7.1.5 IEEE standard + bluetooth 802.15
7.2.2 CSMA/CD Ethernet
	listen before talk (CS)
	listen while talking
	wait before talk again
      CSMA/CA wireless


7.2.3 
simplex  	radio
half-duplex	walky-talky
full-duplex	phone

7.3.5
MAC address keeps changing along the way
Ip address remains the same all the way

7.3.5 Ethernet frame format

8.3.1 media standard

8.3.3

8.3.8 fiber types