and what other networking components can be used in wide area network
i have also another question is the computers used by ISP is same like personal computers or they might use a large local network to serve that big numbers of participants
explanation in details will be appreciated and thx
2006-11-10 07:59:51 · 6 answers · asked by Anonymous in Computers & Internet ➔ Computer Networking
A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. Routing occurs at Layer 3 (the network layer i.e. Internet Protocol (IP)) of the OSI seven-layer protocol stack.
click here:http://en.wikipedia.org/wiki/Router
Gateway has several meanings. It may often share meanings with the term gate.
click here:http://en.wikipedia.org/wiki/Gateway
2006-11-10 08:07:52 · answer #1 · answered by Anonymous · 4⤊ 0⤋
ISPs generally have far more demanding equipment needs than the average company. They may start small for an ISP, with a medium sized router or two, and a few webservers as a nice source of extra income.
Let's look at an example of a very small operation... this is technically an ISP, and could actually be a profitable one.
A very small ISP selling dialup access to 20 customers might have a router with a T1 card, and a module with 16 modems. (I'm basing this on Cisco's 2811 and accessories) They'd probably also have a webserver for extra income, and host some local websites. Altogether, I'd expect about $10,000 in equipment and a phone/internet bill of $1000 -2000 a month.
You might also sell internet access via wireless to your next door neighbors. Technically, you're not allowed to share or resell most high speed internet connections, to be legal, you'd probably still need to buy a T1 line, so the equipment would be largely the same, probably $6000 -10,000 worth of equipment.
If you're curious about the equipment that a medium/large ISP would use, this is a good place to start. http://www.cisco.com/en/US/products/hw/routers/index.html#routers-for-sp
If you're considering starting an ISP, I'd consider hiring one of the techs of another ISP as a consultant to help you plan... they can be very profitable businesses, as you have extremely low labor costs and you can run the business with very little real estate.
By the way daimi_moaz, Wireless Access Points are layer 2 devices. Routers are commonly sold with switches or wireless access points built in - so if you buy a Wireless Router what you're getting there is both a layer 3 device with a layer 2 device stuck on.
2006-11-10 08:58:59 · answer #2 · answered by btoblake 3 · 0⤊ 0⤋
It is one and the same. For any site if you have one router which connects to inetrnet then that will be Gateway for all the all the computers in underneath network.
I can define it as:
"Gateway is the Next immidiate Layer three device for any workstation to communicate eith Internet"
Do not get confused with Wireless Gateway or Wireless Router, those are nothing but wireless modems. they do not provide layer three access.
2006-11-10 08:28:27 · answer #3 · answered by daimi_moaz 2 · 0⤊ 0⤋
In simple terms:
Routers can only be used in conjuction with either a ADSL/ cable modem BUT
A gateway usually means a combination of a router and a modem
2006-11-10 08:17:06 · answer #4 · answered by Dude4736 2 · 0⤊ 0⤋
to add to the above answers.
a router is a gateway but a gateway is not always a router.
2006-11-10 10:15:57 · answer #5 · answered by sjj571 4 · 0⤊ 0⤋
google has the answers you seek
2006-11-10 08:05:01 · answer #6 · answered by bsmith13421 6 · 0⤊ 1⤋