I should have said "it depends".
The first question you should ask is: "How is the Internet bandwidth will be used?" Let's say the company has a very large clientele, and that your company has hosted a website, the provided application services for customers. Would in this case, you probably want to use the same ISP (probability that an animal 1) that your client uses. In most cases, will provide the fastest (in terms of Internet router hops) from PC to your customers for your businessMega-site with your Internet provider IP network - because your customers do not cross-package public peering points (NAPs). (I have only this offer is unlikely, for example, to illustrate a point)
Another scenario is more likely that your company has several remote sites, who wanted to connect via VPN. In an ideal world you want to install remote access to the Internet from ISP site. This is again so that the number of router hops between theRemote places and the seat of the site on the Internet, will be minimized through points of peering out, and latency is minimized. If the branches are distributed in the United States, you must think of a Tier 1 ISP service for all your remote controls. If the hands of others, remote sites at the regional level, a strong regional level 2 ISP can offer better access, lower prices and better peering with other regional providers.
Of course, Another important aspect is the flexibility of the Internet service provider "last mile" to provide the connectivity options. Can the ISP to grow with you? You can start with a single T1 Internet connection, which grows to two or three T1s in a Multilink PPP. In which the ISP can take from there? It is an optical fiber networks in your building (in support of a DS3 or OC3 or Packet over SONET) an option? Is redundant connections with different fibers forwarded an option? How far is your company fromPoint> provider of Presence (POP)? If the provider of access to the fiber in your area, or would be installed?
I hope I have started to make a case that the bandwidth and price are not the only things to consider when choosing an ISP.
Note that if you MPLS connectivity to the sites of other companies to use to connect to the Internet, QoS is not really come into play. An SLA on the other hand, is always a good thing to have - especially if you useMission-critical applications for your company (or client) of your company. And probably not a bad idea to get the financial health of the provider as well.
All that said ... Here's a simple reason for the selection of a Tier-1.
Tthe simple answer is that the Tier 1 providers Pier privately with each other and how to expand their connections needed to support its customers and to transfer Internet traffic that are mutually reinforcing. Tier 2 and still earn belowBandwidth of the Tier 1 providers to traffic to and from the main providers of Internet backbone, the Tier-1 represent the movement.
In essence, hops, and have less potential bottlenecks, the better the solution provider is your world and the largest of the spine and the connections under all Internet service providers, the better the communication and performance expected power.
Now, of course .... this is what I do need your business 'and' for?
Tier 2 suppliers cangood service, but if you want to create a multi-WAN site and all locations are given in the same Tier 1 service area, its hard to see how it is able to obtain a more reliable would be a network provided by an animal -1. Any failure would have been maintained by a supplier ... It's really great the fall in level 2 vendor: packages will be riding someone else's glass or copper for the last mile of the journey. What happens, usually where 90% + of problems with an MPLS configurationJump out ... between the environment and CO CPE at the sites.
The bottom line .... Much depends on what type of service you want and where.
To help you walk through a decision on a solution of bandwidth ... I suggest taking advantage of the free assistance available from DS3-Bandwidth.com.
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