Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 13

Preface Conventions • Appendix D, "Common Port Assignments"-Describes the currently assigned Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) port numbers. • Index Conventions This guide uses the conventions described in the following sections for instructions and information. Notes, Cautions, and Timesavers Notes, cautions and time-saving tips use the following conventions and symbols: Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in this guide. Caution This caution symbol means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data. Timesaver This symbol means the described action saves time. Command Conventions Table 1 describes the command syntax used in this guide. Table 1 Command Syntax Conventions Convention boldface italic [ ] {x | x | x} ^ or Ctrl screen font boldface screen font Description Commands and keywords. Command input that is supplied by you. Optional keywords and default responses to system prompts appear within square brackets. A choice of keywords (represented by x) appears in braces separated by vertical bars. You must select one. Represents the key labeled Control. For example, when you read ^D or Ctrl-D, you should hold down the Control key while you press the D key. Examples of information displayed on the screen. Examples of information that you must enter. OL-5332-01 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 13