Computer Networking
What is the main difference between DDCMP and SDLG?

DDCMP does not need special hardware to final the beginning of a message.
None of these
SDLC has a IP address
DDCMP has a message header
SDLC does not use CRC

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Computer Networking
Which statement describes a spanning-tree network that has converged?

All switch and bridge ports are either blocking or looping.
All switch and bridge ports are assigned as either root or designated ports.
All switch and bridge ports are in the forwarding state.
All switch and bridge ports are in either the forwarding or blocking state.

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