1. Quick Quiz You need a sheet of paper

2. What do these abbreviations stand for? PWM PPM PAM PCM ASK FSK AM FM IF AF RF TRF amp Pulse width modulation Pulse position modulation Pulse amplitude modulation Pulse code modulation Amplitude switch keying Frequency switch keying Amplitude modulation Frequency modulation Intermediate frequency Audio frequency Radio frequency Tuned radio frequency amplifier

3. Circuit switched network Message switched network Packet switched network Permanent link between sender and receiver for duration of message exchange No permanent link established. Entire message sent from router to router. Message split in to small chunks called packets. Each packet sent by different route. Packets sent from router to router. No permanent link established.

4. IP address range Number of hosts Class A Class B Class C

5. IP address range Number of hosts Class A0-1272 24 -2 Class B128 to 1912 16 -2 Class C192-2232 8 -2