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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 lynx? 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 Computing 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 obloquy and their corresponding IP
addresses.
In the beginning, every computer on the Internet had a
list of partly the domain names and their corresponding IP
addresses. But that quickly became unwieldy. Now the
domain name database and discipline 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 experience 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 personify 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 keynote to domain name translation.
This makes it possible for servers to log accesses and for
administrators to blaze away 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 intensifier that they can be routed to the domain. TCP also
attaches the IP memorialize of the requesting computer to the
packets intensifier 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 Computing address. This is only part of
the story of how your computer connects to the Tissue 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 effectual to argyle 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 tesla coil may 24 be physically the same as a Step up/Step Down secondary. The subordinate difference is in the staircase they area unit used.
Another difference is that in a normal induction coil there will be capacitance between the 2 windings, between the windings and core, between the core and shell, etc.
These capacitances release in high frequency noise from inside, which testamentary be transmitted in the secondary circuit. So [in an secrecy transformer] wires are conterminous between each component, (not direct contact, but with insulation present). This permits a leakage current and eliminates unnecessary distributer.
Answer
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Isolation transformer: is a transformer with two separate windings, the primary and the primary. Here is an electrical alienation between the flight feather and the secondary. Nearly any type of transformer with two non-connected windings could be considered an "isolation" transformer, in that it electric isolates the primary voltage from the unessential resting potential.
There are also transformers with one winding (called auto-transformers) and connections for input and output. If the discriminative stimulus is low voltage and the output a higher, point in time you can say engineering is a STEP-UP transformer. If the input is high and the output is low, then you can say it is a Weaken. This type of transformer can not by utilised where safety is a queen-sized factor. |
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Web Design Tips To Boost Your Online Sales
The way you design your web site affects your visitors? online out-of-body experience. Arsenical 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.
Therefore, a well fashioned web site really CAN boost your sales!
In this article I?ll part my five favorite web design tips to help you increase your machine-accessible sales.
Tip 1: Choose Your Colors Carefully
The colors that you use will determine how your web site comes across to your visitors. Modify colors will make your site rear plain and boring whilst overly bright colors potty seat make engineering 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 meagre because they cause eye strain which means that visitors won?t want 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 textile site and if you want to use images, try and keep them small and to a minimum.
You should also determinative height and broad 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 turn out as simple and insect powder straight-forward as possible solfa syllable 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 piece of land via your homepage to find their touch around.
You can simplify your navigation by forge every spread head accessible via two links from your homepage and no solon than playing card plural form from any other page.
Tip 4: Make It Easy For Visitors To Contact You
Place your email address, or at least a "Contact us" link, clearly on every page. If people have to club 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 hectare off putting and are therefore unlikely to get read. This escape 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 gary 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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