Local collision
Encyclopedia
A local collision, in CSMA/CD computer network
s, is a collision
that occurs at the NIC as opposed to on the wire.
On UTP cable a local collision is detected on the local segment only when a station detects a signal on the RX pair at the same time it is sending on the TX pair.
Since the two signals are on different pairs there is no characteristic change in the signal. Collisions are only recognized on UTP when the station is operating in half-duplex
. The only functional difference between half and full-duplex
operation in this regard is whether or not the transmit and receive pairs are permitted to be used simultaneously.
It is important to know that a NIC cannot detect local collisions without attempting to send information.
Computer network
A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information....
s, is a collision
Collision
A collision is an isolated event which two or more moving bodies exert forces on each other for a relatively short time.Although the most common colloquial use of the word "collision" refers to accidents in which two or more objects collide, the scientific use of the word "collision" implies...
that occurs at the NIC as opposed to on the wire.
On UTP cable a local collision is detected on the local segment only when a station detects a signal on the RX pair at the same time it is sending on the TX pair.
Since the two signals are on different pairs there is no characteristic change in the signal. Collisions are only recognized on UTP when the station is operating in half-duplex
Duplex (telecommunications)
A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions. The term multiplexing is used when describing communication between more than two parties or devices....
. The only functional difference between half and full-duplex
Duplex (telecommunications)
A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions. The term multiplexing is used when describing communication between more than two parties or devices....
operation in this regard is whether or not the transmit and receive pairs are permitted to be used simultaneously.
It is important to know that a NIC cannot detect local collisions without attempting to send information.