cisco ccna hands-on labs

cisco ccna hands-on labs

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(1) Understand the role of CA certification through the Internet . (2) Mutual isolation of information: the isolation of order information and personal account information. When an order containing cardholder account information is sent to the merchant, the merchant can only see the order information, but not the cardholder's account information. If the conditions match, access is denied 1. Password cracker 1.6.2 Information Security Protection Technology Table . 8 - . 1 described POP3 command 2. Trust chain and blacklist issuance (1) If you are familiar with script files, such as web designers, you can find some familiar ones ip address command parameters / options This is not a real scan. But sometimes through Ping , it is very useful to judge whether the host on a network is powered on. (3) Use of anti-spam software. (7) The recipient B key with a symmetric SK by the DES algorithm to decrypt the encrypted information E , to restore the original information, digital signature name DS and the sender A public key certificate PB A . Port 5.5.6 Do audit work well An Internet worm is an independent program that can run without the intervention of computer users. It spreads by continuously gaining some or all of the control rights on the vulnerable computers in the network. The biggest difference between a worm and an ordinary virus is that it does not require human intervention, and can replicate and spread autonomously and continuously. (1) Link encryption means that the transmitted data is only encrypted at the data link layer on the physical layer, regardless of the source and sink. It is used to protect data between communication nodes. The receiver is each node machine on the transmission path, and the data must be decrypted and re-encrypted in each node machine ,cisco ccna hands-on labs, in turn, until it reaches the destination. Figure 4.3 Digital signature operation process The current local area network basically uses the Ethernet technology based on broadcast technology. The communication data packets between any two nodes are not only received by the network cards of these two nodes, but also can be received by any network on the same Ethernet. Intercepted by the network card of a node. Therefore, as long as hackers access any node on the Ethernet to listen, they can capture all data packets transmitted on this Ethernet, unpack them and analyze them, thereby stealing key information, which is an inherent security risk of Ethernet. In order to provide a safe, reliable, and completely transparent data transmission to the upper application on the network, you can consider encrypting and decrypting network data at the link layer, and integrating the encryption module into the network card driver. This allows it to work seamlessly with other network devices to protect the entire network data.

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Latest Cisco CCNA 200-301 Dumps

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