Cloudflare CDN is also a cloud-based content delivery service that specializes in cyber security, particularly against Distributed Denial of Service (DDoS) attacks, and boasts a network that spans more than 250 cities and more than 100 countries. Cloudflare supports TLS as well as HTTP/3, the latest security protocol to emerge in 2021. HTTP/3 runs on QUIC, which is a new internet transport protocol that automatically encrypts and authenticates data, making it faster than data transfer that happens via TLS. See our comparison of Fastly vs Cloudflare now.