ccna 2.0

ccna 2.0

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When the virus program runs for the first time, the virus will periodically detect each driver at a certain time interval Type B : 255.255.0.0 The operating system is based on level 1 and level 2 . Operating systems above level 4 are quite different from the previous level 3 . (1) Master the working principle of E-mail service. (. 5) Client → Server : User cnhawk to Server provides cnhawk , the TGT and host / s ; Server according saved on the host host / s and user cnhawk to the authentication information cnhawk registration application. 1.6.2 Information Security Protection Technology Another example is Windows NT is vulnerable to larger ICMP packets. If you send a Ping command, specify the package large small as 64KB , Windows NT 's TCP / IP stack will not work properly, it makes the system offline until restart, resulting in denial of access to certain services. (3) Any data entering the public internal network must undergo security authentication and encryption. (2) The role for the bank is: ① Use the private key to decrypt payment and financial data; ② Use the merchant's public key to encrypt the purchaser's payment notice. The listener Oscar can only monitor X and Y on the network , but cannot calculate x and y from X and Y. Therefore, (4) Permission settings. Specify the scope of qualifications for legitimate users to access network information resources, that is, reflect what operations can be performed on the resources. (1) Guess the simple password: Many people use a few of their own or family members’ birthday, phone number, room number, simple numbers, or ID number; others use the names of themselves, children, spouses or pets; and the pipe system administrator using the password , do not even password, a hacker can easily get the password by conjecture. It is difficult to contain the broadcast,ccna 2.0, coupled with the integration with hacker technology, the potential threats and losses are even greater. From the perspective of development trends, the current virus has changed from a single transmission and single behavior in the past to a reliance on Internet transmission. It has multiple transmission methods such as email and file transmission, and combines multiple attack methods such as hackers and Trojan horses. The " new virus " in a broad sense .

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