Seven unique features of computer viruses in Local Area Networks

Why cannot I completely clear Network viruses with a single-host version? This is mainly because the network virus has its unique network characteristics. Currently, there is no standard concept for network viruses, but for viruses that can be transmitted within the LAN, they are collectively referred to as network viruses. In a network environment, Network Viruses not only share the common characteristics of computer viruses such as propagation, enforceability, and destructiveness, but also have some new features:

1. Fast Infection: in a single-host environment, viruses can only be carried from one computer to another through a floppy disk, while in the network, viruses can rapidly spread through network communication mechanisms. According to tests, for a typical PC Network in normal use, as long as one workstation has a virus, it can infect hundreds of computers on the Internet within dozens of minutes.

2. Wide spread: Because viruses spread very quickly in the network and the Spread scope is very large, it not only can quickly infect all computers in the LAN, the Remote Workstation can also spread the virus thousands of miles away in an instant.

3. The transmission forms are complex and diverse: computer viruses are generally transmitted over the network through the "workstation-server-workstation" approach, but the transmission forms are complex and diverse.

4. Difficult to completely clear: computer viruses on a single machine can sometimes be deleted by deleting files with viruses. Low-level formatting of hard disks and other measures to completely clear the virus, and as long as a workstation in the network fails to sanitize, the entire network can be re-infected with virus, even a workstation that has just completed the cleanup may be infected by another infected workstation on the Internet. Therefore, removing viruses from workstation alone cannot solve the harm of viruses on the network.

5. High destructiveness: viruses on the network will directly affect the work of the Network, reducing the speed and affecting the work efficiency. The network will crash and destroy the server information, so that many years of work will be ruined.

6. testability: The network virus can be stimulated by a variety of conditions, such as internal clock, system date and user name, or a network communication. A virus program can inspire and launch attacks on a workstation according to the requirements of the virus designer.

7. Potential: Once the network is infected with a virus, the potential risk is enormous even if the virus has been cleared. According to statistics, after the virus is cleared on the network, 85% of the network will be infected again within 30 days.

Because of the unique characteristics of LAN viruses, the viruses spread rapidly through LAN in various forms. They attack clients, servers, and gateways, and the single-host virus can no longer effectively solve the problem, in this case, the web-based anti-virus software is required to completely clean up.