A major concern of network management is data security. Maintaining LAN data security means:
# maintaining data integrity
# securing the LAN from unauthorized access
# securing the LAN from computer viruses
# ensuring the availability of network components and access.
Because security is a primary concern and responsibility of network managers, you will not normally be given direct access to network settings and configurations when working on network printer installations.
The protection of a network’s data resource is achieved in a number of ways:
# by the use of uninterruptible power supplies (UPS) to allow the network and servers long enough to keep running through minor power outages and to shut down gracefully during long outage
# by providing redundant hardware, including redundant hard drives, so that secondary systems can take over in the event of the failure of the primary system
# by regular backups of data, so that in the event of a loss of integrity data can be restored with a minimum of lost work.
Protection from unauthorized access
Most networks have a system allowing access to only authorised users. Security systems can
allocate rights such as access to resources like applications, printers, directories and specific files. Normal security requires that users have a unique ID and password to access network resources. If an organisation wishes to grant an external user access to the network, a user ID and password will have to be issued, for a limited period of time.