单项选择题
Which software-based security threat is typically spread from user to user via e-mail?（）
A.Virus
B.Trojan horse
C.Denial of service
D.Data interception
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单项选择题
Which Cisco product is a hardware component that supports content filtering and other gateway security functions for the Catalyst 6500 Series?（）
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)?（）
A.Connects client devices wireless protocol
B.Crosses metropolitan, regional, or national boundaries
C.Limited in a single building, a group of buildings, or even a single room
D.Encompasses an entire city or metropolitan area and connects multiple local-area networks (LANs) -
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?（）
A.Yes
B.No
