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Question (a) A CRC is constructed to generate a 4-bit FCS for an 11-bit message. The divisor polynomial is X4 + X3 + 1
(i) Encode the data bit sequence 00111011001 using polynomial division and give the code word.
(ii) Assume that 7th MSB in the data bit sequence above gets corrupted during transmission, show how the detection algorithm detects the error.
Question (b) What is the difference between Synchronous TDM and Statistical TDM?
(c) In respect to HDLC:
(i) State the three data transfer modes of operation.(ii) Give the structure of generic HDLC frame.(iii) Explain why HDLC uses 'bit stuffing'.
Question (d) With the aid of sketches, explain the difference between the following two transmission modes used with optical fibre:
(i) Graded-index Multi-mode and
(ii) Mono-mode.
which security protocols are predominantly used in web-based e-commerce
Problem a) Give the destination IP address, upper layer protocol, TTL in decimal and header checksum in hexadecimal; the source port number and the destination port number in deci
state the fundamental principles of 3gpp security
Question 1: Why do we need a Law of Contract? a Explanation Reasons to have a law of contract b Explain the close procurement project process - Explanation (causes,
Question (a) Consider that you enter the subsequent URL in the address bar of a popular web client and that both the server and client accepts HTTP version 1.1. i. What can be
Mapping between a hardware address and a protocol address is known Address Resolution. A router or host uses address resolution when it requires to transmit a packet to another dev
CARRIER SENSE MULTIPLE ACCESS (CSMA) There is no central access management when computers transfer on Ethernet. For this solution the Ethernet employs CSMA to coordinate tran
Discuss how developers should apply the following countermeasures to improve the security of their code:
QUESTION: a) Explain four issues that are generally addressed in the Needs Analysis phase in the building-block approach to network design. b) Sketch a typical hybrid star-b
MAC Address The address for a machine as it is identified at the Media Access Control (MAC) layer in the network structure. MAC address is generally stored in ROM on the n
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