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Requirements for Internet hosts - communication layers (RFC1122)

IP.com Disclosure Number: IPCOM000001932D
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2000-Sep-12

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.T. Braden: AUTHOR

Abstract

This document is one of a pair that defines and discusses the requirements for host system implementations of the Internet protocol suite. This RFC covers the communication protocol layers: link layer, IP layer, and transport layer. Its companion RFC, "Requirements for Internet Hosts -- Application and Support" [INTRO:1], covers the application layer protocols. This document should also be read in conjunction with "Requirements for Internet Gateways" [INTRO:2].

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 1% of the total text.

Network Working Group Internet Engineering Task Force

Request for Comments: 1122 R. Braden, Editor

October 1989

Requirements for Internet Hosts -- Communication Layers

Status of This Memo

This RFC is an official specification for the Internet community. It

incorporates by reference, amends, corrects, and supplements the

primary protocol standards documents relating to hosts. Distribution

of this document is unlimited.

Summary

This is one RFC of a pair that defines and discusses the requirements

for Internet host software. This RFC covers the communications

protocol layers: link layer, IP layer, and transport layer; its

companion RFC-1123 covers the application and support protocols.

Table of Contents

1. INTRODUCTION ............................................... 5

1.1 The Internet Architecture .............................. 6

1.1.1 Internet Hosts .................................... 6

1.1.2 Architectural Assumptions ......................... 7

1.1.3 Internet Protocol Suite ........................... 8

1.1.4 Embedded Gateway Code ............................. 10

1.2 General Considerations ................................. 12

1.2.1 Continuing Internet Evolution ..................... 12

1.2.2 Robustness Principle .............................. 12

1.2.3 Error Logging ..................................... 13

1.2.4 Configuration ..................................... 14

1.3 Reading this Document .................................. 15

1.3.1 Organization ...................................... 15

1.3.2 Requirements ...................................... 16

1.3.3 Terminology ....................................... 17

1.4 Acknowledgments ........................................ 20

2. LINK LAYER .................................................. 21

2.1 INTRODUCTION ........................................... 21

RFC1122 INTRODUCTION October 1989

2.2 PROTOCOL WALK-THROUGH .................................. 21

2.3 SPECIFIC ISSUES ........................................ 21

2.3.1 Trailer Protocol Negotiation ...................... 21

2.3.2 Address Resolution Protocol -- ARP ................ 22

2.3.2.1 ARP Cache Validation ......................... 22

2.3.2.2 ARP Packet Queue ............................. 24

2.3.3 Ethernet and IEEE 802 Encapsulation ............... 24

2.4 LINK/INTERNET LAYER INTERFACE .......................... 25

2.5 LINK LAYER REQUIREMENTS SUMMARY ........................ 26

3. INTERNET LAYER PROTOCOLS .................................... 27

3.1 INTRODUCTION ............................