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Windows 7: Local Area Connection doesn't have a valid IP configuration

14 Mar 2015   #11
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

A modem is a modem and a router is a router.

The switch is not the problem.

The pc is not the problem.


My System SpecsSystem Spec
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14 Mar 2015   #12
doctore

Windows 7 Pro
 
 

Quote   Quote: Originally Posted by AddRAM View Post
A modem is a modem and a router is a router.
Far from it, my modem is also a router, for example. A router doesn't have to necessarily be a separate box, many modems these days come with both integrated routing and switching capabilities. Whether the router will be integrated into the modem box or a separate device - it's irrelevant.

What is also irrelevant is the brand of his modem. Networking devices operate on standards. It's clear that he has a DHCP issue, so a look at the dhcp settings is the best way to determine the problem.



P.S. I just saw that you edited your earlier post...with tons of erroneous information, to boost. You have no idea what a router does, apparently. So I will explain it to you really quick:

routers simply connect networks and they do so based on IP addresses (Layer 3 in the OSI model)

As far as connecting your modem directly to your computer - you can't do this unless:

1. You have entered a proper static IP.
2. Your modem offers DHCP services.

If your modem has DHCP - that means it has a router, as only routers (and layer 3 switches) can switch traffic based on IP addresses. Which also brings us to NAT, another router feature that a modem would not have. What the modem does, let's say a cable modem, is to translate your Ethernet frames to DOCSIS, for instance.
My System SpecsSystem Spec
16 Mar 2015   #13
Ztruker

Windows 10 Pro X64
 
 

Here is a nice, simple (sort of) explanation of what a switch is and does.

Quote:
No, a switch cannot perform NAT and translate public(s) IP addresses into private addresses.
A switch is a network device that filters and forwards packets between LAN segments. Switches operate at the data link layer (layer 2). So, they are not aware of IP addresses which are network layer (layer 3). A switch keeps a record of the MAC addresses of all the devices connected to it. With this information, a switch can identify which system is sitting on which port. So when a frame is received, it knows exactly which port to send it to, without significantly increasing network response times.
My System SpecsSystem Spec
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 Local Area Connection doesn't have a valid IP configuration




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