Network Layers

Below is a list of the different layers that makes up the open systems interconnection (OSI) model ↗ and the associated Cloudflare products.

Note

The list of related products is representative but not comprehensive.

Network layer	Protocol and related products
7 Application layer	HTTP, DNS Authoritative DNS, Bot Management, CDN, Cloudflare Access, Cloudflare Gateway (outbound only), Cloudflare Tunnel, Load Balancing, Stream, WAF
6 Presentation layer
5 Session layer
4 Transport layer	TCP/UDP Argo Smart Routing, Cloudflare Gateway (outbound only), Load Balancing, Spectrum
3 Network layer	IP, GRE, any packet/protocol Magic Firewall, Magic Transit, Magic WAN
2 Datalink layer	Direct connection Cloudflare Network Interconnect (CNI)
1 Physical layer	Direct connection Cloudflare Network Interconnect (CNI)