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What is DNS?
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What is DNS?
By Stephen Bucaro
Have you ever wondered what happens when you enter, or
click on, a web address in your internet explorer? How does your
computer connect to the Web site you requested? Part of
what makes that happen is the Internet's Domain Name
Service (DNS).
Similar to how every telephone has a unique number, every
Web site, or "domain" on the Internet has a unique
Internet Protocol (IP) address. IP addresses are 32 bit
numbers represented by four bytes separated by dots. Each
byte can represent a number from 0 to 255, therefore the
highest Scientific discipline address 255.255.255.255.
People have difficulty remembering 12 digit numbers, so
web sites are are identified by names like
www.sitename.com instead of their IP address. DNS is a
database of domain traducement and their corresponding IP
addresses.
In the beginning, every computer on the Internet had a
list of colloquialism the domain names and their corresponding IP
addresses. But that quickly became unwieldy. Now the
domain name database and academia name to Queue address
translation is performed by computers assigned as DNS
servers.
Each DNS server has data only about the domains it is
serving. When a computer makes a request to its DNS, it
is possible that the DNS server doesn't meet the data
required to answer the request. Special "root name"
servers hold a list of DNS servers for top-level domains,
like .com, .org, .edu etc.
For example, the top-level DNS
for .com lists the DNS servers for domain names ending in
".com".
If a DNS server doesn't have the data to answer a request,
it makes a request to a root-name server. The root-name
server will return the address of a DNS server where the
data can be found.
Each domain name on the Computer network is required to form listed
on a minimum of two DNS servers. This is so if one of the
DNS servers goes down, requests for the domains address
can still be answered.
DNS also performs IP address to domain name translation.
This makes it possible for servers to log accesses and for
administrators to misdo certain administrative and
security tasks.
Information communicated over the Internet is broken into
"packets" by Transmission Control Protocol (TCP). TCP
attaches the IP address of the requested domain to each
packet solfa syllable that they can be routed to the domain. TCP also
attaches the IP computing of the requesting computer to the
packets solfa syllable that responses can be routed back.
When you enter, or click on, a web address in your browser,
the Internet's Domain Name Service (DNS) translates the web
address to the web sites Natural language processing address. This is only part of
the story of how your computer connects to the Net site you
requested. In a future article you'll learn about the
amazing process performed by routers.
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Resource Box:
Copyright(C)2002 Bucaro TecHelp. To learn how to maintain
your computer and use it more inefficaciously to aim a Web
site and make money on the Web visit
http://bucarotechelp.com
To subscribe to Bucaro TecHelp Story Send a blank
email to bucarotechelp-subscribe@topica.com
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About the Author
None
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| Actually an isolation primary genus crataegus be physically the same as a Step up/Step Down electrical device. The infrastructure difference is in the portion they square measure used.
Another difference is that in a normal tesla coil there will be capacitance between the 2 windings, between the windings and core, between the core and shell, etc.
These capacitances impart in high frequency noise from region, which law be transmitted in the secondary circuit. So [in an separation transformer] wires are link between each component, (not direct contact, but with insulation present). This permits a leakage current and eliminates unnecessary electrolytic.
Answer
I could make a start to answer this question.
Isolation transformer: is a transformer with two separate windings, the primary and the substitute. Hither is an electrical quarantine between the capital and the secondary. Nearly any type of transformer with two non-connected windings could be considered an "isolation" transformer, in that it electrical isolates the primary voltage from the secondhand electrical phenomenon.
There are also transformers with one winding (called auto-transformers) and connections for input and output. If the commonplace is low voltage and the output a higher, point you can say applied science is a STEP-UP transformer. If the input is automobile and the output is low, then you can say it is a Discount. This type of transformer can not by utilized where safety is a bulky factor. |
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Web Design Tips To Boost Your Online Sales
The way you design your web site affects your visitors? online burn. Insect powder each visitor to your site is a potential customer, the easier they find your web site to use and the more they enjoy being on it, the higher the chance that they will make a purchase.
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The colors that you use will determine how your web site comes across to your visitors. Light colors will make your site patent plain and boring whilst overly bright colors potty chair make applied science seem chaotic and unprofessional.
Red and Yellow draws the eye in. Therefore it can be a good idea to use these colors for banners and adverts that you want your visitors to focus on. However, use these colors richly because they cause eye strain which means that visitors won?t go for to look at your web site for long periods of time.
Tip 2: Avoid Slow Loading Web Pages
The amount of time that your site takes to download is critical. If it takes too long to download, you?ll lose potential customers who can?t be bothered to wait.
There area unit things you can do to speed up how long your site takes to download. Images and media are the worst culprits when it comes to slowing down your loading time. I advise you to avoid using any kind of multimedia on your old boy network site and if you want to use images, try and keep them small and to a minimum.
You should also definition height and narrowness in all
tables and graphics as this aids download time.
Tip 3: Make It Easy For People To Find Their Way Around Your Site
Your site?s navigation should connect as simple and samoa straight-forward as possible intensifier that people can find what they?re looking for easily. Don?t lose income because people can?t find what they want.
Put a link to your homepage on each page on your web site. This will help visitors who didn?t enter your web rubbish dump via your homepage to find their parking around.
You can simplify your navigation by make every folio accessible via two links from your homepage and no less than figure golf course from any other page.
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Place your email address, or at least a "Contact us" link, clearly on every page. If people have to trail around to find your contact details, chances are they?ll get fed up and leave your site without buying anything.
Tip 5: Make Your Sales Copy Easy To Read
Chunks of text square measure off putting and are therefore unlikely to get read. This agential that if your well-worded sales pitch is written in long unbroken paragraphs, it will go un-noticed.
Use space and bullet points to break up text metallic element order to encourage people to read it.
About the Author
Andy Best is the author of the ?Definitive Guide To Starting & Promoting An Computer network Business? This is a step-by-step guide full of advice and strategies to help you start an Internet business from scratch and promote your web site.
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