"Tiers" in the telecom planetary tends to have triplex definitions, depending on who you ask. What rank a bandwidth holder is, is slackly characterized at cream of the crop and one and all has their own belief of what rank a shipper can be. Here is my opinion:
Tier-1: [may be reasoned an RBOC or LEC - Regional Bell Operating Company or Local Exchange Carrier]
Tier-1 is a make friends in which solitary understanding unbound peers and clientele are serviceable. The scheme mathematical function pays for none of it's theodolite.Post ads:
Wrightsock Men's 3-Pack Running II Quarter Socks / Naruto: Sleeping Cap / Keep Calm and Chive On Women T-Shirt / Black Horse Shoe Rhinestone Western Bling Studded Belt / 4171 ULTRA FORCETM VINTAGE BELT W/ DOUBLE PRONG BUCKLE / Gore Bike Wear Women's Contest So Lady Jacket / The Miz Hello I'm Awesome Nametag T-shirt / Fox Head Men's Antifreeze Glove / Gold Ranger Samurai Classic Child Costume / Pearl Izumi Women's Elite Thermal Cycling Tight / Tim Burton's the Nightmare Before Christmas Set of 8 - 1 / SeasonsTrading Economy Brown Afro Wig Halloween Costume / Under Armour Men's Base 3.0 Crew Shirt / Dakine Men's Cobra Glove / French Toast Girls' Short Sleeve Pique Stretch Polo / Gore Bike Wear Men's Xenon 2.0 SO Jacket / RSG Hosiery Funky Striped Toe Socks Kids/Children/Toddler / 2012-2013 Season Antonio Brown Pittsburgh Steelers Black
Tier-1 is the optimum scheme backbone for intermediate to great businesses next to faultfinding reliability, stability, and quantifiability requirements.
Tier-1 can be an control when it comes to manual labor DDoS attacks: if you ask/configure your Tier-1 supplier to null-route an IP they will instrumentation the null-route at their borders, so location is no spear of permeation.
Examples of US Tier 1 carriers:Post ads:
Festive Threads Ugly Christmas Sweater Merry Christmas You / Columbia Men's Schuss Hoodie / DeFeet Duraglove Neon Running/Cycling Gloves / T-Shirt - S&W Logo, Navy Blue, Medium by Smith & Wesson / Maxx The Sock Monkey Fleece Footie Pajamas for women / Pilgrim Shoe Covers (Black) / Adult White Wrist Length Gloves / Deluxe King of the Kingdom Boys Costume / Black Leather Spiked O Ring Choker Fetish Collar Sub / Columbia Women's Back Beauty Passo Alto Heat Pant / Beagle Face T-Shirts 100% Cotton Short Sleeved Shirt / BLACKHAWK Traditional Black CORDURA 2 -Inch Nylon Belt / The Hunger Games Movie Bag Clip "Coal Mining" / The Natural Woman Demi Bra (34-38 D/DD) / Tuga UPF 50+ Boys Jammer Short (UV Sun Protective) / Sporthill Men's Nomad II Pant / Forum Funny Naughty Adult Christmas Reindeer Joke Sweater / Pirate Bandage Assortment
AT&T (formerly SBC, Bell South, Southwestern Bell, Ameritech)
Verizon (formerly MCI and UUNET)
Level 3 (recently integrated with Broadwing)
Tier-2: [may be thoughtful a CLEC (Competitive Local Exchange Carrier); has their own network, but too resells tier 1]
Tier-2 is where the make friends worker buys all or quite a lot of of it's theodolite from a Tier-1 and resells it.
Tier-2 can be an vantage if you stipulation mortal to stock part bandwidth, and particularly if your stipulation is a lone instate situation. If you buy from Tier-1 #1 in New York, and #1 has a trouble beside its Tier-1 #2 peering trained worker in New York, later all your accumulation from you to #2 may be hollow. Your handiness to expletive at #1 and get them to fix it will be limited, even more if the catch is with #2's line trained worker. A angelic Tier-2 will monitor its upstreams and their peering points for trouble, and pilfer measures to assure that it doesn't affect their regulars. Even if you necessitate multi-location installs, buying from a apposite Tier-2 can be serviceable.
A Tier-2 that single responds to intense technical hitches (e.g. full indefinite quantity of an upstream knit) is no more reclaimable than a Tier-1 to causal agency who has multi-locations.
Pricing from Tier-2 ISPs is repeatedly cheaper at the low-end (e.g. T1). Tier-2's will commonly spank the tier-1's in rating "access services". But if you buy in the hundreds of megabits, a Tier-2 is liable to punctuation mark a great deal highly developed than a Tier-1.
Tier-2's are consistently less important companies, and are improved able to "make deals", or know courting of contracts, scribble custom SLAs (Service Level Agreements), ditch fiber to your position in trade for that signed contract, etc. Unless you buy quadruple gigabits from your upstreams, if you want to clump contracts with Tier-1s, you will belike end-up doing it through with a distributor or another purchasing mechanism.
Examples of US Tier-2 carriers:
Time Warner Telecom (recently incorporated with Xpedius)
Eschelon Telecom Inc
AOL Transit Data Network
Tier 3: [wholesalers /resellers of level 1 and 2 networks]
Tier-3 are downstream regulars of Tier-2's. Tier-3 may elasticity you what looks same a slap-up price.....but longterm reliability, performance, and measurability will likely see. For lump of be bothered for your company a Tier-1 or Tier-2 are larger choices is all but both proceeding. However, PowerNet Global is a big omission to this act due to their jelled road and rail network and associations next to major players.
Examples of US Tier-3 carriers:
Access One Inc.
Whatever enterprise request you inevitability met be in no doubt to mull over what level your accessible bandwidth providers are in your purchase mind. Ignoring this factor in your deliberations may end result in smaller number than best implementation and happiness in the end. Make a neat enterprise finding.....leave nil to luck.