computer science

Seattle Internet Exchange

Seattle Internet Exchange is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Seattle Internet Exchange rather than just read about it. In short: The Seattle Internet Exchange (SIX) is an Internet exchange point in Seattle, USA. Its switch fabric is centered at the Westin Building and extended to KOMO Plaza, Sabey Intergate, and other locations.

Key takeaways

Seattle Internet Exchange belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Seattle Internet Exchange to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Seattle Internet Exchange from memory before moving on to harder problems.

Reference excerpt

The Seattle Internet Exchange (SIX) is an Internet exchange point in Seattle, USA. Its switch fabric is centered at the Westin Building and extended to KOMO Plaza, Sabey Intergate, and other locations. The SIX is one of the most successful examples of neutral and independent peering points, created as a free exchange point originally sponsored only by donations. The SIX is the most frequently cited model upon which other neutral Internet exchanges are based, and its financial and governance models are often cited as inspiration for other exchanges. It continues to run without any recurring charges to the participants and current major funding comes from one-time 10, 100, and 400 Gbit/s port fees, as well as from voluntary contributions from stakeholders. The SIX is a 501(c)(6) tax-exempt non-profit corporation. As of April 21, 2026, there are 368 networks (436 routers) connected to the SIX advertising at least 221,000 (147,000 IPv4, 74,000 IPv6) unique Border Gateway Protocol (BGP) routes. There are two route servers running Bird Internet routing daemon (BIRD).

Technology The core of the SIX consists of Arista Networks switches, with a 7808R3, 7512R, and 7508R at the Westin Building, a 7504R3 at KOMO Plaza, and a 7504R at Sabey Intergate. Participants may connect to the SIX core using a 1 Gbit/s, 10 Gbit/s, 40 Gbit/s, 100 Gbit/s, or 400 Gbit/s Ethernet connection (fiber) or to one of several extensions. Extensions are sponsored by colocation facilities or transport providers. Both IPv4 and IPv6 peering is available and encouraged at the SIX, with availability dependent on the peer. Jumbo frame peering at 9000-byte maximum transmission unit (MTU) is available.

Extensions The following is a list of SIX extensions:

Archeo Futurus: Connects participants at H5 Data Centers Seattle. Astound Broadband: Regional network. BSO/IX Reach: Worldwide WAN. Equinix: PAIX SEA, which is a neutral Internet exchange point operated by Equinix in Seattle, Washington. Minnesota VoIP: Minnesota area. NOCIX: North Kansas City area. Reliable Internet (Arrow Calgary): Calgary area. Wholesail Networks: Regional network. Wowrack: Wowrack datacenter in Tukwila, Washington.

See also List of Internet exchange points

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with Seattle Internet Exchange

Start with the simplest possible case. Write down what Seattle Internet Exchange claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Seattle Internet Exchange before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Seattle Internet Exchange ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Seattle Internet Exchange

In research: Seattle Internet Exchange appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Seattle Internet Exchange in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Seattle Internet Exchange is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1997 establishments in Washington (state), Internet exchange points in the United States, Network access, so understanding it makes those chapters shorter.
In everyday life: Look for Seattle Internet Exchange outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Seattle Internet Exchange in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Seattle Internet Exchange means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Seattle Internet Exchange out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Seattle Internet Exchange in simple terms?

Why does Seattle Internet Exchange matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Seattle Internet Exchange?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Seattle Internet Exchange.