© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-1
Chanpter 4线缆及设备互连
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-2
10Base5 100BaseTX10BaseT 100BaseFX
Media
Maximum Segment Length
Topology
Connector
50-ohm coax (thick)
500 meters
Bus
100 meters
Star Star Point-to-Point
EIA/TIA Cat3, 4, 5 UTP
2 pair
EIA/TIA Cat5 UTP2 pair
62.5/125 micron multi-
mode fiber
AUI ISO 8877 (RJ-45)
Duplex media-interface connector (MIC) ST
ISO 8877 (RJ-45)
400 meters100 meters
常用局域网连接线缆类型
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-3
常用以太网接口AUI connectors
are DB15
ISO 8877 (RJ-45) connectors and jacks
are slightly larger than RJ-11 phone
connectors and jacks
Fiber Connector Port
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-4
UTP Device
The RJ-45 Connector
1
8
8 Pair 4 R4
1234567
Wire PairT is TipR is Ring
Pair 2 T2Pair 2 R2Pair 3 T3Pair 1 R1Pair 1 T1Pair 3 R3Pair 4 T4
Pin
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-5
双绞线( 10BASET )非屏蔽的双绞线( UTP )屏蔽的双绞线( STP ) 100M RJ45
实验 A :制作网线!
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-6
颜色标准 T568B 白橙 橙 白绿 兰 白兰 绿 白棕 棕
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-7
学习和制作常见的三种线缆
三种常见线缆的名称和适用场合 。EIA/TIA 568 A 和 B 标准端接方法。如何制作常见的三种线缆。
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-8
常见的三种线缆
S/ T (直通线): H--S , R--S
C/O (交叉线): H--H , R--R , S--S , H--R
R/O (反接线): H connect to R & S Devices
识别三种常见线缆 头子
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-9
常见的三种线缆名称及适用场合
S/ T (直通线): H--S , R--S
C/O (交叉线): H--H , R--R , S--S , H--R
R/O (反接线): H connect to R & S Devices
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-10
EIA/TIA 568 A 线路排序1-------------------- 绿白2-------------------- 绿3-------------------- 橙白4-------------------- 蓝5------------------- 蓝白6------------------- 橙7------------------- 棕白8------------------- 棕
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-11
EIA/TIA 568 B 线路排序1-------------------- 橙白2-------------------- 橙3-------------------- 绿白4-------------------- 蓝5------------------- 蓝白6------------------- 绿7------------------- 棕白8------------------- 棕
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-12
S/T ( 直通线制作方法)在 EIA/TIA 568A 或 B 标准端接时左右排序一致橙白 -------------------- 橙白橙 --------------------- 橙绿白 -------------------- 绿白蓝 --------------------- 蓝蓝白 ---------------------- 蓝白绿 ----------------------- 绿棕白 -------------------- 棕白棕 --------------------- 棕
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-13
C/O ( 交叉线) 制作方法端接 A 标准 -----B 标准1 绿白 -------------------- 橙白2 绿 -------------------- 橙3 橙白 -------------------- 绿白4 蓝 -------------------- 蓝5 蓝白 ------------------- 蓝白6 橙 ------------------- 绿7 棕白 ------------------- 棕白8 棕 ------------------- 棕
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-14
R/O ( 反接线) 制作方法无论 A 标准还是 B 标准都要全反:1 --------------------82 ---------------------73 ---------------------64 ---------------------55 ---------------------46 ---------------------37 ---------------------28 ---------------------1
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-15
网络的基本连接组件电缆,网络适配器和计算机与网络其余部分连接起来的无线设备。电缆(双绞线,同轴电缆线,光纤,无线通信设备)
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-16
同轴电缆
细缆( 10BASE2 ) 185M , BNC 头, T 头,终结器粗缆( 10BASE5 ) 500M , AUI 头
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-17
光纤
优点:极高速,大容量数据传输(信号传输非常快,并只有非常小的干扰)缺点:造价较贵,安装较因难(如果在安装时不小心的话,容易折断)
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-18
无线通信设备(无线局域网)红外线传输(在传输设备和接收设备之间必须有一条清晰的视线,任何阻碍红外线信号的物体将阻碍通信。这些系统必须产生非常强的信号,因为弱的信号将被怀疑为光源的干扰。)窄带无线电传输(使用无线电波,窄带无线电不需要视线对焦,但窄带无线电传输要受到钢铁和负载方向墙壁的干扰。)
