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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
Computer networks is a complex subject due to the given reasons: MANY DIFFERENT TECHNOLOGIES EXIST: The first reason for the complexity of networks is that there are s
Internet Protocol IP Gives computer-to-computer communication. Host and receiver addresses are computers. This is also known machine-to-machine communication.
The project will be involving a design and a report of which explain the simulation and how it functions. The aim of the project is to help the administrators and staff at the war
(a) Using Fermat's theorem, find 3 201 mod 11. (b) Explain how the Diffie-Hellman key agreement protocol works and what its purpose and main properties are. Consider a Dif
COLLISION DETECTION The signals from two devices will interfere with each other and the overlapping of frames is known a collision. It does not cause to the hardware but data
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Example : UCSF Medical Center In the year 2002, the University of California, San Francisco (UCSF) Medical Center received an email message from someone who claimed to be a doct
Hybrid Cryptography Systems This makes use of different cryptography systems. Except digital certificates, pure asymmetric key encryption is not used extensively. Asymmetric enc
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