Examine the following items, which one offers a variety of security solutions, including firewall,
IPS, VPN, antispyware, antivirus, and antiphishing features?

A.
Cisco IOS router

B.
Cisco PIX 500 series security appliance

C.
Cisco 4200 series IPS appliance

D.
Cisco ASA 5500 series security appliance

Explanation: