Analysis of the hazards and prevention of computer virus
Computer viruses classification
In short, computer viruses are those that are self-replicating ability of a computer program, it can affect computer software, hardware, the normal operation of the correct and complete destruction of data. Many different types of computer viruses, different types of viruses have their own different characteristics, they are there mainly to infected files, some of the main boot sector of infected systems, most of the virus is only open a little joke, but a few viruses are have done great harm, which requires people to adopt appropriate methods to classify the virus in order to further meet the needs of daily operations.
Classification according to mode of transmission. Classified according to mode of transmission can be divided into boot virus, file virus and three kinds of mixed-type virus. Guide-type virus is mainly infected disk boot sector, the system from the disk that contains the virus starts communication, it is generally not a disk file for infection; file virus is generally transmitted on the disk can perform file (COM, EXE), is characterized by attached to the normal program file into the program file in a shell or components; mixed-type virus are the characteristics of both the above two kinds of virus, both infected with boot sector has infected files, so the expansion of this mode of transmission.
The connection classification. Then connection category can be divided into source-type virus, intrusion-type virus and operating system, such as three kinds of viruses. Source-type virus, which attacks the high-level language source program, it will insert itself into the system source program, and, together with the source code to compile, link into executable files, causing just the resulting executable file directly to carriers of the virus; invasion virus with its own operating system to replace part of the department to join or replace functionality, greater harm.
Classification according to the procedure operating platform. Operating platform virus, according to the procedure can be divided into DOS viruses, Windows viruses, WindowsNT virus, OS / 2 viruses, etc. They are the attack on the DOS, Windows9X, WindowsNT, OS / 2 operating system platforms, such as viruses.
A new virus. Part of the new virus because of its distinctive character, temporarily unable to type in accordance with the previous classifications, such as macro viruses (using an application's own macro programming language of the virus), hacking software, e-mail virus.
In short, computer viruses are those that are self-replicating ability of a computer program, it can affect computer software, hardware, the normal operation of the correct and complete destruction of data. Many different types of computer viruses, different types of viruses have their own different characteristics, they are there mainly to infected files, some of the main boot sector of infected systems, most of the virus is only open a little joke, but a few viruses are have done great harm, which requires people to adopt appropriate methods to classify the virus in order to further meet the needs of daily operations.
Classification according to mode of transmission. Classified according to mode of transmission can be divided into boot virus, file virus and three kinds of mixed-type virus. Guide-type virus is mainly infected disk boot sector, the system from the disk that contains the virus starts communication, it is generally not a disk file for infection; file virus is generally transmitted on the disk can perform file (COM, EXE), is characterized by attached to the normal program file into the program file in a shell or components; mixed-type virus are the characteristics of both the above two kinds of virus, both infected with boot sector has infected files, so the expansion of this mode of transmission.
The connection classification. Then connection category can be divided into source-type virus, intrusion-type virus and operating system, such as three kinds of viruses. Source-type virus, which attacks the high-level language source program, it will insert itself into the system source program, and, together with the source code to compile, link into executable files, causing just the resulting executable file directly to carriers of the virus; invasion virus with its own operating system to replace part of the department to join or replace functionality, greater harm.
Classification according to the procedure operating platform. Operating platform virus, according to the procedure can be divided into DOS viruses, Windows viruses, WindowsNT virus, OS / 2 viruses, etc. They are the attack on the DOS, Windows9X, WindowsNT, OS / 2 operating system platforms, such as viruses.
A new virus. Part of the new virus because of its distinctive character, temporarily unable to type in accordance with the previous classifications, such as macro viruses (using an application's own macro programming language of the virus), hacking software, e-mail virus.
