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Friday, June 6, 2008

How to Connect Multiple Computers to One Broadband Internet Connection

Broadband, or high-speed, Internet connection is what many users currently use in their home. Along with high-speed Internet, many users may also use a router to allow multiple computers to connect to the Internet. This post will describe how a router is used to connect multiple computers. To make it easier to understand, I will use where you live as a comparison to how your computer is connected to the Internet.

What is an IP Address?

IP addresses are a series of numbers in the form: nnn.nnn.nnn.nnn, where nnn is a one to three digit number. An IP address is unique to an individual computer on a network, similar to how your home has a unique address. For an Internet connection, an IP address is supplied by your Internet Service Provider (ISP). In some cases, your ISP may provide you with more than one IP address, which allows you to connect multiple computers. As you will see later, however, you can still connect multiple computers with a single IP address.

Connecting a Single Computer

Connecting a single computer to your high-speed Internet is very simple to do. Simply connect a network cable into your modem, and then into the network card in your computer. Your computer will then be assigned an IP address from your ISP. For example, if your ISP assigned you the IP address of 24.24.50.17, then your computer will have that IP address.

When you make a request to a server, such as for a Web page, the Web server knows which IP address made the request. The information is then sent through the Internet and back to your computer. This is similar to when someone sends you mail to your home. The address on the mail allows it to be delivered to your home and not somewhere else.

Connecting Multiple Computers

How can multiple computers connect if only one address is assigned? When you make a request for a Web page, how does it know which computer requested that page? Let's take our home analogy one step further. Let's say instead of living in a house, you live in an apartment. When someone sends you mail, they not only include your address but also an apartment number. This number is internal to your apartment building and every apartment has its own unique number. Similarly, multiple computers can connect to the Internet if they each had there own unique local IP address. This can be handled by a router.

A router is a piece of hardware that connects directly to the modem. Each computer is then connected to the router, instead of the modem. Now instead of your computer having the IP address supplied by your ISP, your router now is assigned that IP address. This is similar to your router acting as the apartment building.

The beauty of a router is that it can assign its own local IP addresses. When you connect a computer to the router it now receives one of the IP addresses assigned by your router, similar to how each apartment has it's own number. Now when you make a request for a Web page, the request is sent using the same ISP address, but this time it is assigned to the router. When the Web page is returned, the router receives the request, and sends it locally to the computer that requested the page.

The router also has its own local address that is similar to the local IP addresses of the computers. So now the router has two addresses assigned to it: an external one provided by your ISP, and a local one provided by it. This allows the router to connect to both the Internet and the local network.

Note: The 192.168.xxx.xxx address are special IP addresses reserved for Local Area Networks (LANs).

Managing a FTP or Web Server on Your Network

Let's take a look at this scenario. You have a router connecting multiple computers to the Internet. But now you want to create a FTP or Web server. No problem. You setup the necessary software on a computer on your network, told someone outside your network the local IP address of your FTP server and they try to connect. They then discover that they can't connect. Why? Its similar to someone mailing something to you by just specifying your apartment number and no address.

The IP address assigned to your computer is local to your network. You can connect to that computer from within your network, but not from the Internet. You will need to use your ISP-assigned IP address (the one assigned to your router) to have someone from the Internet connect to your FTP server. The problem is that your router is assigned that IP and not your computer, and since an IP address must be unique, how can two computers have the same IP? The answer: they can't, but they don't need to.

Routers have the ability to forward information on a port to a specific computer. A port is a numbered channel that data can be sent through on a network. You cannot physically see it as it is a virtual channel used extensively in networking for sending/receiving data. For FTP servers the default port is 21; however another port can be used.

Open your router setup and look for the port forwarding option. Specify the internal IP address of your FTP server and the port number and then save that information. Now when a user tries to access your FTP site, they must use the ISP IP address that is assigned to your router. The router will then notice that the data is being sent on port 21 and then forward it automatically to your FTP server. A Web server can be setup the same way, but its default port is usually 80.

Note: By default a router will dynamically assign IP addresses to the computers connected to it. This means that the first computer to connect to the router will get the first available IP address, and the next will get the second, and so on. If you manage an FTP server, it may be easier to assign a static IP address to the computers to ensure that the FTP server always has the same IP address.

This article described how to connect one or more computers to one Internet connection. It is important to remember the following:

If you have one computer connected directly to the modem, then that computer will be assigned the IP address from your ISP.
When using a router, the the router will be assigned the IP address from your ISP. Any computers connected to the router will be assigned a local address by the router.
A router will have the ISP IP address and a local IP address. This allows it to connect to both the Internet and your network.
When setting up a computer as a FTP, Web, or other server to communicate over the Internet, it is important to use the router's IP address to access your server. You will then need to forward the necessary port to your server.

