ccna lab book pdf

ccna lab book pdf

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Abbreviate the network mask 0.0.0.0 as 0 . Setting a default route is a relatively common situation (6) The virus will check the network status every 20s at an interval of 20s . When the network is available,ccna lab book pdf, the virus will be locally ③ Type enable and press Enter . 1. Prelude to the attack 1) Implementation tools and environment (2) The virus will generate two virus files when infecting the folder: Desktop.ini and Folder.htt . auto -set the automatic Ethernet speed. Specifies the netmask applied to ip_address . Use 0.0.0.0 to specify a default route. can Described above WWW server and E-mail server etc. ) are placed in the surrounding network, which also reduces the security risk of the internal network. The structure of this firewall is shown in Figure 5.5 . This structure is in line with the five requirements we put forward and should be the safest precaution mode. The security of a symmetric cryptosystem depends on the following two factors. First, the encryption algorithm must be strong enough. It is practically impossible to decrypt information based on the cipher text itself. Second, the security of the encryption method depends on the secrecy of the key, not the secrecy of the algorithm. Therefore, we do not need to ensure the secrecy of the algorithm, but need to ensure the secrecy of the key . The algorithm implementation speed of the symmetric encryption system is extremely fast. From the test results of the AES candidate algorithm, the software implementation speed has reached several or tens of megabits per second. These characteristics of symmetric cryptosystem make it widely used. Because the algorithm does not need to be kept secret, manufacturers can develop low-cost chips to achieve data encryption. These chips have a wide range of applications and are suitable for mass production.

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Latest Cisco CCNA 200-301 Dumps

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