ccna 8.3.1.2

ccna 8.3.1.2

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3.3.1 RSA public key cryptosystem Identification techniques and methods What is the most significant feature of the cover letter virus? 2. Adaptive chosen-plaintext attack (Adaptive-Chosen-Plaintext Attack) If you want to see the real password, you need to use the command: ypcat passwd . Electromagnetic / RF interception (2) Enter the configuration mode of the Cisco PIX 515 firewall. 135.79.99.0/24 192.168.3.4 is bound to its MAC address 00e0.1e40.2a7c and can be configured as follows. (4) Password verification. Use the password verification program in the password checker to check the weak sub-passwords in the password set. Prevent attackers from logging into the system with fake identity. 3) Step 3 : Turn off useless services ip address inside 10.0.0.3 255.0.0.0 The first 4 chapters digital signature and CA authentication technology The current NIS ( Network Information System) was also called YP (Yellow Pages) before . The purpose of NIS is to allow multiple computers on a network to share configuration information, including password data. The purpose of NIS is to improve the security of the system . If the NIS system is used , the password file is quite small, and it may look like the following. Next , configure the internal host 192.168.3.4 to prohibit it from using WWW to access the external network. its 9) Rebound port type Trojan horse (2) global command The two parties communicating on the Internet can send signed data messages after mutually verifying their identities. The whole process of digital signature is divided into two parts, namely signature and verification. The process of digital signature and verification and the principle of technical realization are shown in Figure 4.2 . (2) Master the manual removal method of shock wave virus. (2) The serial number of the certificate. Each certificate has a unique certificate serial number. Operational safety refers to the continuous and normal operation of the protection system. (3) Press Ctrl + Alt + Del key to bring up the "Task Manager" window, click the "Processes" tab, 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) . (3) Encryption (Encrypt) file, such as setting up Encrypt , automatically encrypted with the public key of the recipient when sending mail, and indicate the ciphertext. Use Notepad to create a new text file registry.txt , then change the suffix txt to reg to form a registry file, and write the following content. To ensure information security, the most fundamental thing is to ensure that the basic features of information security play a role. Therefore, the following first introduces the five major characteristics of information security . Require to identify the user’s name (3) Access control. Access control characterizes the ability of the subject to operate with the specified authority over the object. The content of access control includes: personnel restrictions, access authority settings,ccna 8.3.1.2, data identification, control types and risk analysis, etc. It is an important aspect of internal network information security. (3) The reason for the rule change. For this kind of attack, some isolation devices can be used to prevent broadcasting. If the network is divided into multiple VLANs , the broadcast in each VLAN will not be propagated to other broadcast domains to solve such an attack. Main solve this problem to the idea is to prevent computer IP broadcast request to respond. global(outside)1 192.168.50.75 no rip inside default The background of Socket programming, a method of developing client / server applications. Developing a scanner is an ambitious project that usually makes programmers very satisfied. Identification techniques and methods Network and other technologies. In a large enterprise, in order to have a secret conversation between any two people, everyone needs to remember many keys. Kerberos provides a better solution. It makes the management and distribution of keys very easy. Although this method itself has certain shortcomings, it establishes a secure and trustworthy key distribution center. each user only know one Ge and KDC key session on it. It can be seen from the above analysis that, theoretically, any password can be cracked, and it is only a matter of time. For some systems with lower security, the speed is usually very fast. For those situations where a password or registration code is required to install the software, password cracking is easier. You may often encounter this situation. For example, when installing a Microsoft software, you usually need to enter a CD-Key during the installation process . If the CD-Key is correct, then it will start the installation; if it is illegal, then the installation will exit.

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