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






2. No additional Layer 3 header is created. The original Layer 3 header is used.






3. Uses protocol number 50.






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






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






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






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






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






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






10. A






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






12. 'Encryption - where Peer X uses Peer Y






13. IPSEC Encryption is performed by

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


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






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






16. RFC 2631 on the workings of the key generation/exchange process.






17. 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.






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






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






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






21. Uses the D-H algorithm to come to agreement over a public network.






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






23. '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.'






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






25. 'provides everything required to securely connect over a public media - such as the Internet.'






26. '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.'






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






28. Act of encapsulating a packet within another packet.






29. 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.






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






31. 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.






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






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






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






35. 'has a Next Protocol field which identifies the next Layer 4 transport protocol in use - TCP or UDP'






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






37. '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.'






38. Data integrity is the process of making sure data is not tampered with while it






39. Uses IKE for key exchange.






40. More CPU intensive






41. Has a trailer which identifies IPsec information and ESP integrity-check information.






42. 'in most cases - this mode is preferred with certificates.'






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






44. 'MACs with hash algorithms -'






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






46. Used in IPsec for two discreet purposes:






47. 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


48. Origin authentication validates the origin of a message upon receipt; this process is done during initial communications.






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






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