Which two statements about HDLC are true? (Choose two.)
A. It supports clear-text authentication
B. It supports both synchronous and asynchronous serial links
C. The packet header contains the control field and address
D. It is a frame-oriented data link layer protocol
E. It guarantees error-free transmission
I agree with davy67wfc if there was “frame” instead of “packet” then C is correct but in this case only B and E seem to be correct.
C & E
Compare to 165 and 303
Correct answer is B and E
Packet is a layer 3 term, so C cannot be correct
correct answer B & C , HDLS is is a bit-oriented not frame oriented , support synchronous or asynchronous balanced mode .