NetScout's Arbor combines on-premise DDoS defense with cloud-based traffic scrubbing services that are tightly integrated via an automated cloud signal.
i.e : Both on Cloud & in-premise protection from DDoS
Cloud Only Services
- CDN (Content Delivery Network) providers utilize their distributed infrastructure to absorb and mitigate attacks towards the assets that are served by their CDN.
- Traffic diversion-based services usually offer more flexibility and are typically run by dedicated companies or business units of large ISPs.
NetScout's DDos In-premise Services Whitepaper - Link