Test your basic knowledge |

CCIE Sec Encryption Ipsec

Subjects : cisco, it-skills, ccie
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Drawback of this is that the hash is passed unencrypted and is susceptible to PSK crack attacks.






2. A






3. The DES algorithm that performs 3 times sequentially.






4. ID exchange and authentication of D-H key by using the reply to the received nonce or string of bits

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


5. Provides authentication and encryption of the payload.






6. 'When using the hash-based key function -'






7. That authenticate data packets and ensure that data is not tampered with or modified.






8. It also provides protection for ISAKMP peer identities with encryption.






9. 'The messages are authenticated - and the mechanisms that provide such integrity checks based on a secret key are usually called'






10. 'It is not used for encryption or digital signatures; it is used to obtain a shared secret






11. 'Developed in 1977 by Ronald Rivest - Adi Shamir - and Leonard Adleman (therefore - RSA).'






12. 'often called public-key algorithms - do not rely on a randomly generated shared encryption key; instead - they create two static keys. These static keys are completely different - but mathematically bound to each other; what one key encrypts - the o






13. 'A 56-bit encryption algorithm - meaning the number of possible keys






14. Does not provide payload encryption.






15. 'defines the mode of communication - creation - and management of security associations.'






16. 'group 2 identifies a 1024-bit key - group 2 is more secure - but slower to execute.'






17. IPSec SAs are negotiated and protected by the existing IPsec SA.






18. Integrity checks are done

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


19. You check it by hashing data and appending the hash value to the data as you send it across the network to a peer.






20. Uses protocol number 50.






21. Verify whether the data has been altered.






22. A variable block- length and key-length cipher.






23. The receiving device decrypts the data with the third key.






24. More CPU intensive






25. Main mode establishes ISAKMP security association in six messages and performs authenticated D-H exchange.






26. Hybrid protocol that defines the mechanism to derive authenticated keying material and negotiation of security associations (SA).






27. 'group 5 identifies a 1536-bit key - provides for highest security but is the slowest of all groups.'






28. The receiving device then encrypts the data with the second key.






29. The sending device encrypts for a final time with another 56-bit key.






30. 'Encryption - where Peer X uses Peer Y






31. Takes variable-length clear-text data to produce fixed-length hashed data that is unreadable.






32. Provide authentication in Internet Key Exchange (IKE) Phase 2.






33. The protocol of choice for key management and establishing security associations between peers on the Internet.






34. 'requires that the sender and receiver have key pairs. By combining the sender






35. 'establishes ISAKMP SA in three messages -because it negotiates a ISAKMP policy and a DJ nonce exchange together.'






36. 'DSA is roughly the same speed as RSA when creating signatures - but 10 to 40 times slower when verifying signatures. Because verification happens more frequently than creation - this issue is worth noting when deploying DSA in any environment.'






37. This mode does not support identity protection or protection against clogging attacks and spoofing.






38. Main disadvantage of asymmetric algorithms is that they are slow.






39. IPSEC tunnels data through IP using one of two protocols?






40. Negotiation of the ISAKMP policy by offering and acceptance of protection suites

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


41. Message of arbitrary length is taken as input and produces as output a 128-bit fingerprint or message digest of the input.






42. Invented by Ron Rivest of RSA Security (RFC 1321).






43. One of the most popular tunneling protocols is






44. IPsec implements using a shim header between L2 and L3






45. Common key size is 1024 bits.






46. Negotiation of a shared secret key for encryption of the IKE session using the D-H algorithm

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


47. Used for integrity checks on peer and data sent by peer and for authentication checks.






48. 'key lengths are 128 - 192 - or 256 bits to encrypt blocks of equal length.'






49. DoS attacks are more probable with this mode.






50. Negotiation of the ISAKMP policy by offering and acceptance of protection suites