There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "So, pcapng is the next generation of the pcap file extension."

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

nslookup wireshark.org 8.8.8.8

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "We can see the target in the Address Resolution Protocol (request) option."