cisco 200-301 notes

cisco 200-301 notes

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The certificate issued by Universal CA does not depend on fixed internal users. Only one E-mail address is needed to apply and apply the certificate, so it has a wide range of applications. (1) Download the cover letter file recovery tool RSRepair.exe . (2) virus creates a named runtime system BILLY mutex, the purpose is to ensure that there is a memory in parts of virions, it was found to prevent the user. (4) Initial configuration of Cisco PIX 515 firewall. (3) Use of anti-spam software. (1) Master the installation method of Rising anti-virus software. When encrypting information m , first divide m into equal-length data blocks m 1 , m 2 , ..., m i , block length s , where 2 s ≤ n , s REALM ( domain ) . For example, a standard Kerberos user is: name/instance@REALM . (3) .dll files. (3) DSA : can be used for digital signatures. 9.1.3 Security requirements of e-commerce The server is used as a puppet machine. lowest 4. IE 's right-click menu is modified [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\ System] , "DisableRegistryTools" = dword : 00000000 Refers to the feature that information is not leaked to unauthorized individuals, entities, or processes in accordance with given requirements, or is provided with the characteristics of its use, that is, to prevent useful information from leaking to unauthorized individuals or entities, and emphasize the feature that useful information is only used by authorized objects. 8) Do a good job of data backup USERnalTle (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, 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,cisco 200-301 notes, 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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