͢¤٧ Gigabit Ethernet
ѨغѹҷԵШѹҡء ԭԺͧҧͧ ѧѭ͡ ҧ ͧͧҧ ʹ ѷ ʶҹ֡ǹ˭80% Ethernet ǹǡ FDDI/CDDI, ATM ͧҹҧǴҴӹǹ ͧ ʹԺͧ Internet ҧǴ ֧ Ethernet Ẻҹ 10 Mbps öͺʹͧͧͧҧԷҾ
Gigabit Ethernet (IEEE802.3z)ҵðҹͧͧ (LAN-Local Area-Network) Ѳҡ Ẻ Ethernet Ẻ 10 Mbps öѺдѺ 1 Gbps ѧ CSMS/CD ͹Ethernet Ẻ ҡѲѴŧöͧѺдѺ 1 Gbps
Gigabit Ethernet ǹҡ 10 Mbps 100 Mbps Ethernet (ҵҹ IEEE 802.3 IEEE802.3u ӴѺ) ѹѧѹѺҵҹҧ100% Gigabit Ethernet ѧʹѺʹعӧҹ mode full-duplex ӧҹҧ Switch Ѻ Switch ҧ Switch Ѻ End Station ǹҹ Repeater, Hub ѡɳͧShared-media ( CSMA/CD) Gigabit Ethernet ӧҹ mode Half-duplex öѭҳͧᴧʧ

ٻ 1 ʴǹСͺҧͧ Gigabit Ethernet Fiber Channel

ѡҹ

ѡҹӤѭͧ Gigabit Ethernet (IEEE802.3z) Ѻǹͧ MAC Layer (Media Access Control Layer) ¡ Carrier Extension ͧҴ 512 亵 ѧǹͧҴѺ 512 亵 ˵ͧͧҡ Ethernet Ẻá 10Mbps (IEEE802.3) ˹ͧ͡ö ǨѺ (detect) ͧ (Collision) ͧҧѹ 2 64 亵͡ѧԴѹͧ (Roundtrip Propagation Delay) Դѹ MAC Layer Ǩѹѭҳͧѹش ͹ա 100 Mbps (IEEE802.3u)˹ ҡѭҳԡ 10 ҡͧ ͧŴŧ 10 ҧ٧شҧͧŴŧ 10 ѹ ҡ 2 § 200 ա 10 Gigabit Ethernet ֧ҧѧŴŧ§ 20 UTP cat5 öҹҾӧҹԧ ѧ Carrier Extension ͧöѺѹͧͧҧѹ 200
Ҵͧشͧ Gigabit Ethernet Ѻ 512 亵öǨѺѹͧѺ 1 Gbps ҧ٧ش 200 ҧӧҹ˹ҵðҹ IEEE802.3z Ŵӹǹ repeater hop ŧҡ 100Base-T(IEEE802.3u) ͹حҵ 2 hop ( 4 hop 10Base-T) ŧ§ 1 hop ˵ؼͧŴǨͺѹͧ ͡ҡҧǡ(ҧ俿) IEEE802.3z Safety Factor աѧԵçѹԧ Դѭ ػó Gigabit Ethernet ͧҧԵѹ

Carrier Extension Ѻ Throughput

ͧҴͧ 512 亵ǹҴѺ 512 亵 Throughput ŴŧҴ 512 亵ӹǹҡ óشҴ 64 亵ͧѹ 1 Gbps throughput ҳ 12% 120 Mbps ͧ
ҹԧӹdz Throughput ҡ Ҵͧҹ ҡʶԵ͡ ǹҡѧǧ 200-500 亵 throughput ҳ 300-400 Mbps §ͧͧҧ
͹Ը Carrier ExtensionóѺẺ Half-Duplex ѺẺ Fulle-Duplex Ѻ ¡ѹش֧ѹͧǹҧѹ(Collision) ֧ͧѧѺǨѺѹ

Ԥ Packet Bursting

Packet Bursting ԤŴͧ Carrier Extension ԤӧҹǺ Ҵ 512 亵ѹҴҡ 512 亵 ֧͡ ҧͧӧҹѹҧ Gigabit Interface Card ѨغѹͧѺöѴѺwbr>wb ѡɳǺҴͧͧ͡wbr>wbrr>>wbrr>r>>wbr>br>r>rb<wbr>wbr>r>rbr>>> Դ ͺѺ (Acknowledge) ѭѧҧѴԹҧ Ҩ˹ҷͧ Protocol ˹ҷѭǹ Ҩ Packet Bursting ˹ǺҴ 512 亵 Թ˹ѧöǺҡ 512 亵 ͡Ը Carrier Extension

Buffer Distributor

Buffer Distributor ػóͧ Gigabit Ethernet öԷҾͧкŴӡѴͧ Carrier Extension ػóӧҹسѡɳͧ Repeater Switch ѹ ػóẺ Full-Duplex Flow Control(IEEE802.3x) ѹöӧҹ͹ѺRepeater ء packet ѧءPort öӧҹѡɳͧ SwitchѺҡPort ѹ˹(Buffer) ¹ŧҧػó Flow Control ѭҳ˹ش Buffer ҧŧա (ѧҡػóBuffer ѧҧº) Ըö Throughput ͺ 100% ӡѴͧԸء˹ѺػóͧFull-Duplex ʹѺʹعҵҹ IEEE 802.3x

