ccna 2 chapter 9 pdf

ccna 2 chapter 9 pdf

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The above is the technical realization principle and the whole process of the operability, security and digital signature that are commonly used in current electronic signatures. POP3 's response is also very simple, only two response methods are defined, the text string +OK means success, -ERR means failure. --> Encryption technology of computer network 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. (2) Master the manual removal method of shock wave virus. By making the address space of the data segment of the attacked program non-executable, it is impossible for hackers to execute the code of the attacked program's input buffer. This technique is called non-execution buffer technology. 6) Mandatory access control Other protocols such as POP , FTP , Telnet , RPC , UDP , ICMP and other protocols are also similar in process, so I won’t repeat them here due to space limitations. Many firewall packet checking method in the order, when the firewall receives a packet, it first with the first 1 regulations 4. Computers based on quantum mechanics (3) E-mail viruses are not actually a separate type of virus. Strictly speaking, they should be classified into file-type viruses and macro viruses, but because this virus uses a unique e-mail transmission method ( not including Few types are also optimized specifically for e-mail propagation methods ) , so they are used to define them as e-mail viruses. 7. Intrusion detection and active defense (2) System.ini : The name of the program after Shell=Explorer.exe . Both parties to e-commerce transactions face security threats. The security threats faced by enterprises mainly include: hackers destroy the security system of e-commerce systems and modify user data ( such as user orders ) by impersonating legitimate users ; malicious competitors obtain business secrets ( such as customers ) through various illegal methods. Data ) , or order products in the name of others to spy on the company’s product information ( such as inventory status ) ; after submitting a product order, consumers refuse to pay or deny that they have ordered the product; hackers establish the same as the corporate site The fake site to obtain consumer confidential data ( such as credit card numbers ) . Security threats faced by consumers include: impersonator on behalf of consumers to purchase goods, while the consumer is asked to pay or return the goods; the consumer's confidential data ( such as credit card number ) is transmitted to the fake seller,ccna 2 chapter 9 pdf, or The data is eavesdropped in the process of transmission; the internal staff of the seller intercepts the order or payment, so that the consumer does not get the goods after the payment; the hacker sends a large number of false orders to the merchant’s server to occupy resources, so that legitimate users cannot get the normal Service.

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Latest Cisco CCNA 200-301 Dumps

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