Suppose there are two devices that can transmit with same throughput (e.g., 10Gb/s). Suppose that one device is connected via single-lane cable while the other with multi-lanes (e.g., 8 lanes). Will the transmission delay be affected by the number of lanes?

  • 1
    Both will transmit 10 Gbps. That means that the hosts sending the data will put the data on the wire at the same rate.
    – Ron Maupin
    Oct 26 '20 at 14:02

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

  • Thanks :) Follow question: in multi-lane ethernet, are the lanes are synchronisys? i.e., if the symbol of byte 1 of a packet is sent in lane 1, the symbol of byte 2 of a packet is sent in lane 2, then symbol of byte 1 will be received before byte 2? Oct 26 '20 at 14:18
  • 1
    You should ask a separate question about that.
    – Ron Trunk
    Oct 26 '20 at 15:50

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