examen capitulo 6 cisco ccna 2

examen capitulo 6 cisco ccna 2

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However, after 20 years of use, it has been found that DES many shortcomings of DES crack method of day also increasingly effective. AES ( Advanced Encryption Standard ) will replace DES as a new generation encryption standard. How much my year-salary now? NO more than $5 500. 3. Distributed denial of service attack Security requirements of e-commerce foreign_mask Network security threats and the development trend of corresponding countermeasures (4) Spread through point-to-point communication systems and wireless channels. An interesting feature of the FTP protocol is that it supports proxy FTP connections. I.e. intruder from their basis computer a.com and destination hosts target.com the FTP server-PI ( Protocol Interpreter ) connection, establishing a control communication link (5) Use firewall software to ban the virus from ports 135 , 4444 , 69, etc., or use the " TCP/IP filtering " function to ban these ports. This refers to a traditional symmetric key encryption / decryption method of identification and signature. Party A needs Party B to sign an electronic document. Party A can generate a random code and send it to Party B. Party B uses the symmetric key agreed upon by both parties to encrypt the random code and send the electronic document back to Party A. Party A uses the same symmetric secret key. After the key is decrypted, the message is obtained and the random code is checked . If the random code is checked correctly, Party A can think that the message comes from Party B. This method solves " What you know " (What you know) . It is suitable for remote network transmission, but not suitable for large-scale crowd authentication, because symmetric key management is difficult. In symmetric key encryption / decryption authentication, ID+PIN ( identity unique identification + password ) is often used in practical applications . That is, the sender encrypts the ID and PIN with a symmetric key and sends it to the receiver. After decryption,examen capitulo 6 cisco ccna 2, the receiver compares with the ID and password stored in the background to achieve the purpose of authentication. The bank cards that people use in their daily lives use this authentication method. This method solved is "What" (the What you have have) and "What do you know?" (The What you know) . It is suitable for remote network transmission, and it is not suitable for electronic signature due to the difficulty of symmetric key management.

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Latest Cisco CCNA 200-301 Dumps

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