Calling all computer/tech/IT geeks

[lateralus]

You can't ping a dial up modem because it is not connected to any network and does not have any way to obtain an IP address. As I mentioned before, cable/DSL modems are a different story since they do have IP addresses which are usually assigned by a DHCP server at your ISP. You might(and it's a big might) be able to assign a private IP to a modem that is connected to a terminal server or RAS but I don't think so. There is such a thing as a LAN modem that is basically a modem with it's own PC/NIC card and acts like a communications server.

Of course a modem can get an i.p. address. They're dynamic (they change every time you sign on). If a modem couldn't get an i.p. address, how does a web server know where to send the data to?

hey imma computer retard. can anyone help? (this is going to be really dumb) I can't use my direct connect feature on AIM with anyone besides my roommate (same network). I've tried to work everything on my firewall to no avail. any other tips? can i direct connect with someone on a mac (i use xp home)?

Well, it's either your firewall settings, or you haven't enabled direct connections in your AIM settings.

lateralus Reviewed by lateralus on 12-06-2005. Calling all computer/tech/IT geeks Anyone have any good stories about end users or management and their sometimes outrageous requests? For example, trying to keep the fools from downloading adware or trying to keep the old tired pc's running because the management doesn't want to spring for new gear or those "special" customers who can't grasp a concept no matter how or how many times you explain it to them? Rating: 5

[bonsaiguy]

Of course a modem can get an i.p. address. They're dynamic (they change every time you sign on). If a modem couldn't get an i.p. address, how does a web server know where to send the data to?Well, it's either your firewall settings, or you haven't enabled direct connections in your AIM settings.

Notice I mentioned 3 distinct types of modems. A dial up modem does not have any capacity to obtain an IP address that I am aware of and I worked for a modem manufacturer for 4 years. It's simply a dumb pipe that connects between point a and point b. The IP that is assigned when you dial in to AOL or Earthlink or any other provider is assigned at the ISP end and only to the server that the modem is attached to. At the ISP end the modem is usually connected to some kind of RAS (remote access server) along with a boatload of other modems. The RAS, which IS connected to a network knows which port to requested a given web page and sends the data from that web page back to the correct port. That being said, most ISP's are now using ISDN PRI's as opposed to dedicated lines and each channel on the PRI is assigned an IP address. Which, along with compression algorithms and cacheing technology, accounts for the so called high-speed dial up connections being advertised by folks like NetZero. So basically, since a dial up modem is not directly connected to a network, it cannot obtain an IP address.