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cisco ccna 2020

    cisco ccna 2020

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  • Some Trojan horses can not only add, delete and modify files, but also search for passwords in the cache, set passwords, scan the IP address of the target machine , perform keylogging, and remote registry operations that are not available in general remote control software. And lock the mouse and other functions. ATTRIB -h -s -r Explorer.exe Del Explorer.exe Del D:\inetpub\scripts\Root.exe Different viruses have different destructive behaviors, and the representative behaviors are as follows: protocol (4) Discard unmatched information packets. By default, all packets that cannot match any rules are discarded, but these packets are not recorded. Add it to the end of the rule set to change this situation, which is a standard rule that every rule set should have . Generally,cisco ccna 2020, foreign applications or controls run by browsers are based on the "sandbox" security model. "Sandbox" provides The transmission protocols used by the e-mail system include SMTP and POP3 . Among them, SMTP is responsible for the sending of mail. 1. Principle of buffer overflow attack (7) Disturb the screen display: the character display is disordered, dropped, surrounded, inverted, the cursor drops, scrolls, jitters, eats characters, etc. 9) Bundled in the startup file (4) Exploiting system loopholes will become a powerful way of spreading viruses. The development of the Internet has exposed weaknesses that are vulnerable to attack. In response to hacker attacks, it is necessary to use intrusion detection and active defense (IDS) , real-time interactive monitoring and active defense. (2) The client has a public IP , but a firewall is installed. (2) Record various password information: including power-on password, screen saver password, various shared resource passwords and most of the password information that appeared in dialog boxes, and users are allowed to expand this function by themselves in versions above 1.2 , 2.0 above version of this at the same time also provides keystroke recording function. The DH key exchange protocol is as follows. CGI programs are the main source of Web security vulnerabilities, and their security vulnerabilities are manifested in the following aspects: 2. Implement an attack (4) Remove sharing. After being invaded by Nimda virus, some new shares will pop up in the system, such as the sharing of C drive, D drive, etc., and their sharing attributes should be removed. The PIX firewall uses a global address and assigns a virtual IP address to the internal NAT address. After adding, changing or deleting a global command statement, the clear xlate command should be used to clear all translation slots and make the global IP address available in the translation table. (3) Port : Set port, usually FTP services use the 21 ports, but here is the use of HTTP 's 80 2) Implement access control 9.2 Security measures for e-commerce (1) nat command (3) If Flcss.exe exists , delete it and run the command as shown below. C:\Windows\System>Del Flcss.exe First, connect the network settings as shown in Figure 5.9 . It has IP address range ~ , there are E-mail , the WWW , the FTP and other server, the PIX Firewall internal virtual IP ranges: ~ , the following policy can be defined. (2) Enter the configuration mode of the Cisco PIX 515 firewall. Electronic signatures based on PKI are called digital signatures. Some people call "electronic signatures" as "digital signatures", but this is actually a general term. Digital signature is only a specific form of electronic signature. Although electronic signatures have gained technological neutrality, they also bring inconvenience to use. The law has further stipulated electronic signatures, such as the aforementioned UNCTAD ’s “Model Law on Electronic Signatures” and the EU’s “Common Framework for Electronic Signatures”. The "Directives" stipulate "reliable electronic signatures" and "advanced electronic signatures", which actually stipulate the functions of digital signatures. This kind of regulation enables digital signatures to obtain better application security and operability. At present, the only electronic signature with practical significance is public key cryptography. Therefore, the project is still before the widespread use of domestic and foreign-based PKI digital signature technology. As a public key infrastructure, PKI can provide a variety of online security services, such as authentication, data confidentiality, data integrity and non-repudiation. These all use digital signature technology, which is also the focus of this chapter.

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Latest Cisco CCNA 200-301 Dumps

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Latest Cisco CCNA 200-301 Exam Information

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Exam Code: 200-301

Certification Provider: Cisco

Certification Exam Name:Cisco CCNA

Update Date: Sep 28,2021

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