What do the numbers on graphs mean?

Hello,

I'm using ntopng Enterprise/nProbe Pro.

I have a switch setup to send only the flows from one 10G interface to
the nprobe machine.
In the traffic dashboard there are some graphs, but I don't know what
they signify.
If you look in Cacti, the traffic is about 7.7Gbps. In ntopng is 2.03Gbps?
Also, what do 2.28Mbps and 157.22Mpbs from the footer mean?

Below the graphs from ntopng and Cacti.








Best regards,
Dan Craciun

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