Various connection time to SQL Server accross a LAN

I am connecting to a SQL Server Express 200开发者_如何学Go5 on another PC on our company LAN.

On my PC (which has Windows7) the connection is immediate. On our tester PC (who has Windows XP), the connection takes about 5 to 6 seconds every time. This is the same network and the same server.

I am not talking about a connection through an application, but also through the control panel or anything else.

Any suggestion where this time difference may be coming from, what setup option might be involved or how we can speed up the connection on the XP PC?

Is the XP computer using an IPv4 address while you and the server are using IPv6? Could be an issue with the routers/switches along the way.