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I use Windows 7 and am connected to a LAN. In cmd I typed ipconfig.

  1. There were many headings reading "Tunnel adapter local area connections" (with 13/19/17 appended to it). What does this mean?

  2. Also there were physical addresses like this some kind of MAC address?

share|improve this question
@slhck...thanks...i edited this question u can take a look...other two questions are....1 and 2 – avinash Dec 30 '11 at 10:00
Looks good to me, thank you! – slhck Dec 30 '11 at 10:03
on point 2. here, what was the context of the 'physical address' or does it just say; Physical Address: blah blah blah? – CodeBlend Dec 30 '11 at 10:11
@CodeBlend...i have edited the physical address...these kind of physical addresses were defined under heads like tunnel adapter connection 13/14/17/19...,tunnel adapter isatap... – avinash Dec 30 '11 at 13:59

As per the screenshot, when you have these:

  • Tunnel Adapter Local Area Connection* 13
  • Tunnel Adapter Local Area Connection* 17
  • etc.

Vista - Anyone know what "Tunnel Adapters" are in ipconfig?

Puppy Breath - Re: Anyone know what "Tunnel Adapters" are in ipconfig?:

Tunneling is how you do secure (encrypted) communications across an untrusted network (the Internet). Those look like IPv6 tunneling. See these pages:

or search for "Vista Teredo Tunneling" or something like that at MS or Google.

Teredo tunneling

ipconfig shows 'tunnel adapter' what is it?:

Forum Editor - Posted August 19, 2007 at 12:36PM

it's pretty dry and complicated, and a full explanation would have us both asleep in minutes.

Suffice it to say that it's concerned with a Windows networking component called IPv6, which handles network addressing.

You could disable IPv6 if you don't want these to display

How Do I Find the MAC Address (Physical Address) of My PC?

Lots of information will be displayed, but what you need is in the Ethernet Adapter Local Area Connection section. Write down the Physical Address that looks like "0A-B1-C2-D3-E4-F5". This is the "MAC Address."

Your MAC Address (Physical Address) almost always starts with a zero. If you're writing down a number that does not start with "0" you've probably got the wrong number.

Standard Group MAC Addresses: A Tutorial Guide

I think the first two bits bar the odd exception are 00, so I am not sure why yours wouldn't:

This document implies that for an individually, globally assigned MAC address the first two bits will be zero. The first two hexadecimal digits of the MAC address (i.e. '08') represent the first eight bits and, in your case, the first two bits are, infact, zero.

share|improve this answer mac address doesn't start with 0 – avinash Dec 30 '11 at 14:02 is the screen shot – avinash Dec 30 '11 at 14:11
Not sure about a MAC address that doesn't start with a 0 hmm =S – CodeBlend Dec 30 '11 at 14:21
Your answer doesn't really read easily. It's a collection of links. Would you mind adding a bit of text actually explaining? – slhck Dec 30 '11 at 14:45
@CodeBlend...i understood answer to first question...have u answered my second question(i cant make out)? – avinash Dec 30 '11 at 16:59

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