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a) Calculate the CRC for the frame below:
Frame: 1101011011
Generator: 10011
Message after appending 4 zero bits: 11010110110000
b) OSI refers to a system in which any number of standards or protocols may be used to address one or more of the functions with any of the layers of the model.
i. State the three responsibilities of the data link layer.
ii. Layer 4, the transport layer provides an additional connection beneath the session layer. What are the 4 considerations that the transport layer ensures?
iii. Explain briefly the role of the physical layer.
c) In the context of IP addressing:
i. What does the message which has only 1's in the address imply?
ii. Which IP address is used by hosts when they are being booted and not used afterwards?
iii. Specify the range of host addresses in a Class D network.
iv. Give the Class E IP address format.
Selecting a Risk Control Strategy Risk controls involve selecting one of the 4 risk control strategies for every vulnerability. The flowchart is shown in the figure given below
Network can be distinguished by shape. According to which there are three most popular methodologies, which are shown as follows; Star Ring Bus
a) Explain the contents of the Cost Assessment. b) Various Documents are needed for Configuration Management. State three of them, and describe their importance. c) Given tha
What is problem formulation in network security
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(a) Describe DES encryption with a block diagram and brief steps. (b) How does triple DES improve security. What is the effective key length of triple DES? How can 3DES be compa
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In BUS topology every computer is directly connected to primary network cable in a single way. Bus networks are the easiest way to connect multiple users, but can have problems
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