For more information, please read the Technically Easy blog.

Paul Salmon has been involved with computers for 20 years and currently works as a technical systems analyst. He has been involved in many aspects of computers including hardware, software development and quality assurance. He currently maintains Technically Easy, a blog that provides information about various technologies in use today.

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If Not WiMax, Than WiWhat? Wisps Want To Know

The WiMax craze is not over, but the train has certainly slowed a bit. The difference between what was expected and when it finally arrives has tempered some enthusiasm amongst Wisp afficiandos. Just what will we see... and when?

Some of the advertising for WiMax promised we'd all be delivering internet, tv, phone, running water, nicely done toast, etc to 300 customers per AP... all while driving 250mph in their Porsche's. So far it's not there yet and some wonder if it really even makes sense for the average rural Wisp. The current lineup of 802.11 gear has it's issues when used outdoors like Wisp's do, but the low cost and good compatibility between suppliers has allowed many Wisps to turn a profit (finally). Most aren't excited at all about spending lots more for equipment that solves problems that they really don't have. Not everyone is rural, but with low population densities it really doesn't pay to do much more than internet. Maybe some VoIP, but the investment for other services is hard to make work with too few possible customers.

So, what do Wisps really want? Personally, I'd think they'd like to not make their investment in equipment worth zero really quick, so it would be great if whatever comes next is compatible with some of the current hardware (8186, etc). Also, the idea of having more customers per application is great, but everyone has their own poling design. Also, better and more stable links with better NLOS capability are things Wisps can all use. Part of what makes the Wisp thing work is low cost equipment... and low cost equipment happens when there is decent competition and a standard to design to.

I doubt it will be backwards compatible. For years manufactures of Wimax were going back and forth arguing over "who's" standard to use. To this date everyone is still scratching their head to see who's they plan to use!

Wisps build out networks on todays equipment. That's just reality. They are not going to wait around for the magic bullet that will never appear... and if it does will not be anywhere near what they claim.

Generally, as a Wisp you have to look at what the needs are in your specific area and go from there. For example 802.11 b /g "stuff" will only take you so far. If you ask, I am sure every Wisp has started with it in one form or another... and expanded from there due to the needs of the environment and or client.

In all honesty, what you buy today will still be good a couple years down the road. And if you lay out your business plan correctly it will all be paid for... and you will be turning a profit by the time any new stuff comes out that you may need based on your client's needs. Then again... maybe you will be happy for the next 5-6 years with what you have now.

The moral of the story? Change is not always bad... but beware what you ask for. In the meantime keep truckin' with what you have. That may be all there is for awhile.

Michael is the owner of FreedomFire Communications....including DS3-Bandwidth.com and Business-VoIP-Solution.com. Michael also authors Broadband Nation where you're always welcome to drop in and catch up on the latest BroadBand news, tips, insights, and ramblings for the masses.

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If Not WiMax, Than WiWhat? Wisps Want To Know

The moral of the story? Change is not always bad... but beware what you ask for. In the meantime keep truckin' with what you have. That may be all there is for awhile.

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Thursday, June 5, 2008

Weather Balloons Boost Broadband

Weather balloons floating in the Earth's atmosphere at the moment could possibly be used to provide mobile phone and broadband services to Rural Britain.

An American company, Space Data, has had success with an innovative idea, whereby it attaches small phone masts to weather balloons. This then provides isolated areas with wireless internet access.

The Arizona based group has provided military and commercial clients for four years and are now prepared to link their idea with telecoms and broadband companies in order to bring their idea to the masses.

The working behind the novel wireless provider is that a very small transceiver is attached to the weather balloon that then rises to a total altitude of 100,000ft. According to the company, one balloon can produce a signal that is as strong as 80 mobile phone towers and could therefore enable a lot more people to have broadband internet connections. The company also believe that for the entire United States, 70 balloons would be all that was needed to provide everyone with wireless internet.

The balloons are released by local farmers and other land workers who are paid to deploy them. The balloons are released in areas that have not had wireless internet connections due to the companies who provide them considering it uneconomic, as there are few people in the area.

Around 20% of the United States is out of range for any wireless connection, and it has long been an issue in Britain that many rural areas are unable to receive a wireless signal or are expected to pay over the odds in order to get one, therefore, meaning that they have no option for cheap broadband. Consequently, if this idea was to take off, there would be a large number of people who would benefit.

Space Data are very productive at the moment and release around 10 balloons a day from places in South America that do not receive a wireless signal and is interested in providing its service for the UK. This service is one of many that have seen the potential and the financial benefits that the rural wireless connection market could offer.

