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, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "The IP address of the target host was 10.1.1.125."

A block of code is set as follows:

(tcp.flags&02 && tcp.seq==0) ||  (tcp.flags&12 && tcp.seq==0) || (tcp.flags.ack && tcp.seq==1 && !tcp.nxtseq > 0 && !tcp.ack >1)  || tcp.flags.fin == 1 || tcp.flags.reset ==1

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

dumpcap -i 2 -f "host 192.168.1.115" -w capture.pcapng

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: "This field is roughly equivalent to the Time To Live field in IPv4; it is decremented by one by each device that forwards the IPv6 packet."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.