Personal host 568A-568B
Personal host to server 568A-568B
Personal host to HUB 568B-568B
Hub 568A-568B
Hub to router 568B-568B
Router to Router 568A-568B
Personal host to switch 568b-568b
Switch Cascading 568A-568B
Switch interconnection 568A-568B
568A: White Green, Green, Bai Orange, Lan, Branda, Orange, White Brown, Brown 568B: Bai Orange, Orange, White Green, Lan, Branda, Green, White Brown, Brown;
Network switches and bridges, working on the data link layer repeater, hub (multi-port repeater), belongs to the physical layer device router working on the third layer (network layer)
Single work: Data unidirectional transmission (radio broadcast) semi-duplex: Data can transmit two-way transmission, but cannot transfer (walkie-talkie) full duplex at the same time: data can be bidirectional (telephone)
Class A 0-127 0 8-bit 24-bit Class B 128-191 10 16-bit 16-bit Class Class Class 192-223 110 24-bit 8-bit D class 224-239 1110 multicast address E class 240-255 1111 reserved test use
