What is the name of a single device that is based on a firewall but that has been expanded and improved to perform a wide variety of services, such as filtering, IPS, antivirus scanning, anti-spam filtering, VPN endpoint hosting, content filtering, load-balancing, and detailed logging?
A. Load balanced filtering
B. Port based network access (admission) control
C. Unified threat management
D. Multifactor authentication
E. IEEE 802.1x
Answer: C