computer science

XLINK (Internet service provider)

XLINK (Internet service provider) 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 XLINK (Internet service provider) rather than just read about it. In short: XLINK (originally the Externe Lokale Informatik-Netz Karlsruhe), was the external connection of the computer science network of the universities in Karlsruhe, Germany), subsequently becoming part of the first commercial Internet service provider (ISP) in Germany. History It was created in 1984, when it offered one of the first UUCP connections from Germany to the United States (via UUNET), and from November 1989 it…

Key takeaways

XLINK (Internet service provider) 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 XLINK (Internet service provider) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of XLINK (Internet service provider) from memory before moving on to harder problems.

Reference excerpt

XLINK (originally the Externe Lokale Informatik-Netz Karlsruhe), was the external connection of the computer science network of the universities in Karlsruhe, Germany), subsequently becoming part of the first commercial Internet service provider (ISP) in Germany.

History It was created in 1984, when it offered one of the first UUCP connections from Germany to the United States (via UUNET), and from November 1989 it also offered Internet connectivity mainly to universities in the south of Germany. XLINK was one of the founding members of RIPE and of DENIC; its autonomous system number (autnum) was AS517. It was transformed into (part of) a company in 1993, and as such, competed with the UniDO ISP (incorporated as EUnet Germany) for the title of first commercial ISP in Germany. It was bought by Qwest in 1999 and contributed to and renamed to KPNQwest Germany in May 2000, which went bankrupt in the Internet bubble crash of 2002. Remnants exist in KPN Eurorings.

References

External links History of XLINK (in German)

Worked examples

Example 1 — a first encounter with XLINK (Internet service provider)

Start with the simplest possible case. Write down what XLINK (Internet service provider) 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 XLINK (Internet service provider) 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 XLINK (Internet service provider) 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 XLINK (Internet service provider)

In research: XLINK (Internet service provider) 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 XLINK (Internet service provider) 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: XLINK (Internet service provider) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer network stubs, Internet in Germany, Internet service providers, so understanding it makes those chapters shorter.
In everyday life: Look for XLINK (Internet service provider) 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 XLINK (Internet service provider) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what XLINK (Internet service provider) 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 XLINK (Internet service provider) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is XLINK (Internet service provider) in simple terms?

Why does XLINK (Internet service provider) 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 XLINK (Internet service provider)?

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 XLINK (Internet service provider).