There are two courses: EIA / TIA 568B standard and EIA / TIA 568A standard. T568A Line 1 2 3 4 5 6 7 8 Green White Green Orange White Blue Blue White Orange Brown White T568B Line Sequence 1 2 3 4 5 6 7 8 Orange White Orange Green White Blue White Green Brown White Tread: Two Heads All according to the T568B line sequence standard connection. Cross-line: One head is connected in line sequencing, one head is connected to the T568B line sequence. 1. NIC and NIC: Use a crossline connection. 2. NIC and switch: twisted pair is a straight line connection. 3. Switch and hub: The switch can also be connected between the switch and the hub. 4. Hub and hub (switches and switches): You must use the cross wire.
