Text 23666, 62 rader
Skriven 2006-11-16 16:08:00 av ED VANCE (1:123/140)
     Kommentar till en text av JEFF GUERDAT
Ärende: Re: IP addy.
====================
JG>ED VANCE wrote:

JG>> Along the same line of thought about IP addresses varying I have noticed
JG>> when I type IPCONFIG /ALL from a CMD command line some of the IP
JG>> addresses change.
JG>>
JG>> The lines I see changes in are:
JG>>
JG>> IP Address
JG>> Subnet Mask
JG>>
JG>> Sometimes the Default Gateway IP address is changed but I have noticed
JG>> that when it is changed the address is almost the same as the
JG>> IP address, and also there is additional address printed below the
JG>> DNS Servers address.

JG>Sounds like you don't have a router/firewall installed.  You don't need
JG>one as long as you have a software firewall that's properly configured
JG>but it's still recommended.

Jeff,

You're right, I don't have a router (yet).
Jay might fix that for me though.   ;-]
I do use Zone Alarm Free for a firewall.

JG>The reason the address, etc. changes is due to the ISP doing what it
JG>needs to do in order to maximize it's limited range of IP addresses used
JG>by it's customers.  I find that my address (taken by the router) rarely
JG>changes which probably means that there's a bigger pool of addressses
JG>available.  Of course, it HAS changed over the years, just not often.
JG>BTW, DHCP generally tries to claim the last used IP address again but
JG>it's up to the DHCP server to decide whether you get it.

I guess since this XP computer is always connected to the DSL Modem what
I am seeing as addresses when I do a IPCONFIG/ALL in DOS while I'm NOT
using my browser on the net is address data received by the DSL Modem
anyway.

JG>You're correct in noticing that the gateway changes to a near match to
JG>your address since it's most typical to have the gateway be on the same
JG>subnet.  Also, you should always have more than one DNS server since
JG>activity may make a sole server "disappear" on occasion, essentially
JG>breaking your ability to use the Internet.  Note that, with the use of a
JG>router, what you'll see on a computer will never change unless you then
JG>put yet another computer on the network in your house.

You mention having more than one DNS server, I guess I'll understand
this more when I get a router and read the book and the help files.

JG>> Another thing I'm wondering about is, does the Physical Address
line JG>> mean the same thing as the MAC address I've seen talked about
here?

JG>Yup.

Thanks.


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