ccna material pdf 2018

ccna material pdf 2018

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Viruses infected via email are called email viruses. (5) Virtual private network technology. Use virtual private network or virtual local area network. The virtual network technology is a special communication environment constructed by logical division and virtual construction based on the public network, making it private and concealed. 32 , the value is %Windows%\SYSTEM\Kernel.dll or %Windows%\SYSTEM\Kernel32.dll . The security of RSA relies on decomposition of large numbers. Both the public key and the private key are functions of two large prime numbers ( greater than 100 decimal digits ) . The following describes how the key pair is generated. (7) Proxy server: A computer ( software ) system that exchanges data with external servers on behalf of internal network users . It sends the approved internal user's request to the external server, and at the same time sends the response of the external network server back to the user. Click the link virus can be divided into source-type virus, intrusion viruses, operating system type virus, the virus shell type 4 species. The source code virus mainly attacks the source program written in high-level language. It inserts itself into the source program of the system,ccna material pdf 2018, compiles and links with the source program into an executable file, causing the executable file just generated to be directly infected. This virus is relatively rare and difficult to write; intrusive viruses are those viruses that replace some modules or stack areas in normal programs with themselves. They only attack certain specific programs and are highly targeted. Under normal circumstances, they are also difficult to detect. It is also difficult to clean up; operating system viruses use their own parts to add or replace part of the operating system's functions, which is more harmful; shell viruses mainly attach themselves to the beginning or end of normal programs, which is equivalent to adding to normal programs. With a shell, most file viruses fall into this category.

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Latest Cisco CCNA 200-301 Dumps

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