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






2. 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


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






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






5. DoS attacks are more probable with this mode.






6. A






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






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






9. 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


10. Uses IKE for key exchange.






11. The DES algorithm that performs 3 times sequentially.






12. Benefits are that the preshared authentication can be based on ID versus IP address and the speed of the process.






13. 'The sending device decrypts the data with the second key - which is also 56 bits in length.'






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






15. 'Finally - the receiving devices decrypt the data with the first key.'






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






17. Uses protocol number 50.






18. 'algorithm encrypts and decrypts data three times with 3 different keys - effectively creating a 168-bit key.'






19. ' is defined in RFC 3174. has as output a 160-bit value -'






20. 'produces a 160-bit hash output - which makes it more difficult to decipher.'






21. You use this encryption method by keeping one key private and giving the other key to anyone in the public Internet. It does not matter who has your public key; it is useless without the private key.






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






23. 'MACs with hash algorithms -'






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






25. It uses UDP 500 and is defined by RFC 2409.






26. Does not provide payload encryption.






27. IPSEC performs this function by using a sequence field in the IPsec header combined with integrity checks.






28. Provides authentication and encryption of the payload.






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






30. Used in IPsec for two discreet purposes:






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






32. Is a two-phase protocol: The first phase establishes a secure authenticated channel and the second phase is where SAs are negotiated on behalf of the IPsec services.






33. 'is a more secure version of MD5 - and hash-based message authentication codes (HMAC) provides further security with the inclusion of a key-based hash.'






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






35. Integrity checks are done

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


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






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






38. 'can be achieved using one of three methods: preshared keys - encrypted nonces - or digital signatures.'






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






40. 'key exchange is vulnerable to a man-in-the-middle attack. You can rectify this problem by allowing the two parties to authenticate themselves to each other with a shared secret key - digital signatures - or public-key certificates.'






41. Where the original Layer 3 header and payload inside an IPsec packet is encapsulated. Tunnel mode does add overhead to each packet and uses some additional CPU resources.






42. Can be implemented efficiently on a wide range of processors and in hardware.






43. IPSEC Encryption is performed by

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


44. Drawback of this is that the hash is passed unencrypted and is susceptible to PSK crack attacks.






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






46. 'group 1 identifies a 768-bit key - group 1 is faster to execute - but it is less secure -'






47. 'Created by NIST in 1994 - is the algorithm used for digital signatures but not for encryption.'






48. 'Message digest algorithms have a drawback whereby a hacker (man in the middle) can intercept a message containing the packet and hash values - then re-create and transmit a modified packet with the same calculated hash to the target destination.'






49. Turns clear-text data into cipher text with an encryption algorithm. The receiving station decrypts the data from cipher text into clear text. The encryption key is a shared secret key that encrypts and decrypts messages.






50. 'Digital signatures. Peer X encrypts a hash value with his private key and then sends the data to Peer Y. Peer Y obtains Peer X







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests