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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
(a) Describe RSA encryption. (b) For an RSA encryption the values of the primes are: p=29, q=31. select e=11, evaluate the public and private keys. (c) How can RSA be used fo
Question 1: (a) Explain the operation of the "matchmaker" middle agent. (b) Describe why broker middle agents are more efficient in terms of the time taken for a service to
QUESTION (a) Which PKI (Public Key Infrastructure) model is typically favored by business organization? (b) Give one possible use of the "extensions" field of an X.509 certi
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which is best algorithm
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