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Tutorial 9

  • Writer: Michael Cheng
    Michael Cheng
  • Mar 30, 2021
  • 1 min read

1. What is denial of service (DoS)? How DOS causes vandalism in distributed environment?


2. What is Botnet and Permanent Denial of Service (PDoS)? How to relate botnet with PDoS?


3. Briefly describe terms below which is used in cryptographic concepts: Plaintext, Cipher-text, Encryption, Decryption and Key.


4. Firewall is always a type of reliable security mechanism. How many types of security control can be applied by firewall in improving the resource protection?


5. Find a case study of security issue in a distributed computing system and discuss its cause and effect.


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