December 2004
Intermediate to advanced
448 pages
16h 40m
English
Content preview from Firewalls
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between the different operators. Another protocol is Media Gateway
Control Protocol (MGCP), or the related H.248/Media Gateway
Controller (MEGACO), which sometimes is used to control IP phones
on a low level in order for operators to connect these to the old tele-
phone network, the Public Switched Telephone Network (PSTN).
It should be noted that IP telephony (where ordinary telephony is
emulated over IP) is only a small part of P2P communication for
which SIP was created. Real-time P2P communication is now the
next big step in Internet usage, following e-mail and web surfing.
2
15.4 Routers, firewalls, and NATs
When connecting a PC to the Internet, you ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.