a patch cable is created using either the EIA/TIA 568 A or B standard at both terminations. a crossover cable is created by terminating one end with the EIA/TIA 568 A standard and the other end with the EIA/TIA 568 B standard. A crossover cable is used to connect two like devices, such as switch to switch, pc to pc, etc... A patch cable (or straight-through) is used for connecting two unlike devices, such as pc to switch, switch to router, etc... although, due to MDIX, some components are not dependent upon using either X-over or Straight-through cables because they can dynamically use either type of media.
Crossover and Straight-through are not the only cable types either. There are a few more such as Rollover, and a different configuration for GigEthernet
· 9 years ago