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


1

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 ...


1

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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