ch 7 ccna exam

ch 7 ccna exam

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Briefly describe the impact of CIH virus on the system. The above is the technical realization principle and the whole process of the operability, security and digital signature that are commonly used in current electronic signatures. (57 344B) . (2) Intrusion detection systems (Intrusion Detection the System , the IDS) . It is a program or hardware executive body that performs intrusion detection functions at the inspection location in the system ,ch 7 ccna exam, which can monitor the current system resources and status and detect possible intrusions. (2) System.ini : The name of the program after Shell=Explorer.exe . The first step: the installation of the Trojan server program. (2) System.ini : The name of the program after Shell=Explorer.exe . Users can use the Netstat command to check the current status of the connection line to see if there is a SYN Flood attack. As long as the line is in the SYN-Received state, it indicates that the system may be under attack. } The DES algorithm is used for mutual authentication and MAC verification of financial transaction data packets . (1) Host: A computer system connected to a network system. 5) Built into the registry Operational safety refers to the continuous and normal operation of the protection system. nat_id 1) The concept of digital certificates 9. Client certificate ④ E-mail subject (Subject) . When using FTP , it should be noted that whether to log in to the FTP server in PASV or PORT mode , the choice is on the FTP client. IDEA encrypts information, while RSA is used to pass the session key. If classified according to the number of bits processed for each encryption, the encryption algorithm can be divided into serial ciphers and block ciphers. The former only encrypts one bit at a time, while the latter lists the information first (1) There are a large number of TCP connections waiting on the attacked host . = 8 17 mod 33 (2) virus creates a named runtime system BILLY mutex, the purpose is to ensure that there is a memory in parts of virions, it was found to prevent the user. →"Capture Screen"→"Screen Control" command ) . The rest is the same as executing the "view screen" command. \Control Panal , find the binary values Settings , Links , SecAddsites in the right half of the window . An example of when to use the conduit command is to use ICMP messages to test connectivity through the PIX . In order to allow the echo request from outside (Ping) through PIX firewall must be configured to a pipe (Conduit) . Moreover, external users must have a target IP address available. You can use the static command to map this information on the PIX firewall. The concept of computer virus actually originated very early years, the pioneers of the computer Feng before the first commercial computer to launch Neumann (John Von Neumann) knowledge in the theory of his papers "complex automatic devices and groups get on" 1) Discovery and removal of shock wave virus 1. High-strength encryption and authentication 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. (4) Define the IP address for the internal interface . The certificate issued by Universal CA does not depend on fixed internal users. Only one E-mail address is needed to apply and apply the certificate, so it has a wide range of applications. (1) Data encryption. Cryptography is recognized as the most practical way to protect network information security. The most effective protection for data is encryption, because the encryption method can be implemented by different means. When configuring the PIX firewall at the beginning , you can use the nat 10.0.0.0 0.0.0.0 command to allow all internal hosts to connect to the outside world. The Nat 10.0.0.0 0.0.0.0 command will enable NAT and let all internal hosts ( specified as (5) Use the address command to specify the IP address of the Cisco PIX 515 firewall interface . (1) Master the working mode of FTP service. proxy (2) Familiar with the process of creating digital certificates and implementing digital signatures. ⑦ The window will display firewall startup information. 4. Verification process of digital signature A single IP address, or the starting IP address of a global IP address range ⑤ Select /scripts and replace 271 with 201 . FunLove is a WIN32 type virus, it can infect computers with Windows 9x and Windows NT 4.0 operating systems , and infect all WIN32 type files (PE files ) , such as Windows and Program Files directories and their subdirectories with the extension .exe , .Scr and .ocx files. The virus searches for all networks to share files with write access to all files and folders infection there, while being able to repair Windows NT integrity testing environment in order to be able to infect the system files. The virus is a memory-resident WIN32 virus, which is neither encrypted nor polymorphic. It infects PE. EXE files in the local and network . The virus itself is a PE executable file with only the .code part . The virus can also repair the integrity check of the Windows NT environment so that it can infect system files.

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