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(a) Explain briefly the following terms as used in network security:
(i) Denial of service (DoS) attack
(ii) Birthday attack
(iii) DeMilitarized Zone (DMZ)
(iv) Social Engineering
(v) Pretty Good Privacy (PGP) algorithm
(b) (i) List three benefits of using IPSec.
(c) Briefly explain the Cipher Block Chaining (CBC) mode of operation stating its advantages, disadvantages and uses.
(d) Describe five guidelines for a desirable password selection and use policy in a corporate organisation.
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