Circuit level gateway
Operates at the session layer and inspects the traffic during the establishment of the initial session over TCP or UDP
Proxy server
A device that acts as a middle man between a device and a remote server
Honeypot
A single computer that might be attractive to an attacker
Honeynet
A group of computers , servers or networks used to attract an attacker
DLP
Data loss prevention: Used to ensure your private data remains secure
Unified threat management
Combination of network security devices and technologies to provide a more defense in depth within a single device