グレーのバックは、後発のRFCにより廃棄されたことを示す。

(原典:rfc-index.txt, std-index.txt

STD0007 : Transmission Control Protocol
RFC0793 Transmission Control Protocol J. Postel Updated by RFC3168
Sep-01-1981 TXT=172710 bytes STANDARD
RFC3168 The Addition of Explicit Congestion Notification (ECN) to IP K. Ramakrishnan
S. Floyd
D. Black
Obsoletes RFC2481
Updates RFC2474
RFC2401
RFC0793
September 2001 TXT=170966 bytes PROPOSED STANDARD