Basic concepts of computer network (5) basic principles of local area network

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One ： The main LAN technology

• Ethernet
• Token ring network
• FDDI Ring Creative Center network

Two ： Ethernet technology development history

• 1973 year , Xerox The company puts forward Ethernet technology and realizes
• 1980 year , Digital Equipment Corporation ,Intel,Xerox, The three jointly launched 10Mbps DIX Ethernet standard
• 1995 year ,IEEE It was officially approved 802.3u Fast Ethernet standard
• 1998 year ,IEEE802.3z Gigabit Ethernet standard officially released
• 1999 year , Release IEEE802.3ab standard , namely 1000BASE-T standard
• 2002 year 7 month 18 Japan ,IEEE Passed 802.3ae, Also known as 10 Gigabit Ethernet
• 2004 year 3 month ,IEEE Approval of copper cables 10G Ethernet standard 802.3ak

3、 ... and ： Ethernet technology standard

According to the standard of Ethernet transmission and transmission rate , The transmission media is divided into twisted pair cables 、 Multimode fiber and single mode fiber ;

The transmission rate is divided into 10Mbps、100Mbps、1Gbps and 10Gbps etc. .

Four ： Ethernet interface and cable

4.1： Interface ：

• RH-45 The connector
• Fiber optic connector

4.2： Cable

4.2.1： Copper medium ：

① Coaxial cable

② Twisted pair （ Shielded twisted pair 、 Unshielded twisted pair ）

• 568A： Green and white 、 green 、 Orange white 、 blue 、 Bluish white 、 orange 、 Brown and white 、 Brown
• 568B： Orange white 、 orange 、 Green and white 、 blue 、 Bluish white 、 green 、 Brown and white 、 Brown

5、 ... and ： Ethernet devices and topologies

 

6、 ... and ： Optical fiber and its interface type

 

7、 ... and ：WLAN The basic principle