January 2002
Beginner
238 pages
6h 20m
English
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Choosing an ISP
ISPs may be evaluated against several criteria that may be broadly classified under the headings Services, Architecture, Addressing/Routing, Operations Support, and Pricing. Some criteria will, of course, be more important to your organization than others.
Services
First and foremost is whether the ISP provides the services you need at your location. If you need T-3 access in Lisbon, Portugal, can the ISP meet your requirement?
Network Architecture
Is your application so critical that even a short outage would be intolerable? If so, you should look closely at the ISP’s network architecture. Are there redundant routers at the points of presence (POPs)? Are there redundant links between POPs? What is the speed of the links between POPs?
What other ISPs and providers are peers of the ISP? If you are a wine merchant in Portugal and the majority of your distributors and customers are on ISP-Japan, you should find out how far your ISP is from ISP-Japan. Do they have direct peering? If not, how many intermediary networks are involved?
Addressing/Routing
Can the ISP carry the prefixes you want advertised? This may be an issue if you borrow a prefix from ISP-P but want to advertise the same prefix to ISP-Q.
Will the ISP support the routing policies you desire?
Operations
How is the ISP managed? What processes and resources does the ISP have in place for managing its resources? How does the ISP monitor traffic on its backbone? At what level of utilization is the network bandwidth ...
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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.