to connect similar devices..like one switch to another switch
The difference between a cross cable and a state cable is that a cross cable, or crossover cable, is used specifically to connect two of the same devices.
cross cable
Cross cable.
cross cable
cross sectional area of cable * voltage drop
Ethernet cross-over cable
cross over cable
No, it does not matter if the cable wires cross over. It should not cause any problems if they cross over. However, there are several products that allow them to cross over to add on benefits.
Match up the two ends of the cable. Look closely at the color coding of the pins at both RJ-45 connectors. If the same colors are used in the same pin positions then the cable is a straight-through cable. If they are reversed at both ends then it is a cross-over cable.Sometimes the cable will be marked that way on the outside covering of the cable. Look for the words "cross-over cable".
neither, you need a rollover cable
You can measure its diameter with a micrometer. For this the cable does not have to be vertical.
Simply work out the area of a section of cable.........