In this section of Data Communication and Networking – Network Security MCQ (Multiple Choice) Based Questions and Answers,it cover the below lists of topics.All the Multiple Choice Questions and Answers (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan.
This Section covers below lists of topics.
- Network Security MCQ.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. Message ________ means that the sender and the receiver expect privacy
- confidentiality
- integrity
- authentication
- none of the above
A. confidentiality
2. Message_____ means that the data must arrive at the receiver exactly as sent
- confidentiality
- integrity
- authentication
- none of the above
B. integrity
3. Message _______ means that the receiver is ensured that the message is coming from the intended sender, not an imposter
- confidentiality
- integrity
- authentication
- none of the above
C. authentication
4. ________ means that a sender must not be able to deny sending a message that he sent.
- Confidentiality
- Integrity
- Authentication
- Nonrepudiation
D. Nonrepudiation
5. _______ means to prove the identity of the entity that tries to access the system's resources.
- Message authentication
- Entity authentication
- Message confidentiality
- none of the above
B. Entity authentication
6. A(n) _________ can be used to preserve the integrity of a document or a message.
- message digest
- message summary
- encrypted message
- none of the above
A. message digest
7. A(n) ________function creates a message digest out of a message.
- encryption
- decryption
- hash
- none of the above
C. hash
8. A hash function must meet ________ criteria.
- two
- three
- four
- none of the above
B. three
9. A _______ message digest is used as an MDC.
- keyless
- keyed
- either (a) or (b)
- neither (a) nor (b)
A. keyless
10. A ________ signature is included in the document; a _______ signature is a separate entity.
- conventional; digital
- digital; digital
- either (a) or (b)
- neither (a) nor (b)
A. conventional; digital
11. To authenticate the data origin, one needs a(n) _______.
- MDC
- MAC
- either (a) or (b)
- neither (a) nor (b)
B. MAC
12. Digital signature provides ________
- authentication
- nonrepudiation
- both (a) and (b)
- neither (a) nor (b)
C. both (a) and (b)
13. Digital signature cannot provide ________ for the message
- integrity
- confidentiality
- nonrepudiation
- authentication
B. confidentiality
14. If _________ is needed, a cryptosystem must be applied over the scheme
- integrity
- confidentiality
- nonrepudiation
- authentication
B. confidentiality
15. A digital signature needs a(n)_________ system
- symmetric-key
- asymmetric-key
- either (a) or (b)
- neither (a) nor (b)
B. asymmetric-key
16. A witness used in entity authentication is ____________
- something known
- something possessed
- something inherent
- all of the above
D. all of the above
17. In _______, a claimant proves her identity to the verifier by using one of the three kinds of witnesses
- message authentication
- entity authentication
- message confidentiality
- message integrity
B. entity authentication
18. Password-based authentication can be divided into two broad categories: _______ and _______
- fixed; variable
- time-stamped; fixed
- fixed; one-time
- none of the above
C. fixed; one-time
19. In ________ authentication, the claimant proves that she knows a secret without actually sending it
- password-based
- challenge-response
- either (a) or (b)
- neither (a) nor (b)
B. challenge-response
20. Challenge-response authentication can be done using ________
- symmetric-key ciphers
- asymmetric-key ciphers
- keyed-hash functions
- all of the above
D. all of the above
21. A(n) _____ is a trusted third party that assigns a symmetric key to two parties.
- KDC
- CA
- KDD
- none of the above
A. KDC
22. A(n)______ creates a secret key only between a member and the center.
- CA
- KDC
- KDD
- none of the above
B. KDC
23. The secret key between members needs to be created as a ______ key when two members contact KDC.
- public
- session
- complimentary
- none of the above
B. session
24. __________ is a popular session key creator protocol that requires an authentication server and a ticket-granting server.
- KDC
- Kerberos
- CA
- none of the above
B. Kerberos
25. A(n) ________is a federal or state organization that binds a public key to an entity and issues a certificate.
- KDC
- Kerberos
- CA
- none of the above
C. CA
26. A(n) ______ is a hierarchical system that answers queries about key certification.
- KDC
- PKI
- CA
- none of the above
C. CA
27. The _______ criterion states that it must be extremely difficult or impossible to create the message if the message digest is given.
- one-wayness
- weak-collision-resistance
- strong-collision-resistance
- none of the above
A. one-wayness
28. The ________ criterion ensures that a message cannot easily be forged.
- one-wayness
- weak-collision-resistance
- strong-collision-resistance
- none of the above
B. weak-collision-resistance
29. The _______criterion ensures that we cannot find two messages that hash to the same digest
- one-wayness
- weak-collision-resistance
- strong-collision-resistance
- none of the above
C. strong-collision-resistance
