man7p - Protocols

arp(7p): arp, ARP - Address Resolution Protocol
dlpi(7p): dlpi - Data Link Provider Interface
icmp(7p): icmp, ICMP - Internet Control Message Protocol
icmp6(7p): icmp6 - Internet Control Message Protocol for Internet Protocol Version 6
if_tcp(7p): if_tcp, if - general properties of Internet Protocol network interfaces
inet(7p): inet - Internet protocol family
inet6(7p): inet6 - Internet protocol family for Internet Protocol version 6
ip(7p): ip, IP - Internet Protocol
ip6(7p): ip6 - Internet Protocol Version 6
ipsec(7p): ipsec - Internet Protocol Security Architecture
ipsecah(7p): ipsecah, AH - IPsec Authentication Header
ipsecesp(7p): ipsecesp, ESP - IPsec Encapsulating Security Payload
ndp(7p): ndp, NDP — Neighbor Discovery Protocol
pf_key(7p): pf_key - Security association database interface
rarp(7p): rarp, RARP - Reverse address resolution protocol
route(7p): route - kernel packet forwarding database
routing(7p): routing - system support for packet network routing
sctp(7p): sctp, SCTP - Stream Control Transmission Protocol
sip(7p): sip - SIP Proxy/registrar/redirect server
slp(7p): slp - Service Location Protocol
tcp(7p): tcp, TCP — Internet Transmission Control Protocol
udp(7p): udp, UDP - Internet User Datagram Protocol
vxlan(7p): VXLAN, vxlan — Virtual eXtensible Local Area Network