requires of users are organized into m
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, listin
(a) Describe DES encryption with a block diagram and brief steps. (b) How does triple DES improve security. What is the effective key length of triple DES? How can 3DES be compa
Question 1: (a) Differentiate between symmetric and asymmetric encryption system. (b) Describe how a digital signature is created. (c) Explain briefly what SSL (secure so
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