A Brief History Of Fiber-Optic Communications
Optical communication systems date back to the 1790s, to the optical semaphore telegraph invented by French inventor Claude Chappe...
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Optical-Cable Construction
The core is the highly refractive central region of an optical fiber through which light is transmitted...
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power protection
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Web Resources
There are many ways to promote your website and one of the
most efficient ways is to use search engines. Search
engines are the first stop for most people trying to find
information, services, and products online. Because of
this, it is essential that your website appears quickly in
search results.
The Internet contains numerous search engines, some of
which offer what is known as "paid inclusion." This means
that you pay the specific search engine an annual fee for
your web page to be included in their index.
Of course, every search engine already has an automated
program commonly called a "spider" that indexes all the web
pages it locates online, and it does this for free. So
whether you pay or not, your web page will eventually be
indexed by all Internet search engines, as long as the
spider can follow a link to your page. The major issue is,
then, how quickly your page is indexed.
A search engine that offers a paid URL inclusion uses an
extra spider that is programmed to index the particular
pages that have been paid for. The difference between the
spider that indexes pages for free and the spider that
indexes only pages for a fee is speed. If you have paid for
inclusion, the additional search engine spider will index
your page immediately.
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