Network Programming Input Port Processing Speed

Question

So I'm using Computer Networking Top-Down approach and I do not get why:

If you have a 10Gbps input link and a 64-Byte IP datagram, why does the input port only have 51.2 ns to process the datagram before another datagram arrives?

Answer 1

GB is short for Gigabytes. Gb is short for Gigabits.

8 bits = 1 byte

The tech industry measures data storage using GB (gigabytes). But it measures data speeds using Gb (gigabits).

So for example, you might buy a 500GB hard drive. That’s 500 Gigabytes of storage. But your broadband connection to your home might be 10Gbps, i.e, the transmission rate of the connection is 10 Gigabits per second.

Answer 2

Because 64B*8bpB/10Gbps = .0000000512s = 51ns, by cancellation of units.