October 2002
Intermediate to advanced
344 pages
10h 17m
English
Content preview from The ABCs of TCP/IP, 2nd Edition
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140
The ABCs of TCP/IP
datagrams to the destination specified in the Ping command line. The reason
the request timed out has nothing to do with the TTL value. Instead, the
White House uses a firewall to block pings because it is one of a number of
weapons unsophisticated hackers like to use. Chapter 8 and 9 provide greater
detail concerning how one can block pings.
The lower portion of Exhibit 12 illustrates a second ping, a commercial site
Web server whose address is similar, but not the same as “the White House.”
This commercial site Web address is www.whitehouse.com. Note that Ping
automatically resolves the entered host name into an IP address. Also ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.