Network Layers

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

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)