Does Steam use different servers then non-steam games?

[Sirrus]

So I was playing COD4 last night and my friend messaged me and said he wanted to play with me. I gave him the name of the server I was playing in and he said he couldn't find it. After realizing that he was using just a box install of COD4, it raised the question: Do people playing off of Steam host a different set of servers than the people using Steam?

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[naturemon]

I was wondering this at one point too, I have never played a game like that off steam though.

[Marcem]

No.

[snot2]

if they did then you wouldnt have seen that person using the retail version

[naturemon]

if they did then you wouldnt have seen that person using the retail version

He didn't >.>, thats why he asked.

[Sirrus]

if they did then you wouldnt have seen that person using the retail version

Messaged me on Facebook*

[MrCookie]

i play with my friend a lot on BFBC2 and he has the Steam version, while i have the retail

[Ethan]

I got my L4D from a store (boxed version) and I play with everyone who has steam version.

[Antallion]

I got my L4D from a store (boxed version) and I play with everyone who has steam version.

l4d is a valve game