high speed DSL connectivity

[James Knott]

Teodor Iliescu wrote:
> On Sun, 14 Sep 2003, Fraser Campbell wrote:
> 
> 
>>No dhcp is a protocol for assigning IP addresses on Ethernet networks (perhaps 
>>others?), it is far from obsolete.  Never heard of it being used with dialup 
>>but who knows.
> 
> 
> The RAS(remote access server) server usually acts as a DHCP server,
> handing out IP addresses to clients connecting over a dial up modem. That
> is why, when you use dial-up, your IP address changes constantly.
> 
> On the RAS's side, all you would have to configure is the range of IP 
> addresses that the clients are going to receive.

You're a bit confused.  While IP address from RAS or other dial up 
access appear dynamic, they don't use dhcp.  Normally, a phone line is 
assigned it's own IP and whatever computer connects to that line, gets 
that IP.  If there are multiple lines, there will be mulitple IP 
addresses, and whichever address you get, depends on what line you 
connect to.  From the user point of view, the addresses are dynamic (not 
dhcp), but from the ISP point of view, they're static.  On the other 
hand, dhcp is used on ethernet, token ring or other multiple access 
networks, to assign IP addresses, on an as needed basis.  A dial up line 
has no need of a dhcp server and using one wouldn't help an ISP.



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