capitulo 6 ccna 4

capitulo 6 ccna 4

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With the continuous emergence of attack methods using operating system security flaws, operating system and TCP/IP flaws have gradually become an important part of system security protection. On the basis of not affecting the normal system functions and network functions, security precautions are also an important content of section 2.2 . (6) Issue ministerial-level transmission key fob 1 and ministerial-level transmission key fob 2 to provide direct and decentralized protection keys for ministerial-level master control key fobs. Sending PSAM card transmission card, the function is to provide master key for the issuance of PSAM card. (4) very dangerous type: this type of virus removal programs, destroy data, clear the system memory area and operating systems weight information wanted. (6) Modify the registry that has been modified by the worm. The passwordless entry and hidden channel of the operating system ( formerly a convenient entry for system developers ) are also channels for hackers to invade. 9.3.2 SET -Provides secure e-commerce data exchange (5) Use firewall software to ban the virus from ports 135 , 4444 , 69, etc., or use the " TCP/IP filtering " function to ban these ports. Let the PIX firewall translate all IP addresses specified by the nat command to the specified interface. This is called the interface PAT . Port address translation (PAT) will be discussed in detail later This example allows any external host to perform FIP access to the global address 209.165.201.1 The combination of virus technology and hacker technology poses a greater threat to information security. In recent years,capitulo 6 ccna 4, popular computer viruses have been combined with the network without exception, and have multiple transmission methods and attack methods. Once they break out, they will quickly spread on the network. , Memory reduction, etc. ) , once found, it should be checked with anti-virus software immediately. This function independently records the log of the audit security system and tests the information security response of the control system. 3) Prevent illegal IP and MAC addresses of the internal network Most viruses generally do not attack the system immediately after infecting the system. They can be hidden in the system for a long time, and only when their specific conditions are met will their performance ( destruction ) module be activated to display the attack information or perform system damage. This state may remain for days, months or even years. The triggering conditions that cause computer viruses to attack are mainly as follows.

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