Identifying a cross-over cable
Not sure if you have a straight or cross-over Ethernet cable? This simple visual test can tell you in two seconds.
Cross-over cables, while still needed occasionally, are becoming less relevant as modern router and switching equipment has builtin automatic sensors to compensate.
For instance, there was a time when the only way to connect two switches together was via a crossover cable. However, today, most switches will accept either a straight or cross-over.
