Revealing the unique characteristics of computer virus in LAN

Why the network virus with stand-alone version can not be completely eliminated? Mainly because the network virus has its unique network characteristics. At present, the network virus does not have a standard concept, but for the LAN can be transmitted in the virus, collectively known as the Network virus. In the network environment, the network virus besides has the dissemination, the enforceability, the destructive and so on computer virus's commonness, but also has some new characteristics:

1, infection speed: In a stand-alone environment, the virus can only be taken from one computer to another through a floppy disk, while in the network can be spread through the network communication mechanism. According to the measurement, for a typical PC network in normal use, as long as one workstation has a virus, can be in a few 10 minutes online hundreds of computers all infected.

2, spread widely: Because the virus spread very fast in the network, spread a large range, not only can quickly infect all the computers in the LAN, but also through the remote workstation will spread the virus in a flash to thousands of miles away.

3, the spread of the form of complex and diverse: computer Viruses in the network is generally through the "workstation-server-Workstation" approach to spread, but the form of communication is complex and diverse.

4, it is difficult to completely clear: computer viruses on a single machine can sometimes be deleted with poison files. Low-level formatted hard drives and other measures to completely eliminate the virus, and the network as long as a workstation could not be disinfected clean can make the entire network to be infected with the virus, or even just completed the cleanup work of a workstation is likely to be another network with a poison workstation infection. Therefore, only the workstation for virus killing, and can not solve the virus on the network harm.

5, Destructive: Network virus will directly affect the work of the network, light to reduce speed, affect work efficiency, heavy to make the network crash, destroying server information, so that many years of work destroyed.

6, the excitation: network virus to stimulate the diversity of conditions, can be internal clock, the system date and user name, can also be a network of communication. A virus program can fire and issue an attack on a workstation, as required by the virus designer.

7, the potential of the network once infected with the virus, even if the virus has been cleared, its potential danger is enormous. According to statistics, after the virus is cleared on the network, 85% of the network will be infected again within 30 days.

It is because of the unique characteristics of local area network virus, the virus in a variety of forms with the rapid spread of the local area network, they attack clients, servers, gateways, stand-alone anti-virus has been unable to effectively solve the problem, then need the network version of anti-virus software to completely clear.

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