ѭҳ

Ѩغѹҧ˹ҵҹ IEEE802.3z ˹ö UTP cat5ѺͧѺдѺ 1 Gbps ѧԵѳͧҴ(Եѳ͡͹Сҵҹ)UTP cat5 ѭҳ͡ʧ(Optic Fiber) Ẻ Multi-mode Ҵ 62.5 micron ʧ 780 nanometer ҳ 550 Ẻ Single-mode ʧ 1300 nanometer ҡ 2 ҺѹʧԴ٧ͧҡwbr>wbr>wbrr>br>>, ػóͧ ʹԴ اѡ ҧӧҹѺҵҹ IEEE 802.3zʹͧᴧҹԹ 30 ѭԴѺͧᴧԴ Echo ѭҳ俿ҹҡͧᴧѧѵҧҹͧѭҳ RJ45 ԴEcho Ethernet Ẻ 10 100 Mbps ѧҡºѺѺ 1 Gbps

¹ Gigabit Ethernet

ҧӧҹͧ IEEE802.3z ʹػó Gigabit Ethernet ػóҧѺ 5 ͹ѧ
1. ͧ Switch-to-Server LinkԸشѺҧ Gigabit switch Ѻ ServerԷҾ٧Դ Gigabit interface card ٻ 2.1 2.2 ʴ¹ŧҡػóẺ Ethernet/Fast Ethernet Gigabit Ethernet


ٻ 2.1 ʴ͹¹ػó Gigabit Ethernet

ٻ 2.2 ʴѧ¹ػó Gigabit Ethernet

2. ѡ Fast Ethernet ͹Ҵ֧Ҵҧ Fast Ethernet Switch ػóѡ(Backbone Switch) ҨͧѺͧѺҳҧǴ Gigabit Ethernet Switch ˹ҷBackbone Switch ᷹ö Bandwidth ҧ§ͧѨغѹ͹Ҥ ٻ 3.1 3.2 ʴ¹ŧҡػóẺ Ethernet/Fast Ethernet Gigabit Ethernet


ٻ 3.1 ʴ͹¹ػó Gigabit Ethernet


ٻ 3.2 ʴѧ¹ػó Gigabit Ethernet

3. ͧ Switch-to-Switch Link Ҵ˭ Ethernet/Fast Ethernet switch/repeater ҳͧҹҧSwitch/Repeater Server ٧ҡͧ Gigabit Ethernet Ethernet/Fast Ethernet Switch/Repeater öԷҾͧк ٻ 4.1 4.2 ʴ¹ŧҡػóẺ Ethernet/Fast Ethernet Gigabit Ethernet


ٻ 4.1 ʴ͹¹ػó Gigabit Ethernet


ٻ 4.2 ʴѧ¹ػó Gigabit Ethernet

4. ѡ Shared FDDI ͹෤ FDDI ö¹ Gigabit Ethernet Gigabit Ethernet Switch/Repeater FDDI Concentrator Ҩ§ Gigabit Ethernet Interface Card ¹Ѻ FDDI Interface Card Router ҹ ¹ŧͧŧعѺͧѭҳ ͧҡ FDDI ǹҡ ʧҹ ٻ 5.1 5.2 ʴ¹ŧҡػóẺ Ethernet/Fast Ethernet Gigabit Ethernet


ٻ 5.1 ʴ͹¹ػó Gigabit Ethernet


ٻ 5.2 ʴ͹¹ػó Gigabit Ethernet͡ԧ

5. Network Interface Card ͧ High-end Desktop Ѻاͧкشҧ ػó Gigabit Ethernet Switch/Repeater Ѻͧ Desktop дѺ Hi-end Դ Gigabit Ethernet Interface Card ͧѺҳ٧ҡ (VDO-Editing, VOD) ҹ Data Ware House

Gigabit Ethernet Ѻ ATM

дѺ 1 Gbps Ҥ port ͧ Gigabit Ethernet ١ ෤ ATM ͹ Gigabit Ethernet Ҩ ATM ͹Ҥ ԧҹҧҹͧ͡ ͡ҹҧѹ͡ ѹҧ͡ Gigabit Ethernet ͡شʧѡѹѺEthernet ͹ѹҧѨغѹ çѹ͡Ѻͧ ෤ ATM öʹѺʹع EthernetҤ port Gigabit Ethernet ǹͧ ATM ѹ͡Ҵͧͧ(¡ Cell)ҴѭͧThroughput ҧ Gigabit Ethernetѧҧ ͡ҡ෤ ATMͧ͡ѺѺԧ(non-Real-time Real-time Data)

سҾͧԡ (Quality of Service, QoS)

QoS дѺԡѹѺСѹѵ˹Ѻwbr>wbr<wbr>>wr>br<١˹(Dedicated bandwidth) öԡ ෤ ATM QoS Ѻ Real-time Data Gigabit Ethernet öͧѺѺԧ (Real-time data) ʹѺʹعQoS ӧҹͧ IEEE802.3z ֧ͧ RSVP (Resource Reservation Protocol) Gigabit öͧѺ QoS ѧСҵҹ͡ .
ػ
ѨغѹҵҹGigabit Ethernet (IEEE802.3z)ѧҧԨóСҧҧ ҨѺا´ͧҧա ֧ѺԹѴػó Gigabit Ethernet ͧҴͧ˵ؼҧҹѹѺػóѹͧҧԵҨwbr>wb<wbr>r>r>wb<<wbr>wbrr>>r>br>wbr>b<<<wbr>wbr>br>wbrbr>wbr Gigabit Ethernet ö෤ ATM ѧ Gigabit Ethernet ª٧شԷҾѺͧ Ethernet ѧҧ