| 1. | The type of encoding in which manipulation of bit streams without regard to what the bits mean is ..................... |
| a. | Destination encoding |
| b. | Entropy encoding |
| c. | Source encoding |
| d. | Differential encoding |
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Answer: (b).Entropy encoding
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| 2. | Which one of the following is correct ? |
| a. | Character - represented by One’s Complement |
| b. | Character - represented by Two’s Complement |
| c. | Integer - represented by ASCII |
| d. | Character - represented by Unicode |
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Answer: (d).Character - represented by Unicode
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| 3. | The protocol used to provide security to e-mails? |
| a. | POP |
| b. | PGP |
| c. | SNMP |
| d. | HTTP |
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Answer: (b).PGP
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| 4. | The art of breaking ciphers is known as: |
| a. | cryptology |
| b. | cryptography |
| c. | cryptanalysis |
| d. | crypting |
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Answer: (c).cryptanalysis
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| 5. | The number of subkeys generated in IDEA algorithm are ................. |
| a. | 54 |
| b. | 48 |
| c. | 52 |
| d. | 50 |
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Answer: (c).52
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| 6. | Number of S - boxes used in DES algorithm is ............... |
| a. | 4 |
| b. | 8 |
| c. | 16 |
| d. | 32 |
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Answer: (b).8
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| 7. | The ................... portion of LAN management software restricts access, records user activities and audit data etc. |
| a. | Configuration management |
| b. | Security management |
| c. | Performance management |
| d. | None of these |
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Answer: (b).Security management
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| 8. | In cryptography the following uses transposition ciphers and the keyword is LAYER. Encrypt the following message (spaces are omitted during encryption) WELCOME TO NETWORK SECURITY! |
| a. | WMEKREETSILTWETCOOCYONRU! |
| b. | EETSICOOCYWMEKRONRU!LTWET |
| c. | LTWETONRU!WMEKRCOOCYEETSI |
| d. | ONRU!COOCYLTWETEETSIWMEKR |
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Answer: (b).EETSICOOCYWMEKRONRU!LTWET
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| 9. | The length of the key in one time pad method is .................... |
| a. | Random |
| b. | Fixed |
| c. | 64 |
| d. | 56 |
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Answer: (a).Random
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| 10. | ............... is an example for public key algorithm. |
| a. | RSA |
| b. | DES |
| c. | IREA |
| d. | RC5 |
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Answer: (a).RSA
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