True or False

. ( In full-duplex communication, a source and a destination cannot send signal at the same time. 2. () In simplex communication, a source sends information and a destination cannot 3. ) In half-duplex communication, a source and a destination cannot send signal at the same time. If one sends data, then the other has to wait to send its data. 4. ) If a signal is periodic with T seconds, then s(t) s(t+T) for every time t. 5. () Analog signals' amplitude is continues and it can be any real value 6. () Digital signals' amplitude is continues and it can be any real value 7. () In serial communication, bits are sent consecutively; that is, one bit at a time is sent. 8. () The spectrum of a signal out of its absolute bandwidth is zero. 9. ( ) Twisted pair cables are easier to work with and cheaper than the optical fiber cables. without repeater. 11. ) Coaxial cable can transmit data at higher rates than the optical fiber 13. ( The inner and outer conductors in a coaxial cable act as a shield for 12.) Coaxial cable can transmit data at higher rates than the twisted pair cable 14. Optical fiber cables can transmit signals much longer distances than coaxial cable 15. ) The lower the frequency the larger the attenuation for 16. ( An antenna is a conductor which converts electric current into electromagnetic electromagnetic waves flowing in between these conductors without repeaters cable twisted pair and coaxial waves and it also converts electromagnetic waves into electric current. 17. () The same antenna cannot be used for both transmitting and receiving