If they are using the same protocol and allow you access to their network, there should be no problem.  Since you don't say which wireless network card you have nor do you provide information on what protocol your clients are using, it is difficult to be more specific.

I have an 802.11b/g wireless network card.  It works at hotels airports, and hotspots with non-secure wireless networks.

Steve

Thanks for the quick reply...I am using an Intel Pro Wireless 2915ABG - I don't know anything about their setup. I will have to find out if they have a secured or non-secured network.

Kali 

With that card you should be able to connect to any wireless network.  If it is a secure network, they will have to provide the pass key to you before you can connect.

Steve

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@kalimca wrote:

Thanks for the quick reply...I am using an Intel Pro Wireless 2915ABG - I don't know anything about their setup. I will have to find out if they have a secured or non-secured network.

Kali

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I would say there's a 95%+ chance they have it secured. Many companies add an additional layer of security by also requiring use of the company's VPN to access their network. (i.e. even with WEP or WPA, proper security practice is to still consider the wireless LAN to be an untrusted network)

Chances are that even if they have a wireless setup, you won't be able to access it due to the security.

Most companies have plenty of wired Ethernet ports in any place anyone might be giving a presentation.