单选题A service provider wants to prevent the repeat of a denial of service (DoS) attack that recently disabled Internet access for several thousand customers. Which Cisco solution best matches this business need?（）ANetwork securityBWireless networkCContent networkingDVirtual Private Network (VPN)
单选题
A service provider wants to prevent the repeat of a denial of service (DoS) attack that recently disabled Internet access for several thousand customers. Which Cisco solution best matches this business need?（）
A
Network security
B
Wireless network
C
Content networking
D
Virtual Private Network (VPN)
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