Which of the following statements is correct for the use of packet switching?

• A. by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
• B. the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individ
• C. None of these
• D. All of these
• E. the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied

Answer: (D)