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Question:
(a) Describe fully with example the two access control methods available to implement database security.
(b) Discuss why database statistics (meta data) provide essential information for query optimization. Give four examples of typical statistics which are maintained by a database system.
(c) Discuss why query optimization is important in database systems in terms of its role in enhancing the system performance. Your answer should include descriptions of various stages involved in the optimization process.
The Internet is known as the set of networks connected by routers that are configured to pass traffic among any machine attached to any network in the set. By internet several
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 sourc
QUESTION a) Compare and contrast between static and dynamic routing. b) What are the merits (five merits) and limitations (3 limitations) of using Open Shortest Path First
What is information security Information security protects information (and facilities and systems which store, use and transmit it) from a broad range of threats, in order to p
This assignment aims to enhance students' understanding of the network protocol hierarchy and flow control and error control techniques by implementing a sliding window protocol in
Question: (a) Which type of attacker represents the most likely and most damaging risk to your network? (b) What is the basic reason that social engineering attacks succeed?
DATAGRAM REASSEMBLY Recreation of original datagram is known as reassembly. Ultimate receiver acts reassembly as given below.Fragments can reach out of order. Header bit check
Firewalls A firewall in an information security program that prevents specific types of information from moving between the outside world and the inside world. The firewall may
(a) Define what you understand by the following terms in Network Flows: i) UnDirected Path ii) Directed Path iii) Directed Cycle. iv) Tree In each of the above, expla
Asymmetric Encryption Asymmetric encryption method makes use of two different but related keys and either key can be used to encrypt or decrypt the message. This method is freque
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