ccna book by todd lammle pdf

ccna book by todd lammle pdf

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4. What are the transmission methods of computer viruses? 1. Measures to prevent hacker intrusion 1.4.5 Information leakage or loss (2) When the server processes certain information ( such as forms ) input by remote users, it is vulnerable to attacks by remote users. (1) Leak host system information to help hackers invade. The first step: the installation of the Trojan server program. In practical applications, people usually combine conventional passwords and public key passwords together, such as using DES or The encryption key ( public key ) and decryption key ( private key ) used by the public key encryption system are different. Since the encryption key is public, the distribution and management of the key is very simple. For example, for a network with n users, only 2 n keys are needed . The public key encryption system can also easily implement digital signatures. Therefore, it is most suitable for the needs of e-commerce applications. In practical applications, the public-key encryption system has not completely replaced the symmetric-key encryption system. This is because the public-key encryption system is based on cutting-edge mathematical problems, the calculations are very complex, and its security is higher,ccna book by todd lammle pdf, but its realization The speed is far behind the symmetric key encryption system. In practical applications, the respective advantages of both can be used, a symmetric encryption system encrypted file, encrypted using the public key encryption system "encrypted file" key ( session key ) , which is a hybrid encryption system, which solves This solves the problem of computing speed and key distribution management. Therefore, public key cryptosystems are usually used to encrypt critical and core confidential data, while symmetric cryptosystems are usually used to encrypt large amounts of data.

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Latest Cisco CCNA 200-301 Dumps

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