Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "Add the string tcp.window_size to view the TCP window size".

A block of code is set as follows:

[not] primitive [and|or [not] primitive ...]
proto [Offset in bytes from the start of the header : Number of bytes to check]

Any command-line input or output is written as follows:

Reply from 173.194.35.148: bytes=32 time=98ms TTL=51
Request timed out.
Reply from 173.194.35.148: bytes=32 time=124ms TTL=51
Request timed out.
Reply from 173.194.35.148: bytes=32 time=134ms TTL=51
Request timed out.
Reply from 173.194.35.148: bytes=32 time=582ms TTL=51
Request timed out.

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "clicking the Next button moves you to the next screen".

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.