SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
CCIE Sec Encryption Ipsec
Start Test
Study First
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. A variable block- length and key-length cipher.
ISAKMP
AES
RSA
Difffie-Hellman
2. The receiving device decrypts the data with the third key.
Tunneling
hash algorithms
3DES
AH
3. IPsec implements using a shim header between L2 and L3
RSA
ESP
MD5
AH/ESP
4. 'group 2 identifies a 1024-bit key - group 2 is more secure - but slower to execute.'
Difffie-Hellman
IPSEC (phase2)
SHA
IPSEC (aggressive mode)
5. 'It is not used for encryption or digital signatures; it is used to obtain a shared secret
Difffie-Hellman
ESP
'DES - 3DES - or AES.'
IPSEC (aggressive mode)
6. Used in IPsec for two discreet purposes:
Difffie-Hellman
hash algorithms
RSA
DES
7. Uses protocol number 51.
AES
IPSEC (aggressive mode)
3DES
AH
8. Drawback of this is that the hash is passed unencrypted and is susceptible to PSK crack attacks.
Asymetric Encryption Protocols
IPSEC (aggressive mode)
IPSEC (main mode)
hash algorithms
9. 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.
Tunnel Mode (ipsec)
RSA
DES
AH/ESP
10. It also provides protection for ISAKMP peer identities with encryption.
ISAKMP
Difffie-Hellman
IPSEC (main mode)
3DES
11. RFC 2631 on the workings of the key generation/exchange process.
3DES
SHA
Difffie-Hellman
DES
12. Verify whether the data has been altered.
IPSEC (aggressive mode)
Hashing
3DES
AH/ESP
13. Main mode establishes ISAKMP security association in six messages and performs authenticated D-H exchange.
Hashing
IPSEC (main mode)
3DES
SHA
14. 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
15. '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
ESP
RSA
Difffie-Hellman
3DES
16. Has a trailer which identifies IPsec information and ESP integrity-check information.
ESP
RSA
DSA
3DES
17. DoS attacks are more probable with this mode.
Hashing
IPSEC (aggressive mode)
DES
AES
18. 'The sending device decrypts the data with the second key - which is also 56 bits in length.'
Difffie-Hellman
Origin Auth (DH auth)
IKE
3DES
19. A
AES
Hashing
AH
'DES - 3DES - or AES.'
20. IPSEC tunnels data through IP using one of two protocols?
IPSEC (main mode)
Hashing
AH/ESP
IKE
21. Uses protocol number 50.
IPSEC (aggressive mode)
ISAKMP
IKE
ESP
22. 'requires that the sender and receiver have key pairs. By combining the sender
IPSEC
Difffie-Hellman
AH
IPSEC (aggressive mode)
23. Uses IKE for key exchange.
Tunneling
ISAKMP
AH
SHA
24. 'Developed in 1977 by Ronald Rivest - Adi Shamir - and Leonard Adleman (therefore - RSA).'
HMAC
RSA
ISAKMP
Antireplay
25. '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
Hashing
Asymetric Encryption Protocols
IPSEC (main mode)
3DES
26. That authenticate data packets and ensure that data is not tampered with or modified.
IKE
RSA
hash algorithms
MD5
27. Provide authentication in Internet Key Exchange (IKE) Phase 2.
AH
SHA
HMAC
Difffie-Hellman
28. 'The messages are authenticated - and the mechanisms that provide such integrity checks based on a secret key are usually called'
RSA
IPSEC
message authentication codes (MAC).
3DES
29. 'defines the mode of communication - creation - and management of security associations.'
3DES
3DES
ISAKMP
'MD5 - SHA-1 - or RSA'
30. Message of arbitrary length is taken as input and produces as output a 128-bit fingerprint or message digest of the input.
DES
MD5
IKE
IPSEC (aggressive mode)
31. 'Three keys encrypt the data - which results in a 168-bit encryption key. The sending device encrypts the data with the first 56-bit key.'
3DES
Antireplay
MD5
AES
32. '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.'
DSA
DES
IPSEC (main mode)
IKE
33. The receiving device then encrypts the data with the second key.
Difffie-Hellman
RSA
MD5
3DES
34. One of the most popular tunneling protocols is
RSA
'MD5 - SHA-1 - or RSA'
GRE
AH
35. ' is defined in RFC 3174. has as output a 160-bit value -'
DSA
SHA
'IPSEC (phase1 -step2)'
IKE
36. Common key size is 1024 bits.
Difffie-Hellman
HMAC-MD5/HMAC-SHA
IKE
RSA
37. 'When using the hash-based key function -'
Difffie-Hellman
HMAC-MD5/HMAC-SHA
3DES
ESP
38. 'provides everything required to securely connect over a public media - such as the Internet.'
RSA
IPSEC
HMAC-MD5/HMAC-SHA
Difffie-Hellman
39. Benefits are that the preshared authentication can be based on ID versus IP address and the speed of the process.
AES
IPSEC (phase2)
AH/ESP
IPSEC (aggressive mode)
40. 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.
message authentication codes (MAC).
DES
ESP
AH/ESP
41. 'Created by NIST in 1994 - is the algorithm used for digital signatures but not for encryption.'
RSA
IPSEC BENEFIT
SHA
DSA
42. 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.
IPSEC BENEFIT
RSA
IKE
Difffie-Hellman
43. Used in government installs and was created to work with the SHA-1 hash algorithm.
AH
IPSEC
MD5
DSA
44. 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.
AES
Difffie-Hellman
AH
Asymetric Encryption Protocols
45. 'can be achieved using one of three methods: preshared keys - encrypted nonces - or digital signatures.'
DSA
AH
AH
Origin Auth (DH auth)
46. Integrity checks are done
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
47. Provides authentication and encryption of the payload.
AH
ESP
Asymetric Encryption Protocols
3DES
48. 'Encryption - where Peer X uses Peer Y
3DES
RSA
hash algorithms
Origin Auth (DH auth)
49. 'produces a 160-bit hash output - which makes it more difficult to decipher.'
AES
SHA
ISAKMP
IPSEC (aggressive mode)
50. Used for integrity checks on peer and data sent by peer and for authentication checks.
ISAKMP
AH
'MD5 - SHA-1 - or RSA'
Hashing