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CCIE Sec Encryption Ipsec
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CCIE Sec Encryption Ipsec
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25 Questions

1. 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.

2. The DES algorithm that performs 3 times sequentially.

3. A

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

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

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

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

8. Provides authentication and encryption of the payload.

9. Act of encapsulating a packet within another packet.

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

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

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

13. More CPU intensive

14. Used in IPsec for two discreet purposes:

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

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

17. Uses IKE for key exchange.

18. Used in government installs and was created to work with the SHA-1 hash algorithm.

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

20. Common key size is 1024 bits.

21. Key exchange for IPSEC

22. One of the most popular tunneling protocols is

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

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

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

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