The computer network security encompasses the policies and procedures adopted by the network administrators to monitor and prevent any kind of unauthorized access, modification, or misuse of accessible resources. It includes the access authorization of data in network, controlled by network administrator.
The administrator provides ID and password to the users to access the programs and information. It includes various modes like the private and public networks. It can be private i.e. within the organization or it might be opened for public access.
The computer network security must cover all the aspects of network, ranging from desktop to other peripherals. The multilayered and multifaceted approach to a network security for business or organizations renders excellent protection against external threats and internal threats as well.
For small network or for single computer system, a router along with integrated firewall is sufficient. On the other hand, for large network the most appropriate option is the dedicated firewall within the network perimeter. There are many good dedicated firewall applications that can allow for secure VPN connectivity. The important functions of dedicated firewalls are inspection, blocking, and reporting of malicious network.
One of the best complements for dedicated firewall is the content filtering device. Such devices are usually helpful for monitoring filtering, regulating, and reporting of all the web related traffic. The content filters are installed between the internal switch and firewall or router. The outbound and inbound traffic of internet have to pass through such filters. They are usually referred as bridged mode.
Effective monitoring is of utmost importance for computer network security. It helps in competent management of networks, in which the activity log of routers and varied servers can be closely watched and reported.
Moreover, the servers and desktops must have anti spyware and antivirus protection. Today, myriad of threat protection software for enterprise levels are available in the marketplace. The most suitable and ideal threat protection application must be cost effective, and it should provide daily updates of virus definition. Additionally, it should have centralized reporting and management system and active protection for runtime security.
Another aspect of computer network security is assigning permissions to various users in the network. For example, top management might want to assess the systems of their subordinates or teams. They will be granted with limited admin rights to handle their group. They might not necessarily be given the admin rights for the entire networks. You could also block the users from installing software from their workstations. Similarly, you could also prevent them from accessing their systems through portable storage devices. Basically, the entire network infrastructure has to be mapped clearly.
Lastly, the physical security measures are also very important for the overall security aspects of computer network. In order to achieve this, the servers must be kept in secured server rooms with regulated access. It is also better to check the security of the backup media, be it off-site or on-site. Remember that the critical information about your company cannot get into wrong hands, and therefore it is very important to secure your networks, in order to sail towards your business goals.