Intrusion Detection: Intrusion detection monitors local area networks for unauthorized access by hackers.
Packet Sniffing: A packet sniffer is a program that inspects every packet of information that passes through the network.
Vulnerability Scanning: A vulnerability scanner will periodically scan the network for vulnerabilities and weaknesses which open up the potential for an exploit.
Firewall Monitoring: Firewalls monitor the traffic that is coming in and out of the network.
Penetration Testing: Penetration testing is carried out by IT professionals by using methods that hackers use to breach a network.