ccna icnd1 pdf

ccna icnd1 pdf

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This example allows the external host 209.165.201.2 to have FTP access to any global address Criminal evidence, he will delete it or overwrite it with fake logs. In order to re-enter the system without being noticed in the future, hackers will change certain system settings and plant Trojan horses or other remote control programs in the system. . Where hostname is the address of the target computer. Ping has many advanced usage methods, here is an example. 5. Controllability 2. Port scanning principle Data unit integrity: The sending entity marks and identifies the data unit as the information signature function of the data itself ( commonly used Hash function, etc. ) . The receiving entity predetermined comparison authentication mark data to the reception result of discrimination is NO true. 192.168.50.3 (7) Upgrade 1.2 version: Upgrade the remote 1.2 version server program through Valentine's Day special edition "Glacier" . Firewall comparison of various properties are shown in Table . 5 - . 5 . 64 bits, the key used is 64 bits, the effective key length is 56 bits, and 8 bits are used for parity checking. The process of decryption is similar to that of encryption, but the order of the keys is exactly the opposite. DES encryption algorithm and RSA encryption algorithm K is the shared key. The MAC address binding, effectively prevent tampering and theft of IP addresses phenomenon. Next, the IP address of the host There are mainly three analysis methods based on state machines, modal logic and algebraic tools , but they still have limitations and loopholes and are in the stage of development and improvement. Based on Windows Trojans commonly used method to automatically load when you start the application, including the following. Technically, there are many ways to achieve logical isolation, but the main thing is to use firewalls. The development of firewalls is mainly reflected in performance,ccna icnd1 pdf, security and functions. In fact, these three are contradictory and restrict each other. Technology with multiple functions and good security often affects its performance; multiple functions also affect the security of the system. 9.1.4 E-commerce security system Tracing route to 202.96.102.4 over a maximum of 30 hops 1 84 ms 82 ms 95 ms 202.96.101.57 (2) System.ini : The name of the program after Shell=Explorer.exe . Data integrity Unauthorized access The use of certain functions to URL characters into ASC Ⅱ code, so as to hide the links page and * .js , * .asp and other foot this purpose. Return ASC Ⅱ code Escape (Character) , ASC Ⅱ code is XX format, XX is hexadecimal, for example, the space bar is %20 . Return the character unEscape(string) . Such as: Fundamental mechanism The transmission protocols used by the e-mail system include SMTP and POP3 . Among them, SMTP is responsible for the sending of mail. (2) How to prevent Code Red virus? Therefore, Visa and MasterCard are jointly launched by two credit card organizations, and have cooperated with many IT companies, such as Microsoft , Prompt Middle attack (Man-in-The-Middle Attack , abbreviated MITM attack ) is an "indirect" intrusion attacks, which pattern is affected by a variety of techniques to control a computer intruder placed in a virtual network connection Between the two communicating computers in, this computer is called the "middleman". Then the intruder this computer to simulate one or two original computer, the "middleman" to establish an active connection and allows it to be read or modified pass the original computer information delivery, but two of the original computer user thinks they are Communicate with each other. Typically, this "intercept data - revised change data - data transmission" process is called "session hijacking" (the Session Hijack) .

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Latest Cisco CCNA 200-301 Dumps

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