Network data requires encryption to prevent eavesdropping as part of network security management. Another important security issue is availability of services in a network, certain servers must always be capable of responding to the demands of users.
There is software for this purpose, a firewall is a security mechanism that can block access to computers in a network. Firewalls are also found in network hardware. Firms sometimes use intranet to provide information only to the staff on password protected local network and for extranet to securely communicate with customers and providers of content or data.
Round-the-clock monitoring — service providers monitor the system to ensure performance remains consistently high. Network Convergence — provides the ability to leverage the power of data and voice traffic on the same network to reduce costs. Disaster or redundancy recovery — the majority of service providers offer continuity plans for both data and voice.