单项选择题
A.Cisco Firewall Services Module (FWSM)
B.Cisco Private Internet Exchange (PIX) Firewall
C.Cisco VPN/Security Management Solution (VMS)
D.Cisco Internetwork Operating System (IOS) Firewall
单项选择题 Wide Area Network (WAN) is a computer network that covers a broad areA. Which statement is correct for wide-area network (WAN)?（）
单项选择题 Cisco Technical Support Services portfolio provide customers resources that help ensure that Cisco products operate efficiently, remain highly available, and benefit from up-to-date system software. Is it correct?（）
单项选择题 Which cisco product portfolio allows users to access their email, voice, and fax messages from A single inbox anytime, anywhere?（）