Ethernet Cable
Types of Ethernet Cables
Ethernet cables include straight-through cables and crossover cables.
Structure
Straight-through cables and crossover cables are standard unshielded Ethernet cables with RJ45 connectors, as shown in Figure 7-16.
Pin Assignments
Table 7-4 lists pin assignments of a straight-through cable.
Connector X1 |
Connector X2 |
Color |
Relationship |
|---|---|---|---|
X1.2 |
X2.2 |
Orange |
Twisted pair |
X1.1 |
X2.1 |
White/Orange |
|
X1.6 |
X2.6 |
Green |
Twisted pair |
X1.3 |
X2.3 |
White/Green |
|
X1.4 |
X2.4 |
Blue |
Twisted pair |
X1.5 |
X2.5 |
White/Blue |
|
X1.8 |
X2.8 |
Brown |
Twisted pair |
X1.7 |
X2.7 |
White/Brown |
Table 7-5 lists pin assignments of a crossover cable.
Connection
A straight-through cable connects Ethernet ports between the following devices:
A router and a hub
A router and an Ethernet switch
A computer and an Ethernet switch
A computer and a hub
A crossover cable connects Ethernet ports between the following devices:
Two routers
A router and a computer
Two hubs
A hub and a switch
Two switches
Two computers
