CCNA Cisco Certified Network Associate Study Guide - FTP Server

40 Chapter 1 � Internetworking
FIGURE 1.17 UTP wire with an RJ-45 connector attached
Pin
1
2
3
4
5
6
7
8
Different types of wiring are used when building internetworks. You will
need to use either a straight-through or crossover cable.
Straight-Through
Wire Pair
(T Is Tip;
R Is Ring)
Pair 2 T2
Pair 2 R2
Pair 3 T3
Pair 1 R1
Pair 1 T1
Pair 3 R3
Pair 4 T4
Pair 4 R4
In a UTP implementation of a straight-through cable, the wires on both cable
ends are in the same order. Figure 1.18 shows the pinouts of the straightthrough
cable.
FIGURE 1.18 UTP straight-through pinouts
Pin
1
2
3
4
5
6
7
8
Label
RD+
RD–
TD+
NC
NC
TD–
NC
NC
8
1
RJ-45 connector
Hub/Switch Server/Router
Pin
1
2
3
4
5
6
7
8
Label
TD+
TD–
RD+
NC
NC
RD–
NC
NC