control is achieved 9. In a data link control protocol, by retransmission of damaged frames. A) DLHC B) data C) error D) flow 11. Frequency division multiplexing can be used with signals. A) digital signals carrying digital data B) analog signals carrying digital data C) analog D) digital 12. Synchronous time division multiplexing can be used with signals. A) analog B) digital signals or analog signals carrying digital data C) digital D) digital signals carrying digital data 13. Circuit switching was developed to handle traffic A) voice B) A/V C) video D) data 14. With _ a dedicated path is established between two stations for communication. A) block switching B) packet switching D) X.25 C) circuit switching