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ccna certification practice exam quizlet

    ccna certification practice exam quizlet

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  • (2) Identity authentication. Identity authentication emphasizes consistency verification, which must match the consistency proof. Generally, identity authentication includes verification basis, verification system and security requirements. (3) End-to-end encryption is an encryption method for data from one end to the other. The data is encrypted at the sending end and decrypted at the receiving end. The intermediate node does not appear in plaintext. End-to-end encryption is done at the application layer. In end-to-end encryption,ccna certification practice exam quizlet, all messages except the header in the data transmission unit run through the entire transmission process in the form of ciphertext. Only at the sending end and the receiving end are there encryption and decryption equipment, and any node in the middle of the message No decryption. Therefore, there is no need for cryptographic equipment, and compared with link encryption, the number of cryptographic equipment can be reduced. On the other hand, the data transmission unit is composed of a header and a message . The message is a collection of data to be transmitted, and the header is routing information, etc. ( because routing is involved in end-to-end transmission ) . In link encryption, both the message and the header must be encrypted. In end-to-end encryption, although each intermediate node on the path does not decrypt the message, in order to transmit the message to the destination, routing information must be checked. Therefore, only the message can be encrypted, but the header cannot be encrypted. In this way, it is easy to be discovered by some communication analysis, and some sensitive information can be obtained from it. Link encryption is easier for users and uses fewer keys, while end-to-end encryption is more flexible and visible to users. End-to-end encryption can also be used when the security status of each node in the link encryption is not assured.

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Latest Cisco CCNA 200-301 Dumps

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Latest Cisco CCNA 200-301 Exam Information

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Exam Code: 200-301

Certification Provider: Cisco

Certification Exam Name:Cisco CCNA

Update Date: Jun 15,2021

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