Factors that can affect the response times on a LAN?

Hi, I assume the cable is UTP cable. 1. Cable length (from the switch/hub to the PC) is more than 100 meters
2. Poor crimping (putting connector)
3. Poor connections Jack panel
4. The IRQ address of the LAN card is clashing with any other device in the PC
5. Connecting 100Mbps card to 10Mbps network
6. IP address clash with another PC's IP address (same IP defined in more than 1 machine)
7. Route table definition in the Switch/Router Things like this are the main cause of poor performance Hope this helps