NETSEC 3 Exam Questions and
Answers 100% Pass
1) ________ is the use of mathematical operations to protect messages travelling
between parties or stored on a computer.
A) Cryptography
B) Encryption
C) Authentication
D) Confidentiality - ✔✔A
2) ________ is the security guarantee that people who intercept messages cannot read
them.
A) Integrity
B) Availability
C) Confidentiality
D) Encryption - ✔✔C
3) Which of the following is transmitted across a network?
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,A) The plaintext
B) The ciphertext
C) Both A and B
D) Neither A nor B - ✔✔B
4) A ________ is a mathematical process used in encryption and decryption.
A) key
B) cipher
C) plaintext
D) coding method - ✔✔B
5) A ________ is a random string of 40 to 4,000 bits (ones and zeros) used to encrypt
messages.
A) key
B) cipher
C) plaintext
D) code - ✔✔A
6) Someone who breaks encryption is called a ________.
A) cracker
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,B) coder
C) hacker
D) cryptanalyst - ✔✔D
7) ________ ciphers move letters around within a message but characters are not
substituted.
A) Transposition
B) Substitution
C) Both A and B
D) Neither A nor B - ✔✔A
8) ________ ciphers leave letters in their original positions.
A) Transposition
B) Substitution
C) Both A and B
D) Neither A nor B - ✔✔B
9) In codes, code symbols may represent ________.
A) complete words
B) complete phrases
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, C) individual letters
D) All of the above - ✔✔D
10) When two parties communicate with each other using symmetric key encryption,
how many keys are used in total to encrypt and decrypt?
A) 1
B) 2
C) 4
D) 8 - ✔✔A
11) Nearly all encryption for confidentiality uses ________ encryption ciphers.
A) public key
B) symmetric key
C) hashing
D) None of the above - ✔✔B
12) Nearly all encryption for confidentiality uses symmetric key encryption ciphers. -
✔✔TRUE
13) The best way to thwart exhaustive searches by cryptanalysts is ________.
A) to use codes
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Answers 100% Pass
1) ________ is the use of mathematical operations to protect messages travelling
between parties or stored on a computer.
A) Cryptography
B) Encryption
C) Authentication
D) Confidentiality - ✔✔A
2) ________ is the security guarantee that people who intercept messages cannot read
them.
A) Integrity
B) Availability
C) Confidentiality
D) Encryption - ✔✔C
3) Which of the following is transmitted across a network?
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,A) The plaintext
B) The ciphertext
C) Both A and B
D) Neither A nor B - ✔✔B
4) A ________ is a mathematical process used in encryption and decryption.
A) key
B) cipher
C) plaintext
D) coding method - ✔✔B
5) A ________ is a random string of 40 to 4,000 bits (ones and zeros) used to encrypt
messages.
A) key
B) cipher
C) plaintext
D) code - ✔✔A
6) Someone who breaks encryption is called a ________.
A) cracker
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,B) coder
C) hacker
D) cryptanalyst - ✔✔D
7) ________ ciphers move letters around within a message but characters are not
substituted.
A) Transposition
B) Substitution
C) Both A and B
D) Neither A nor B - ✔✔A
8) ________ ciphers leave letters in their original positions.
A) Transposition
B) Substitution
C) Both A and B
D) Neither A nor B - ✔✔B
9) In codes, code symbols may represent ________.
A) complete words
B) complete phrases
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, C) individual letters
D) All of the above - ✔✔D
10) When two parties communicate with each other using symmetric key encryption,
how many keys are used in total to encrypt and decrypt?
A) 1
B) 2
C) 4
D) 8 - ✔✔A
11) Nearly all encryption for confidentiality uses ________ encryption ciphers.
A) public key
B) symmetric key
C) hashing
D) None of the above - ✔✔B
12) Nearly all encryption for confidentiality uses symmetric key encryption ciphers. -
✔✔TRUE
13) The best way to thwart exhaustive searches by cryptanalysts is ________.
A) to use codes
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