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(a) Describe how CSMA/CD operates and explain how Ethernet deals with collisions.
(b) Describe how the subsequent protocols work:
i. ARPii. DHCPiii. DNSiv. SMTP
(c) The IEEE 802.11x standard is popular in extending wired networks.
i. Outline popular flavours of this wireless standard. Illustrate on the operating frequency, range and speed of each flavour.
ii. What are the modes of operation of this standard and describe the difference between them.
iii. Mention one security issue with this wireless technology and illustrate how this issue can be addressed.
(d) Given the provided received codeword C and the generator polynomial G.
Evaluate if an error has taken place during transmission.
C: 110110011
G: x3 + x
I have an assignment of Computer Security to submit. Will you guys help me making my assignment???
Convert (111011)2 to ( )10
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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 X 4 + X 3 + 1 (i) Encode the data bit sequence 00111011001 using po
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