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Question:
a) Explain what you understand by the term brute force attack, giving an example of such an attack
b) Briefly outline the concept of Caesar cipher and identify any associated weaknesses.
c) Explain what you understand by encryption/decryption using a suitable illustration to support your answer and state on what two things the security of encrypted data is entirely dependent.
d) Differentiate between the symmetric and the asymmetric encryption system providing illustrations where necessary to support your answer.
e) The following technologies can be applied to an e-banking infrastructure to ensure security. Briefly explain the role of each one of them.
(i) SSL (Secure Socket Layer) (ii) Digital Certificate
QUESTION (a) What do you understand by a VLAN? Provide one advantage of using a VLAN. (b) What is a trunk port in a VLAN? (c) A VLAN will be created using one or more
Question : a) Below is a capture of an Ethernet II frame which contains an IPv4 packet and a TCP segment. Give the source MAC address for the frame in hexadecimal; the source I
ARP MESSAGE FORMAT Although the ARP data packet format is sufficiently general to allow hardware addresses and arbitrary protocol. ARP is almost usually used to bind a 32-bit
(a) Illustrate what you understand by Nyquist Capacity Theorem? (b) Consider we wish to transmit at a rate of 64 kbps over a 4 kHz noisy but error-free channel. What is the mini
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
Question 1 a) Explain how CSMA/CD works. b) Describe the term "exponential back-off". c) Describe the differences between "circuit switching" and "packet switching". d) Th
Discuss how developers should apply the following countermeasures to improve the security of their code:
Question: (a) For the bit stream 010011, sketch the waveforms for each of the code indicated. Assume the following: the signal level for the previous bit for NRZI was a 1
LOCALITY OF REFERENCE PRINCIPLE: Principle of "Locality of Reference" use to predict computer interaction patterns. There are two patterns shown as follows: a) Spatial loca
#questioAn elliptic curve y^2=x^3+ax+b(mod29) includes points P=(7, 15) and Q=(16, 13) a)Determine the equation of the crve b) Determine all values of x for which there is no point
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