Since the lanes are in parallel, the transmission delay is the same regardless of the number of lanes.


There's no simple answer. How data is distributed across multiple lanes depends on the exact physical layer variant. With 1000BASE-T, possibly the most popular multi-lane variant, the four five-level symbols transmitted simultaneously form a four-dimensional tuple (4D-PAM5). Each symbol at 125 MBaud effectively transports two MAC bits, resulting in an ...


The IEEE standardized Provider-Backbone Bridging (PBB), also known as MAC-in-MAC encapsulation, as 802.1ah, which has been integrated into the 802.1Q standard. PBB is, aside from 32 bits service encapsulation, basically plain Ethernet frames as a payload of other Ethernet frames. A typical PBB frame looks like this: 0 1 0 1 2 3 4 ...

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