1
2
3
4
5
6
7
8
TX+
TX–
RX+
RX–
RX+
RX–
TX+
TX–
1
2
3
4
5
6
7
8
NIC
HUB
STRAIGHT-THROUGH
1
2
3
4
5
6
7
8
TX+
TX–
RX+
RX–
RX+
RX–
TX+
TX–
1
2
3
4
5
6
7
8
NIC
HUB
CROSSOVER
F I G U R E A
-
2
S T R A I G H T
-
T H R O U G H A N D C R O S S O V E R P I N A S S I G N M E N T S
A – 4