- rfc5015: Bidirectional Protocol Independent Multicast (BIDIR-PIM)
- rfc5036: LDP Specification
- rfc5059: Bootstrap Router (BSR) Mechanism for Protocol Independent Multicast (PIM)
- rfc5072: IP Version 6 over PPP
- rfc5080: Common Remote Authentication Dial In User Service (RADIUS) Implementation Issues and Suggested Fixes
- rfc5095: Deprecation of Type 0 Routing Headers in IPv6
- rfc5101: Specification of the IP Flow Information Export (IPFIX) Protocol for the Exchange of IP Traffic Flow Information
- rfc5102: Information Model for IP Flow Information Export
- rfc5103: Bidirectional Flow Export Using IP Flow Information Export (IPFIX)
- rfc5214: Intra-Site Automatic Tunnel Addressing Protocol (ISATAP)
- rfc5228: Sieve: An Email Filtering Language
- rfc5229: Sieve Email Filtering: Variables Extension
- rfc5230: Sieve Email Filtering: Vacation Extension
- rfc5231: Sieve Email Filtering: Relational Extension
- rfc5232: Sieve Email Filtering: Imap4flags Extension
- rfc5233: Sieve Email Filtering: Subaddress Extension
- rfc5235: Sieve Email Filtering: Spamtest and Virustest Extensions