The Cisco network-based virtual firewall service solution helps service providers to deliver costeffective, scalable, integrated security services for enterprise customers using Cisco platforms
.What is a virtual firewall?

A.
another name for a firewall deployed in routed mode

B.
another name for a firewall deployed in transparent mode

C.
a separation of multiple firewall security contexts on a single firewall

D.
a firewall that, when deployed in routed mode, can support up to 1000 VLANs per context