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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
QUESTION a) "Two of the key attributes of an enterprise network is that it have to be multi-platform and multisite." Decribe what you understand by this statement. b) A
In this section, you should create a program that emulates a GBN node. Two GBN nodes will be running to send packets to each other through the UDP protocol. For emulation purpose,
Sometimes the special character may see in data and as a part of data they will be misinterpreted as packet data. The solution to this cause is Byte stuffing. In general to
the meaning Digital Signatures
why is it that sometime we put password in our account to login or signup and it would not work?
Types of IDSs and Detection Methods IDSs operate as network based, host based, or application based systems and focused on protecting network information assets. All the IDSs us
Question: (a) A Wireless Mesh Network (WMN) is a communications network made up of radio nodes organized in a mesh topology. i. Describe the function of a TAP in WMNs. ii.
Discuss how developers should apply the following countermeasures to improve the security of their code:
What is the use of it
STAR TOPOLOGY In this topology, all devices are attached to a central point, which is sometimes known as the "Hub" as given in the diagram below. Figure: An ideal
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