  The rapid development of computer network system brings both a great
convenience and new security threats for users. Network security problem
generally includes network system security and data security. Specifically, it
refers to the reliability of network system, confidentiality, integrity and
availability of data information in the system. This paper introduces the
significance of network security systems and highlights related technologies,
mainly authentication, data encryption, firewall and antivirus technology.
Network security problems can be faced by any network user, therefore we must
greatly prioritize network security, try to prevent hostile attacks and ensure
the overall security of the network system.
