Which technology is used to power a many-to-many defense in DDoS mitigation?

• A. Anycast
• B. NAT
• C. VPN
• D. MPLS

Answer: (A)

Anycast enables a many-to-many defense in DDoS mitigation by letting multiple data centers advertise the same service IP. Packets are routed by the Internet to the nearest or best-performing center, spreading flood traffic across several locations. This distributes the load and scrubbing capacity, so no single site becomes overwhelmed and legitimate traffic can still reach users. The distributed setup makes it much harder for an attacker to saturate the service, since traffic can be absorbed and filtered at multiple points. Other technologies like NAT, VPN, or MPLS serve different purposes—address translation, secure tunnels, and controlled paths—without providing the same broad, multi-site defense mechanism.