question on ccna

question on ccna

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Universal CA can generate certificates in the above three methods, making it extremely convenient for users to apply. (3) Press Ctrl + Alt + Del key to bring up the "Task Manager" window, click the "Processes" tab,question on ccna, check into whether the process has two Explorer.exe . If two Explorer.exes are found , it means that the Trojan has been running on the machine and the Trojan should be killed immediately; otherwise, it means that the Trojan has not been executed, and you can go to step (5) . Words such as PORT or "active mode". Because FTP has only two login methods: PORT and PASV , cancel PASV However, after 20 years of use, it has been found that DES many shortcomings of DES crack method of day also increasingly effective. AES ( Advanced Encryption Standard ) will replace DES as a new generation encryption standard. The weakness of the DES algorithm is that it cannot provide sufficient security because its key capacity is only 56 bits. For this reason, later proposed triple DES or 3DES system, three different key data block three ( or two ) plus dense, three times faster than the ordinary method of encryption. Its strength is about the same as the strength of a 112 -bit key. 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. . ④ For the FlashFXP client: execute "Options" → "Preferences" → "Proxy / Firewall / Identification " command to select passive mode; or execute "Site Management" → "Corresponding Site" → "Options" command, select to use passive mode Active mode; or execute the "Quick Connect" → "Switch" command to select the passive mode. Reports about hacker threats have been common, and the negligence of internal staff and even deliberately acting as spies pose a greater threat to network security. Internal staff have more access to internal information, and any carelessness at work may threaten information security. Whether it is an intentional attack or an unintentional misoperation, it will bring immeasurable losses to the system. Although most attackers currently use tampering with website homepages and denial of service attacks in a prank manner, when the attackers’ technology reaches a certain level, they can eavesdrop on information on the network, steal user passwords, databases and other information. You can also tamper with the contents of the database, forge user identities, and deny your signature. What's more, you can delete database content, destroy network nodes, and release computer viruses.

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