Penetration Testing mailing list archives
Re: Layer 2 Trace
From: James Eaton-Lee <james.mailing () gmail com>
Date: Sat, 03 Dec 2005 20:00:45 +0000
On Sat, 2005-12-03 at 11:44 -0800, Gary E. Miller wrote:
You are confusing layer 2 and layer 3. There are no IPs on layer 2! I often put several layer 3 IP subnets on one physical layer 2 net. You can do this with or without using VLAN tagging.
I was trying to explain the distinction between a layer 2 segment and a larger network operating over layer 3 using layer 3 terminology - not quite confusing the two, but yes, you're right, I should have been clearer there. What I would have said if I'd had any sleep would have been: "Layer two only provides connectivity to machines attached to the same segment. In the case of a layer three network using TCP/IP this means the local network segment, such as a 192.168.0.1/24 class C subnet of 255 hosts". This subnet has layer two connectivity - anything further afield doesn't". ;) - James, who will now proceed to get some sleep
RGDS GARY - --------------------------------------------------------------------------- Gary E. Miller Rellim 20340 Empire Blvd, Suite E-3, Bend, OR 97701 gem () rellim com Tel:+1(541)382-8588 Fax: +1(541)382-8676 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDkfWw8KZibdeR3qURAm4nAJwPG88aficwJ3du7Di8UHlGBrB+rACg1qIG D18qAo8Humhy1m4MlOk6eUI= =6wNE -----END PGP SIGNATURE-----
-- James (njan) Eaton-Lee | 10807960 Semper Monemus Sed Non Audiunt, Ergo Lartus - (Jean-Croix) sites: http://www.bsrf.org.uk - http://www.security-forums.com ca: https://www.cacert.org/index.php?id=3
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Current thread:
- Layer 2 Trace riftman (Dec 02)
- Re: Layer 2 Trace James Eaton-Lee (Dec 03)
- Re: Layer 2 Trace Gary E. Miller (Dec 04)
- Re: Layer 2 Trace James Eaton-Lee (Dec 04)
- Re: Layer 2 Trace Gary E. Miller (Dec 04)
- Re: Layer 2 Trace Carles Fragoso i Mariscal (Dec 03)
- Re: Layer 2 Trace Francois Labreque (Dec 03)
- Re: Layer 2 Trace James (Dec 05)
- R: Layer 2 Trace Massimo Baschieri (Dec 06)
- Re: R: Layer 2 Trace James (Dec 27)
- Re: R: Layer 2 Trace Maciek Dudek (Dec 28)
- R: Layer 2 Trace Massimo Baschieri (Dec 06)
- Re: Layer 2 Trace James Eaton-Lee (Dec 03)
- <Possible follow-ups>
- RE: Layer 2 Trace Dario Ciccarone (dciccaro) (Dec 03)
- Re: Layer 2 Trace riftman (Dec 03)
- Re: Layer 2 Trace Cedric Blancher (Dec 04)
- RE: Layer 2 Trace Kyle Quest (Dec 05)