state the difference between crossover cables and patch cables
state the difference between crossover cables and patch cables
If an intermediate device like a switch or hub connects two devices, it has to perform a crossover internally to connect the transmit pair of one of the devices to the receive pair of the other device.
You can use crossover cables to connect the same types of network devices, such as two switches or two hubs. You can even connect two end systems to assist with troubleshooting.
Crossover cables are made from standard unshielded twisted pair, or UTP, cable, but have the connectors wired oppositely. This allows the transmit pair on one connector to connect to the receiving pair on the other connector, without the need for an intermediate system.
Note You can create a crossover cable using T568A wiring on one end of a patch cable and T568B on the other end.
Cable connection types can be automatically detected and configured using Auto-medium dependant interface, or Auto-MDIX, capabilities. For this reason, crossover cables aren't usually needed in modern twisted-pair Ethernet networks
A rollover cable is not a networking cable( Usually blue) - it is only used to connect a PC directly to a router or switch to configure it. The port on the router or switch that the PC connects to is not a regular network port, but is known as the management or console port.
A rollover cable has an RJ45 connector on the router end and a serial port connector on the PC end.
It's called a rollover cable because, like a cross-over cable, the pins are configured differently on each end of the cable.
Rollover cables, sometimes referred to as Yost cables are most commonly used to connect to a devices console port to make programming changes to the device. Unlike crossover and straight-wired cables, rollover cables are not intended to carry data but instead create an interface with the device. This format is used for RS-232 connectors that attach to serial ports on computers, printers, or monitors. Serial ports are old news and you shouldn’t need to worry about buying a rollover cable
A patch cable or patch cord or patch lead is an electrical or optical cable used to connect ("patch-in") one electronic or optical device to another for signal routing. Devices of different types (e.g., a switch connected to a computer, or a switch to a router) are connected with patch cords. These patch cables are widely used for connecting the computer to the switches, hubs, or routers or wall socket to device (PC).