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-19
Straight-through (直通线)
Wires on cable ends are in same order
Pin Label1 RD+2 RD-3 TD+4 NC5 NC6 TD-7 NC8 NC
Cable 10BaseT/100BaseT Straight-
through
Pin Label1 TD+2 TD-3 RD+4 NC5 NC6 RD-7 NC8 NC
Server/Router 18
Straight-through Cable
81Hub/Switch
8 1
wo
owb
wg
bgbr wbr
8 1
wo
owb
wg
bgbr wbr
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-20
Straight-through (直通线)
switch to router
switch to PC or server
hub to PC or server
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-21
Crossover (交叉线)
Some wires on cable ends are crossed
8 1
wo
owb
wg
bgbr wbr
Cable 10BaseT/100BaseT Crossover
Pin Label1 RD+2 RD-3 TD+4 NC5 NC6 TD-7 NC8 NC
Pin Label1 RD+2 RD-3 TD+4 NC5 NC6 TD-7 NC8 NC
Crossover Cable
18 1
88 1
wg
gwb
wo
b obr wbr
Hub/Switch Hub/Switch
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-22
Crossover (交叉线)
Switch to switch PC to PC switch to hub hub to hub router to router
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-23
UTP Straight-through versus Crossover
Use a crossover cable when BOTH ports are designated with an x or neither port is designated with an x.
Use straight-through when only one port is designated with an X.
1x 2x 3x 4x
1x 2x 3x 4x 1x 2x 3x 4x
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-24
Router connections
Network connections at the CSU/DSUEIA/TIA-232 EIA/TIA-449 EIA-530V.35 X.21
CSU/DSU
End user device
DTE
DCE
Service provider
串口连接类型
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-25
Data Terminal EquipmentEnd of the user’s deviceon the WAN link
Data Communications Equipment• End of the WAN provider’s
side of the communication facility• DCE 负责提供时钟频率
DCEDTE
ModemCSU/DSU
S S
SSS S
DTE DTEDCE DCE
DTE 与 DCE
DTE/DCE—The point where responsibility passes
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-26
2500 Router—rear view
Serial WAN ports can be fixed
固定接口设备
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-27
Console
1603 Router—rear view
Ethernet AUIEthernet 10BaseT ISDN BRI S/T
Serial WAN ports can be modular
3640 Router—rear view
模块化接口设备
Module
WAN Interface
Card
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-28
Cabling Routers for ISDN Connections
Determine if you need a BRI S/T or U Interface• Routers have one or both types of ports
Note port Label
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-29
Cabling Routers for ISDN Connections (cont.)
!!!WARNING!!!Do not connect a cable into an ISDN port unless it is
from an ISDN switch or ISDN wall jack.If you connect a cable from any other device into the
BRI port, you will ruin the non-ISDN device.
Cisco Router
ISDN BRI port
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-30
• PCs require an RJ-45 to DB-9 or RJ-45 to DB-25 adapter• COM port settings are 9600 bps, 8 data bits, no parity,
1 stop bit, no flow control• This provides out-of-band console access• AUX switch port may be used for modem-connected
console
Console 连接的设置Device with console
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-31
超级终端
Console PortCommunications
Port (COM)
Cisco device
Windows ‘95 PC withHyperTerminal terminal
emulation software
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-32
创建超级终端会话Step 1: 验证线缆(全反线, DB9 )
Step 2: 开机Step 3: 打开 HyperTerminal 文件夹Step 4: 打开 HyperTerminal
Step 5: 命名
Step 3 and 4
Step 5
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-33
创建超级终端会话Step 6: Select COM 端口 Step 7: 设置属性
© 1999, Cisco Systems, Inc. www.cisco.com ICND—3-34
创建超级终端会话Connect Disconnect
Step 8: 启动超级终端
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