How Fast Can a Port Transmit Packets?
The rate at which a CA port can transmit packets is defined by two factors:
The speed at which a bit stream can be transmitted over the wire (or fiber). The only speed currently supported is 2.5Gb/s (Gigabits/second), but future versions of the specification may permit faster transmit speeds.
The number of transmit paths (i.e., lanes) the port implements. A port implementation may support one (1x), four (4x), or 12 (12x) lanes.
This yields one of three transmit speeds:
A 1x port can transmit packets at 2.5Gb/s.
A 4x port can transmit packets at 10Gb/s.
A 12x port can transmit packets at 30Gb/s.
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