| RFC 2501 | | Mobile Ad hoc Networking (MANET): Routing Protocol Performance Issues and Evaluation Considerations. S. Corson, J. Macker. January 1999. |
| RFC 2502 | | Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast Environment. M. Pullen, M. Myjak, C. Bouwens. February 1999. |
| RFC 2503 | | MIME Types for Use with the ISO ILL Protocol. R. Moulton, M. Needleman. February 1999. |
| RFC 2504 | | Users' Security Handbook. E. Guttman, L. Leong, G. Malkin. February 1999. |
| RFC 2505 | | Anti-Spam Recommendations for SMTP MTAs. G. Lindberg. February 1999. |
| RFC 2506 | | Media Feature Tag Registration Procedure. K. Holtman, A. Mutz, T. Hardie. March 1999. |
| RFC 2507 | | IP Header Compression. M. Degermark, B. Nordgren, S. Pink. February 1999. |
| RFC 2508 | | Compressing IP/UDP/RTP Headers for Low-Speed Serial Links. S. Casner, V. Jacobson. February 1999. |
| RFC 2509 | | IP Header Compression over PPP. M. Engan, S. Casner, C. Bormann. February 1999. |
| RFC 2510 | | Internet X.509 Public Key Infrastructure Certificate Management Protocols. C. Adams, S. Farrell. March 1999. |
| RFC 2511 | | Internet X.509 Certificate Request Message Format. M. Myers, C. Adams, D. Solo, D. Kemp. March 1999. |
| RFC 2512 | | Accounting Information for ATM Networks. K. McCloghrie, J. Heinanen, W. Greene, A. Prasad. February 1999. |
| RFC 2513 | | Managed Objects for Controlling the Collection and Storage of Accounting Information for Connection-Oriented Networks. K. McCloghrie, J. Heinanen, W. Greene, A. Prasad. February 1999. |
| RFC 2514 | | Definitions of Textual Conventions and OBJECT-IDENTITIES for ATM Management. M. Noto, E. Spiegel, K. Tesink. February 1999. |
| RFC 2515 | | Definitions of Managed Objects for ATM Management. K. Tesink, Ed. February 1999. |
| RFC 2516 | | A Method for Transmitting PPP Over Ethernet (PPPoE). L. Mamakos, K. Lidl, J. Evarts, D. Carrel, D. Simone, R. Wheeler. February 1999. |
| RFC 2517 | | Building Directories from DNS: Experiences from WWWSeeker. R. Moats, R. Huber. February 1999. |
| RFC 2518 | | HTTP Extensions for Distributed Authoring -- WEBDAV. Y. Goland, E. Whitehead, A. Faizi, S. Carter, D. Jensen. February 1999. |
| RFC 2519 | | A Framework for Inter-Domain Route Aggregation. E. Chen, J. Stewart. February 1999. |
| RFC 2520 | | NHRP with Mobile NHCs. J. Luciani, H. Suzuki, N. Doraswamy, D. Horton. February 1999. | |
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