network layer representive naming

Application : message
Transport : segment
Network : datagram
Link : frame or packet

10Base5 ⇒ 10Mbps signal aapproximately 500 meters (expensive)
10BaseT ⇒ 10Mbps baseband signal, Ethernet over twisted-pair
100BaseTx ⇒ 100Mbps twisted-pair ( four pairs of twisted-pair wire)


 Crossover Cable