How come a PC can connect to a Switch using Crossover copper, and sometimes a Straight-Through Copper?
The below topology is in my Cisco Network in Packet Tracer.
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Newer switches can automatically detect if a cable is crossover or straight through and negotiate the correct mode in order for the host to connect correctly, also called MDIX auto.
Auto-MDIX on an Interface
When automatic medium-dependent interface crossover (auto-MDIX) is enabled on an interface, the interface automatically detects the required cable connection type (straight through or crossover) and configures the connection appropriately. When connecting switches without the auto-MDIX feature, you must use straight-through cables to connect to devices such as servers, workstations, or routers and crossover cables to connect to other switches or repeaters. With auto-MDIX enabled, you can use either type of cable to connect to other devices, and the interface automatically corrects for any incorrect cabling.
Auto MDI-X is enabled by default on Cisco switches.
The Cisco 2950 does not support this feature.