Hmm, I'm not sure about B. Putting a port in loopback could definitely affect customer data flow, unless they've got some kind of magic loopback mode. Time to consult the networking genie!
As an IT technician, I can confirm that Option E is true. Mirroring will still work while in loopback mode. It's like having a virtual mirror ball - just don't try to disco dance with it!
I agree with A and F too. The loopback control PDU should direct the remote port to enter loopback mode, and only the OAM frames should be allowed through.
C and D are true because both ports need to rediscover each other's capabilities and continue sending Information PDUs to avoid going back to discovery mode.
Frank
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