May 2009
Intermediate to advanced
882 pages
22h 55m
English
Content preview from Cisco® Network Professional's: Advanced Internetworking Guide
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1.1. The Three-Layer Hierarchical Design Model
For years, the three-layer model has been used to design and evaluate networks with a good amount of success. The three-layer model, as shown in Figure 1.1, provided you with three design areas. The three layers are the access, distribution, and core layers. Using a layered approach allows a network designer to logically define the network in terms of functions and devices. The result is a network that can be easily managed and has deterministic failure built in.
Concept: Deterministic FailureAlthough no one wants a device or link to fail, every seasoned network administrator knows that failures occur. Deterministic failure allows you to implement secondary or standby devices to take over for ... |
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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.
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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.