Space Data have said that companies that are not offering rural areas a wireless connection are missing out on hundreds of millions of dollars a year. The group have said that they have tapped into a business that is potentially worth $10 billion market.

It would appear that there is a solution to the wireless connection problem, however, not a very long-term one, as the balloons last 24 hours before they burst. The expensive equipment then has to be retrieved; this is done using GPS devices. Environmental groups have said that they fear that the burst balloons could prove a threat to any animals that may eat the latex.

The limited time that the balloons last could prove expensive and difficult, however, if the company could arrive at an idea that would enable the balloons to last longer, then the skies the limit.

Space Data has decided to link their weather balloon idea with telecoms and broadband companies.

The weather balloons could mean that more people are able to receive wireless broadband connections.

Some rural areas in Britain are unable to get a cheap broadband connection as they have to pay over the odds just to receive a basic connection.

Wednesday, June 4, 2008

Weather Balloons Boost Broadband

Weather balloons floating in the Earth's atmosphere at the moment could possibly be used to provide mobile phone and broadband services to Rural Britain.

An American company, Space Data, has had success with an innovative idea, whereby it attaches small phone masts to weather balloons. This then provides isolated areas with wireless internet access.

The limited time that the balloons last could prove expensive and difficult, however, if the company could arrive at an idea that would enable the balloons to last longer, then the skies the limit.

Space Data has decided to link their weather balloon idea with telecoms and broadband companies.

The weather balloons could mean that more people are able to receive wireless broadband connections.

Some rural areas in Britain are unable to get a cheap broadband connection as they have to pay over the odds just to receive a basic connection.

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Tuesday, June 3, 2008

VoIP Internet Broadband Phone Service - A Great Way To Stay Connected

The importance of VoIP Internet broadband phone service cannot be overemphasized. As many of us are aware, in Internet broadband phone service, "broadband" connections are used to facilitate the transfer of voice signals over IP networks.

Voice over IP, or IP telephony as it is commonly called, is quite fascinating. This technology changes voice signals to digital data packets before transferring them over IP networks to different destinations. At the receiver's end, the digital data packets get changed into voice signals. For ordinary users and subscribers to VoIP phone services, there is nothing amiss; calling via VoIP would seem quite like making calls using the traditional phone networks.

Setting up of a VoIP internet phone service does not require much. The broadband providers do their bit in facilitating the entire process. In many instances, users of broadband phone services are provided with IP phones that can be directly connected to a router or a modem. Potential users can also use the analogue telephone adapter (ATA); this equipment is connected to a router or a modem. In this way, even normal phones can be used to make low cost international calls. A lot of options are available in the market that makes the entire experience an enjoyable one. And the joy that an user would feel while making low costs calls to almost anywhere in the world using this service has to be experienced to be believed.

The merits of subscribing to the services of broadband providers are many. An user is able to achieve significant efficiencies in call rates, for instance. Moreover, that extra bit is always a part of many of the broadband phone services and plans. This could include features such as call waiting, voice mail, caller ID. No extra money is charged from the customer for these specialized services.

However, like with all good things, there are certain hiccups while using broadband internet services. By very definition, these services are dependent on a 'high speed' broadband internet connection. This means that phone services are adversely affected, when there is some problem with internet connectivity. Moreover, there are certain reliability and security issues that need to be taken care of and efforts are on at several levels to address all these problems.

In the mean time, users can go ahead and use the services to 'connect' with people who matter in a cost efficient manner. The telephone bills are significantly less, when the costs of making phone calls using VoIP are compared to the costs of doing the same through the traditional phone systems. Sometimes, the reduction is as much as 60 per cent.

However, to get all the benefits, selection of broadband providers become very important. In this context, it can be said that several plans and programs are available from various providers of repute. One could get to know more about these deals; an that too from the comfort of one's homes or workstations; by browsing online through the e-portals on which many of these deals are being showcased.

However, the terms and conditions should be properly understood before a person subscribes to any such program. Special care must be taken to understand the conditions that could sometimes be given in fine print. Moreover, the merits and the drawbacks of the different plans have to be assessed viz-a-viz the specific needs and requirements of different categories of users.

And the great news is that switching from a traditional service provider to VoIP broadband phone service is not at all difficult. Some broadband providers offer free trial of their services before a user makes the final purchase decision. This way he or she gets a feel of making calls through the Internet - without committing to it all the way.

To know more about these internet phone service, visit: VoIP Phone Service offered by one of the leading VoIP Service Providers.

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Monday, June 2, 2008

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