1.LAN의 특징과 각종 방식

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2 Chapter 1. LAN I. LAN Switching - 2. LAN - (Topology) - (Cable) ) / LAN - - (point to point) 2) LAN - 3) LAN ) Bound - - (Twisted Pair) - (Coaxial cable) - (Fiber Optics) 1

3 2)Unbound - LAN - LAN - LAN - - (Flexibility) (Installabilty) -,, CSMA/CD 1) idle idle, busy ===> 1 collision collision station, -TOKEN PASSING 1) Token passing station station station 2)Token ring station ring 2

4 2.4 3)Token bus virtual ring virtual ring station station BASE -T Mbps, BASE ( ), TTwisted Pair -, - 3

5 Twisted Pair Cable Category 1 : Category 2 : ~ 1MHz 100m Category 3 : ~ 16MHz 100m Category 4 : ~ 20MHz 100m Category 5 : ~ 100MHz 100m 4

6 2.4.2 (Coaxial cable), 10 BASE Mbps, BASE, 200M -, -, (Coaxial cable), 10 BASE Mbps, BASE, 500M - - (Cylinder). ( ). (, CATV ). LAN Ethernet RG-58. RG-58 Cable Impedance50 RG Radio Frequency Guide (Mil-spec) LAN RG-58 RG-58A/U, RG-58C/U. Baseband( ) RG-58. 5

7 (2 ) (Optical Fiber Cable),.,.,,. (Core), (Clad) (Coating). 6

8 SI GI 7

9 2.5 LAN 1. Twisted-Pair 1. Star Type 1. CDMA/CD 1. BaseBand 2. Coaxial 2. Bus Type 2. Token-Passing 2. Broadband - Thin 3. Ring Type - Thick 3. Fiber-Optic 8

10 II. LAN SYSTEM 1. Node(Server Workstation) LAN. LAN LAN Server, Server Data Workstation. 1.1 Server Workstation, Network (Application) (Data Base). Network Server, Application Server, File Server, DB Server, Server (Workstation ). 1.2 Workstation 9

11 2. ( Cable System ) LANNode. 3. NIU ( Network Interface Unit ) 4. NOS (Network Operating System ) LAN. OS(Operating System) Network Network Operating System, NOS. NOS Novell NetWare Microsoft Windows NT, LAN Manager, IBM OS/2 Network Manager. 10

12 III. LAN System 1. Inter Networking,

13 1.1 Repeater 1.2 Bridge 12

14 1.2.3 Switch PC Dedicated 10Mbps 13

15 Router Router

16 Router 1.4 Gateway 15

17 Gateway Router 16

18 2. Ethernet 2.1 Switching Hub 10Mbps Bus = 10 Mbps = 10 Mbps 3 10Mbps Path * = 10 Mbps = 30 Mbps * 2.2 Switching Store-and-Forward Cut-through Packet Packet Filtering Packet - Ethernet - FDDI - Ethernet - Ethernet - Ethernet - 10Base-T - FDDI - FDDI - Ethernet - 100VG-AnyLAN - 100Base-T - 100Base-T - Ethernet - ATM - 100VG-AnyLAN - 100VG-AnyLAN - ATM - ATM 17

19 Switching Hub 2.2.2

20 2.3 Switch Hub * Frame (Drop) Switch Hub * (Latency time) ==> * Cut-through Store-and-forward ==> Cut-through * Switched Port * Switching Client(Demand) Switch Hub 1 Server (Resource). * DemandResource1:1 ( Server Multiple Line ) * RMON (Remote Monitoring) - * "Back pressure" Flow control mechanism Switch Hub Mbps (1) 100Base-T 100VG-AnyLAN FDDI 10Base-T Packet Vendor 10 Base-T Pin CSMA/CD Access Vendor 10Base-T (SMT) 25p Cable BackBone Network Video Fault-tolerance Desktop Application 19

21 Mbps (2) 100Base-T 100VG-AnyLAN FDDI Protocol IEEE802.3u IEEE ANSI X3T9.5 Access Method CSMA/CD Demand Priority Timed token rotation Frame 802.3(Ethernet) 802.3(Ethernet) 802.5(Token Ring) CAT 3 UTP YES YES NO CAT 4 UTP YES YES NO CAT 5 UTP YES YES YES Type 1 STP YES YES YES Optical Fiber YES YES YES (M) CAT 3 UTP * CAT 4 UTP * CAT 5 UTP (CDI) Type 1 STP Optical Fiber 400 2,000 2,000 Coaxial * * * Full Duplex * * * packet Size 1,500 1,500 or 4,500 4,500 20

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LAN케이블링

LAN케이블링 LAN Page1 1. Defacto De Jure (De jure ), (De Facto ),. (De Jure) : ISO ITU.,. ISO ITU KS, KICS, TTA. (De Facto) :. MS, IPX, IBM SNA. (Forum) :.. IETF, W3C, ATM ATM. Page2 2. American National Standards