Functions of OSI and TCP/IP Layers Q.5

5A router has two full-duplex Ethernet interfaces each operating at 100 Mb/s. Ethernet frames are at least 84 bytes long (including the Preamble and the Inter-Packet-Gap).
The maximum packet processing time at the router for wirespeed forwarding to be possible is (in micro-seconds)

Option : B
Explanation : Minimum transmission time
= (84 bytes) / (2*100 bps)
= (84 * 8 bits) / (2*100 bps)
= 3.36 seconds

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