Consider the following network where each computer is connected to the bus through a NIC. Assume the MAC address of computer 1 is E78D45C4BBFD, of computer 2 is 7E8D4C54BB4D, of computer 3 is 78DF4C84BBF2. Assume computer 2 now wants to send the message "ER" to computer 3. The hexadecimal value for "E" is 45; for "R" is 52.+ NIC-1 P-1 N NIC-2 P-2 NIC-3 P-3 A. To send out the message, computer 2 will first build the frame and forward it to computer 2's NIC. The NIC will then compute the CRC for the frame and add it to the frame. Please draw the format of the final frame which will be sent out by NIC-2. (When drawing the frame, please use hexadecimal values for the header and payload, and use "SOH", "EOT", and "CRC" to indicate the Start of Header, End of Transmission, and CRC codes, respectively). + B. NIC-2 will use CSMA/CD to send out the frame. Before the frame is sent out, computer 2's NIC will first sense the bus for carriers.+ a) If a carrier is sensed, what will NIC-2 do?+ b) If no carrier is sensed, NIC-2 will send out the frame. b.1) Before the frame is sent out, will the frame be first modulated? b.2) After the frame is sent out, will NIC-2 sense the bus continuously for a period of time? Why?+ b.3) Please say TRUE or FALSE: "Since the frame is sent to computer 3, so after the frame arrives at computer 2's connecting point, it will only turn right to computer 3."+ C. When the NIC of computer 3 senses the signal (carrier) sent from computer 2, what will the NIC do (here we assume the minimum length of payload is 2)? Please explain step by step. 4 D. After NIC-3 receives the frame successfully, the frame will be forwarded to computer 3's processor. What is the format of the frame forwarded to the processor? + N E. Will computer 1 sense the carrier sent from computer 2? Will computer 1's NIC forward the frame to computer 1's processor? Why?+ Consider the following network where each computer is connected to the bus through a NIC. Assume the MAC address of computer 1 is E78D45C4BBFD, of computer 2 is 7E8D4C54BB4D, of computer 3 is 78DF4C84BBF2. Assume computer 2 now wants to send the message "ER" to computer 3. The hexadecimal value for "E" is 45; for "R" is 52.+ NIC-1 P-1 N NIC-2 P-2 NIC-3 P-3 A. To send out the message, computer 2 will first build the frame and forward it to computer 2's NIC. The NIC will then compute the CRC for the frame and add it to the frame. Please draw the format of the final frame which will be sent out by NIC-2. (When drawing the frame, please use hexadecimal values for the header and payload, and use "SOH", "EOT", and "CRC" to indicate the Start of Header, End of Transmission, and CRC codes, respectively). + B. NIC-2 will use CSMA/CD to send out the frame. Before the frame is sent out, computer 2's NIC will first sense the bus for carriers.+ a) If a carrier is sensed, what will NIC-2 do?+ b) If no carrier is sensed, NIC-2 will send out the frame. b.1) Before the frame is sent out, will the frame be first modulated? b.2) After the frame is sent out, will NIC-2 sense the bus continuously for a period of time? Why?+ b.3) Please say TRUE or FALSE: "Since the frame is sent to computer 3, so after the frame arrives at computer 2's connecting point, it will only turn right to computer 3."+ C. When the NIC of computer 3 senses the signal (carrier) sent from computer 2, what will the NIC do (here we assume the minimum length of payload is 2)? Please explain step by step. 4 D. After NIC-3 receives the frame successfully, the frame will be forwarded to computer 3's processor. What is the format of the frame forwarded to the processor? N E. Will computer 1 sense the carrier sent from computer 2? Will computer 1's NIC forward the frame to computer 1's processor? Why?