Discuss scripting and how it relates to network security.

What will be an ideal response?

A widespread network intrusion that is increasing in frequency and severity is the use of scripts-executable code attached to e-mail messages or downloaded files that infiltrates a system. It can be difficult for a firewall or intrusion-detection system (IDS) to block all such files; specialty firewalls and other programs should be integrated with existing security systems to keep scripts from infecting a network.