5. The hexadecimal representation of ASCIl code for character 'A' is 41H. What is the 8-bit checksum for 'A', 'B', 'C', and 'D'? a) 00001011 c) 00001010 b) 11110100 d) 10001010 6. If the baud rate of a transmission medium is 400 for a 4-PSK signal, the bit rate is_bps? a) 100 c) 800 b) 400 d) 1600 7. What is present in the control field of all types of HDLC frames? a) PIF bit c) N(S) b) N(R) d) FCS 8. In error reporting the ICMP packet encapsulated in an IP datagram goes to a) the sender of the P datagram in error c) a router b) d) the receiver of the IP datagram in error any of the above