I am studying for the switching exam and I am converting ip multicast
address to ethernet addresses.
What i don't get is that they state in the Cisco press book (page 294/295)
"the least 23 least significant bits of the ip multicast group are place
into the frame..."
"half of the ethernet block 01:00:5e:00:00:00 to 01:00:5e:7f:ff:ff
correspond to ip multicast...."
I really only use twenty when I am converting from binary to hex.
Scenario: 224.138.8.5 (to use their example)
1110 0000 1000 1010 0000 1000 0000 0101
01:00:5e:0A:08:05
Since the 01:00:5e:0 are always going to be, then I am only concerned with
the least significant 20. Is this right?
I did their exercise on page 319/320 and got 100% (their is an errata for
on of the address but it is a decimal to binary error) but I did not
use the 01:00:5e:0 as the base but 01:00:5e:
Thanks!
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