文档介绍：会计学
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千兆以太网组网
以太网 Ethernet 1976 Xerox Palo Alto Research Center
1980年，DEC、Intel 和 Xerox提出以太网协议标准。
以太网的设计目标(The original Ethernet goals) ：
简单(Simplicity)
价格低(Low cost)
兼容性(Compatibility)
寻址灵活(Addressing flexibility)
公平性(Fairness)
先进性(Progress)
高速(High speed)
低时延(Low delay)
稳定性(Stability)
可维护性(Maintainability)
层次结构(Layer architecture)
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以太网的(The Ethernet Non-goals)
全双工(Full-duplex)
差错控制(Error Control)
安全性(Security)
速率灵活性(Speed Flexibility)
优先级(Priority)
不设防(Hostile User )
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以太网的发展进程(The Development of Ethernet)
10BASE5
10BASE2
10BROAD36 10Mbps,broadband,3600mCATV cable
10BASE-T 10Mbps,baseband,over two twisted-pair cable
100BASE-T4
100BASE-FX
1000BASE-CX
1000BASE-LX 1000Mbps,long wavelength over optical fiber
1000BASE-SX 1000Mbps,short wavelength over optical fiber
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LLC -- Logical Link Control
MAC Control ( optional )
MAC -Media Access Control
Reconciliation
GMII
PCS
PMA
PMD
MDI
Medium
Media Dependent
PHY Group
Data Link
Medium Dependent
Interface
IEEE 以太网参考模式
Reconciliation
MII
PLS
PMA
MDI
Medium
Reconciliation
AUI
PMA
MDI
Medium
AUI
1 - 10 Mbps
10 Mbps
100- 1000Mbps
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Gigabit Ethernet -RM
MAC Client Sublayer- LLC,Bridger entity
MAC Control ( optional )
MAC -Media Access Control
Reconciliation
GMII
PCS
PMA
PMD
MDI
Medium
Media Dependent
PHY Group
Physical Coding Sublayer
Physical Medium Attachment Sub.
Physical Medium Dependent Sub.
Mdium Independent Interface
Data Link
Medium Dependent Interface
千兆以太参考模式
协调一致
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1000 Base-X Gigabit Ethernet -RM
MAC Client Sublayer- LLC,Bridger entity
MAC Control ( optional )
MAC -Media Access Control
Reconciliation
GMII
PCS
PMA
SX-PMD
SX-MDI
1000 Base-X PHY
Mdium Independent Interface
Data Link
Medium Dependent Interface
协调一致
LX-PMD
LX-MDI
CX-PMD
CX-MDI
LX 光纤
SX 光纤
150 平衡铜缆
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IEEE 1980
IEEE - 1995
IEEE &