--Originally published at Computer and Information Security
Network security refers to activities designed to protect a network. These activities protect the usability, reliability, integrity, and safety of a network and data.
There isn’t a single solution that protects a network from a variety of threats. Multiple layers of security are needed. Network security is accomplished through hardware and software.
A network security system usually consists of many components. Network security components often include:
1. Anti-virus and anti-spyware
2. Firewalls, to block unauthorized access to your network
3. Intrusion prevention systems
4. Virtual Private Networks (VPNs), to provide secure remote access
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