How to Connect Multiple Computers to One Broadband Internet Connection
Broadband, or excessive-velocity, Internet connection is what many users currently use in their home. Along with the excessive-velocity Internet, many customers might also use a router to permit more than one computers to hook up with the Internet. This post will describe how a router is used to attach more than one computers. To make it easier to apprehend, I will use wherein you stay as a comparison to how your computer is connected to the Internet.
What is an IP Address?
IP addresses are a chain of numbers in the form: nun.Nnn.Nnn.Nnn, wherein nnn is a one to 3 digit quantity. An IP deal with is precise to an personal computer on a network, just like how your private home has a completely unique deal with. For an Internet connection, an IP copes with is supplied by using your Internet Service Provider (ISP). In some cases, your ISP may additionally offer you more than one IP address, which allows you to attach multiple computer systems. As you may see later, but, you can nonetheless connect a couple of computer systems with a single IP address.
Connecting a Single Computer
Connecting a single computer on your high-velocity Internet is very simple to do. Simply connect a network cable into your modem, and then into the community card on your computer. Your pc will then be assigned an IP deal with out of your ISP. For example, in case your ISP assigned you the IP deal with of 220.127.116.11, then your laptop could have that IP cope with.
When you make a request to a server, which includes for a Web page, the Web server knows which IP cope with made the request. The facts are then sent via the Internet and again for your laptop. This is just like whilst someone sends you mail to your home. The cope with on the mail allows it to be added to your own home and no longer elsewhere.
Connecting Multiple Computers
How can more than one computers join if only one dealing with is assigned? When you make a request for a Web page, how does it realize which computer asked that web page? Let’s take our domestic analogy one step similarly. Let’s say in place of living in a residence, you stay in a condominium. When someone sends you mail, they no longer simplest consist of your cope with but also a rental number. This range is internal for your condominium constructing and each rental has its very own unique number. Similarly, more than one computer systems can hook up with the Internet if they ever had there owned particular local IP address. This may be treated by a router.
A router is a bit of hardware that connects immediately to the modem. Each pc is then linked to the router, in preference to the modem. Now in reference to your computer having the IP address furnished by your ISP, your router now’s assigned that IP copes with. This is just like your router acting because of the rental constructing.
The beauty of a router is that it can assign its personal neighborhood IP addresses. When you join a laptop to the router it now receives one of the IP addresses assigned via your router, just like how each condo has its own quantity. Now when you make a request for a Web page, the request is despatched the use of the equal ISP deal with, but this time it’s far assigned to the router. When the Web web page is back, the router receives the request and sends it locally to the laptop that requested the web page.
The router also has its very own nearby address that is just like the nearby IP addresses of the computers. So now the router has addresses assigned to it: an external one furnished by using your ISP, and a nearby one furnished by it. This allows the router to connect with both the Internet and the nearby community.
Let’s check this situation. You have a router connecting a couple of computer systems to the Internet. But now you want to create an FTP or Web server. No trouble. You set up the vital software on a pc for your community, advised a person outside your community the neighborhood IP cope with of your FTP server and they are attempting to attach. They then discover that they cannot join. Why? It’s just like a person mailing something to you by way of simply specifying your apartment number and no cope with.
The IP deal with assigned for your pc is nearby on your community. You can connect with that computer from within your community, but no longer from the Internet. You will want to use your ISP-assigned IP address (the only assigned for your router) to have someone from the Internet connection with your FTP server. The trouble is that your router is assigned that IP and not your pc, and considering the fact that an IP address has to be particular, how can computers have the same IP? The solution: they can not, but they do not want to.
Routers have the ability to ahead statistics on a port to a selected laptop. A port is a numbered channel that facts may be despatched through on a community. You cannot bodily see it as it’s for a virtual channel used drastically in networking for sending/receiving statistics. 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 deal with of your FTP server and the port number after which shop that information. Now when a person tries to get admission to your FTP website, they must use the ISP IP cope with that is assigned to your router. The router will then observe that the information is being sent on port 21 after which forward it robotically to your FTP server. A Web server may be set up the equal manner, however, its default port is normally 80.
Note: By default, a router will dynamically assign IP addresses to the computer systems linked to it. This manner that the first computer to hook up with the router will get the primary to be had IP cope with, and the next will get the second one, and so on. If you control an FTP server, it is able to be less difficult to assign a static IP deal with to the computers to ensure that the FTP server continually has the equal IP address.