ccna book 2020

ccna book 2020

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(1) Understand the principles of firewall static and dynamic address translation. 4.2.2 Data integrity authentication (2) Fast and convenient (3) Identity authentication: The two parties who transmit emails on the Internet cannot meet each other, so there must be a way to determine the identity of the other party. The sender's digital certificate can be used to digitally sign the e-mail before transmission to determine the sender's identity, rather than being impersonated by others. (11) Interference with the printer: intermittent printing, changing characters, etc. Data integrity mainly addresses the integrity of data units and the integrity of data unit sequences. The difference with ordinary letters is that ordinary letters must choose the closest route,ccna book 2020, while emails always choose the most empty The route command defines a static route for the interface. Route command statement may have a specific destination, or can generate a static default route. Table . 5 - 13 is described with route options and parameters of the command, the specific command syntax is shown below. The main factors of network insecurity and the main threats caused by them This option (3) Double-click the corresponding string and change the key value of Customize Search and Search Assistant to the URL of a certain search engine . For example, HTTP : //ie.search.msn.com and other search engines. User security settings of the operating system (1) Spam and mail bombs. 5) Teardrop attack The netmask used for global_ip and local_ip . For the host address, always use As long as users browse such web pages, the hard disk will be shared, which is more harmful than Trojan horse programs. Hackers can use this method to treat the user's hard disk as his logical hard disk, copy files, delete files, rename files, and even format the hard disk in the computer. The passwordless entry and hidden channel of the operating system ( formerly a convenient entry for system developers ) are also channels for hackers to invade. Mode, it means to use PORT mode. The security of the RSA public-key cryptosystem depends on the difficulty of calculating the private key ( n , d ) from the public key ( n , e ) , and the latter is equivalent to finding its two prime factors p from n And q . Therefore, the search for effective operator factorization method is to seek to break RSA Key public-key cryptography. (4) Exploiting system loopholes will become a powerful way of spreading viruses. 3) Threats posed by ASP Identification techniques and methods If the password validity period data is saved in the etc/passwd file, this entry looks like this. Identity authentication is usually implemented using public key encryption technology, digital signature technology, and digital certificate technology. The core of e-commerce is to transmit business information and conduct online transactions through information network technology. The e-commerce system is a computer system, and its security is a system concept, not only related to the computer system structure, but also to the environment of e-commerce applications. The quality of personnel is related to social factors. All in all, the content of computer security mainly refers to two aspects: physical security and logical security. Specifically, it includes the following aspects.

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