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. 'Encryption - where Peer X uses Peer Y
HMAC-MD5/HMAC-SHA
3DES
Asymetric Encryption Protocols
RSA
2. IPSEC tunnels data through IP using one of two protocols?
RSA
AH/ESP
'IPSEC (phase1 -step2)'
IPSEC (main mode)
3. '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
MD5
Difffie-Hellman
SHA
4. Used for integrity checks on peer and data sent by peer and for authentication checks.
'IPSEC (phase1 -step2)'
IKE
AH
IPSEC (aggressive mode)
5. 'has a Next Protocol field which identifies the next Layer 4 transport protocol in use - TCP or UDP'
RSA
AH/ESP
RSA/DSA
AH
6. This mode does not support identity protection or protection against clogging attacks and spoofing.
SHA
IPSEC (main mode)
IPSEC (aggressive mode)
3DES
7. 'defines the mode of communication - creation - and management of security associations.'
IPSEC (aggressive mode)
ISAKMP
Hashing
AES
8. A variable block- length and key-length cipher.
AES
Difffie-Hellman
Asymetric Encryption Protocols
AH
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.
ESP
Tunnel Mode (ipsec)
'DES - 3DES - or AES.'
IPSEC (main mode)
10. IPSEC Encryption is performed by
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
11. 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
12. Verify whether the data has been altered.
RSA/DSA
AES
Hashing
SHA
13. The protocol of choice for key management and establishing security associations between peers on the Internet.
RSA/DSA
IKE
'DES - 3DES - or AES.'
ISAKMP
14. Invented by Ron Rivest of RSA Security (RFC 1321).
IKE
MD5
SHA
IKE
15. 'It is not used for encryption or digital signatures; it is used to obtain a shared secret
hash algorithms
Difffie-Hellman
IPSEC (phase2)
DES
16. Main disadvantage of asymmetric algorithms is that they are slow.
MD5
RSA/DSA
RSA
'DES - 3DES - or AES.'
17. 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
18. That authenticate data packets and ensure that data is not tampered with or modified.
MD5
DSA
SHA
hash algorithms
19. Act of encapsulating a packet within another packet.
AH
RSA
Tunneling
3DES
20. More CPU intensive
hash algorithms
MD5
SHA
IPSEC (aggressive mode)
21. 'produces a 160-bit hash output - which makes it more difficult to decipher.'
hash algorithms
HMAC
SHA
RSA
22. Common key size is 1024 bits.
3DES
RSA
ISAKMP
AES
23. 'including Internet Security Association and Key Management Protocol (ISAKMP) - Secure Key Exchange Mechanism for the Internet (SKEME) - and Oakley.'
'MD5 - SHA-1 - or RSA'
IKE
AES
3DES
24. Can be implemented efficiently on a wide range of processors and in hardware.
AES
IPSEC (aggressive mode)
Difffie-Hellman
IKE
25. Negotiation of the ISAKMP policy by offering and acceptance of protection suites
'IPSEC (phase1 -step1)'
IPSEC (main mode)
AH
Transport Mode (Ipsec)
26. Uses the D-H algorithm to come to agreement over a public network.
IKE
Difffie-Hellman
IPSEC
MD5
27. '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
IPSEC (main mode)
Asymetric Encryption Protocols
IPSEC (phase2)
DSA
28. Provide authentication in Internet Key Exchange (IKE) Phase 2.
IKE
IPSEC (main mode)
HMAC
SHA
29. Used in government installs and was created to work with the SHA-1 hash algorithm.
DES
DSA
Difffie-Hellman
RSA
30. Origin authentication validates the origin of a message upon receipt; this process is done during initial communications.
SHA
'DES - 3DES - or AES.'
IPSEC BENEFIT
Transport Mode (Ipsec)
31. Key exchange for IPSEC
Tunnel Mode (ipsec)
RSA
IKE
IPSEC (aggressive mode)
32. A
IPSEC (main mode)
RSA
Transport Mode (Ipsec)
Hashing
33. 'can be achieved using one of three methods: preshared keys - encrypted nonces - or digital signatures.'
Hashing
Origin Auth (DH auth)
SHA
ISAKMP
34. The receiving device then encrypts the data with the second key.
3DES
Transport Mode (Ipsec)
AH
ESP
35. 'key lengths are 128 - 192 - or 256 bits to encrypt blocks of equal length.'
AES
Difffie-Hellman
DSA
3DES
36. 'The sending device decrypts the data with the second key - which is also 56 bits in length.'
IKE
3DES
Tunnel Mode (ipsec)
AH/ESP
37. 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.
SHA
'DES - 3DES - or AES.'
ISAKMP
Asymetric Encryption Protocols
38. Does not provide payload encryption.
AH
DSA
'MD5 - SHA-1 - or RSA'
ISAKMP
39. '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.'
3DES
DSA
RSA
IKE
40. Benefits are that the preshared authentication can be based on ID versus IP address and the speed of the process.
ESP
Tunnel Mode (ipsec)
IPSEC (aggressive mode)
Asymetric Encryption Protocols
41. 'MACs with hash algorithms -'
ISAKMP
RSA
hash-based message authentication codes (HMAC).
ESP
42. It also provides protection for ISAKMP peer identities with encryption.
IKE
IPSEC (main mode)
MD5
3DES
43. Data integrity is the process of making sure data is not tampered with while it
IPSEC BENEFIT
Hashing
Tunnel Mode (ipsec)
DES
44. '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.'
'DES - 3DES - or AES.'
Hashing
MD5
IPSEC (main mode)
45. Hybrid protocol that defines the mechanism to derive authenticated keying material and negotiation of security associations (SA).
IPSEC (main mode)
IKE
Difffie-Hellman
ISAKMP
46. '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
RSA
ESP
Difffie-Hellman
ISAKMP
47. DoS attacks are more probable with this mode.
ESP
DSA
Hashing
IPSEC (aggressive mode)
48. 'When using the hash-based key function -'
SHA
HMAC-MD5/HMAC-SHA
3DES
DES
49. One of the most popular tunneling protocols is
GRE
IPSEC (aggressive mode)
Antireplay
SHA
50. '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.'
Asymetric Encryption Protocols
HMAC
MD5
Difffie-Hellman