Understanding TCP/IP

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.

There are three styles for code. Code words in text are shown as follows: "You can set it explicitly for the ping and traceroute commands."

A block of code will be set as follows:

C: HEAD / HTTP/1.1;;
C: Host: www.iana.org
C:
S: HTTP/1.1 200 OK
S: Date: Tue, 20 Dec 2005 21:17:06 GMT
S: Server: Apache/1.3.27 (Unix) (Red-Hat/Linux)
S: Last-Modified: Thu, 04 Nov 2004 19:34:30 GMT
S: ETag: "1acad9-153a-418a8446"
S: Accept-Ranges: bytes
S: Content-Length: 5434
S: Connection: close
S: Content-Type: text/html

When we wish to draw your attention to a particular ...