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Question
(a) Name 3 popular electronic mail access protocols?
(b)
i. What is DNS?
ii. Briefly, describe what it does and how it works?
iii. Why does DNS use a distributed approach as opposed to a single server?
(c) HTTP supports both non-persistent and persistent connections.
i. Describe each type of connection and state which HTTP protocol version supports each type?
ii. How and where is the type of connection specified in the HTTP protocol?
(d) Assume that a new application layer protocol is developed for video conferencing application. Which transport layer protocol do you think will be used and why?
(e) FTP is said to have an "out-of-band" connection. Explain what it means?
Question 1: (a) (i) Radio waves are subject to several propagation problems. Name any three of them. (ii) A Wi-Fi receiver requires a signal power of 50mW to operate correc
How to check Network working
Problem (a) Give two reasons for companies to implement security measures. (b) What is the regulatory expectation regarding i. healthcare information, ii. financial
ROUTING TABLES AND ADDRESS MASKS Additional information is saved in routing table. Destination is kept as network address. Next hop is saved as IP address of router. Address m
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 gi
Digital Signatures Digital Signatures are encrypted messages which can be proven mathematically to be authentic. These are created in response to rising requirement to verify in
Question: (a) Give 2 benefits of using IPsec. (b) IPSec uses two protocol for security: Authentication Header protocol (AH) and the Encapsulated Security Header Protocol (
Question: a) You are using Active Directory Users under Windows Server 2003 and Computers to configure user objects in your domain, and you are able to change the address and
Question (a) Estimate the average throughput between two hosts given that the RTT for a 100 bytes ICMP request-reply is 1 millisecond and that for a 1500 bytes is 2 millisecon
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