October 2016
Intermediate to advanced
384 pages
11h 30m
English
Content preview from IP Multicast, Volume 1: Cisco IP Multicast NetworkingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 1. Introduction to IP Multicast
There are three data communication methods in IP networks: unicast, broadcast, and multicast. To establish a baseline, it is important to understand the fundamental elements of unicast and broadcast before we explore the details of multicast communication methods.
Unicast communication at Layer 3 (the Network layer) of the Open Systems Interconnect (OSI) model is based on the IP address of the destination device. Routers learn about routes by static or dynamic methods and forward traffic by looking at the destination IP address. Layer 2 (the Data Link layer) uses another mechanism to establish communication between devices using media access control (MAC) addresses.
Take a look at Figure 1-1. The sender ...
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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.