I / 6 1 1. HDLC I / 6 2
(1) CCITT X.25 (HDLC/LAPB) SDLC (Synchronous Data Link Control protocol) HDLC High-speed Data Link Control protocol ITU-T/ISO ADCCP Advanced Data Communication Control Protocol ANSI ( ) LAPB Link Access Procedure B CCITT X.25, HDLC I / 6 3 (2) ISDN X.21 bit-oriented bit-stuffing connection-oriented I / 6 4
X.25 Network Model DTE PSN DCE DTE DCE PSE DTE: Data Terminal Equipment DCE: Data Circuit terminating Equipment PSE: Packet Switch Exchange PSN: Packet Switch Network DCE DTE I / 6 5 HDLC frame (1) Address: Control: Data: Checksum: CRC-CCITT 8 8 8 >= 0 16 8 01111110 address Control Data Checksum 01111110 I / 6 6
HDLC frame (2) b1 b2 b3 b4 b5 b6 b7 b8 0 N(S) P/F N(R) 1 0 S P/F N(R) 1 1 M P/F N(R) N(S): N(R): P/F: / S: M: I / 6 7 HDLC frame (3) / (poll bit) (final bit) N(S) if N(R) =k: (k-1) I / 6 8
HDLC frame (4) S RR REJ N(R) N(R) RNR Go-back-N N(R) N(R) SREJ N(R) RR Selective-Repeat N(R) I / 6 9 HDLC frame (4) A SNRM(B),P (data transmission)... DISC(B),P B UA(B),F UA(B),F I / 6 10
2. ATM I / 6 11 ATM ATM: Asynchronous Transfer Mode 53octet (cell) cut-through VP (Virtual Path) VC (Virtual Circuit) ATM Adaptation Layer (AAL) I / 6 12
VP & VC VP: node/node VPI VC: node/node VCI I / 6 13 ATM Network Model Logical topology /VC IEEE802.1q Tag VLAN I / 6 14
ATM sub-layers I/F Signaling ATM Adaptation Layer (AAL) ATM Layer Data Transmission VC/VP based switch routing Physical Layer I / 6 15 ATM SONET (Synchronous Optical Network) OC (Optical Carrier level) OC-3 155.52Mbps OC-12 622.08Mbps OC-24 1244.16Mbps OC-48 2488.32Mbps OC-192 10Gbps OC-3 OC-12, OC-48, OC-192 I / 6 16
ATM Adaptation Layer (AAL) ATM AAL1 AAL2 MPEG2 AAL3/4 AAL5 ATM Forum ATM AAL5 I / 6 17 ATM PVC (Permanent Virtual Circuit) VC SVC (Switched Virtual Circuit) VC LAN Emulation I / 6 18
ATM PVC VC PVP VC I / 6 19 ATM NTT MegaLink ATM ATM VC Single Mode Fiber (traffic shaper) I / 6 20
3. LAN I / 6 21 Ethernet (10, 100, G) CSMA/CD FDDI Token Ring ATM VC (Virtual Circuit) VP (Virtual Path) POS 2 PPP Over SONET I / 6 22
LAN (Media Access Control) (controlled) TDMA (Time Division Multiple Access) Token Passing (contention) ALOHA, CSMA, CSMA/CD... I / 6 23 TDMA (1) Time Division Multiple Access T N 1.5Mbps 64Kbps I / 6 24
TDMA (2) frame (N=8) terminal B terminal A I / 6 25 TDMA (3) I / 6 26
TDMA ATM TDMA TDMA TDMA LAN ATM LAN TDMA I / 6 27 Pure ALOHA (1) ALOHA System uplink downlink RTT (Round Trip Time) ACK [0,K] : r r I / 6 28
Pure ALOHA (2) K I / 6 29 slotted ALOHA pure ALOHA I / 6 30
CSMA Carrier Sense Multiple Access RTT/2 I / 6 31 CSMA 1-persistent CSMA p-persisitent CSMA nonpersistent CSMA I / 6 32
CSMA/CD CSMA with Collision Detection Ethernet binary backoff backoff timer I / 6 33 Token Passing 802.4 (Token Bus), 802.5 (Token Ring) FDDI Token Passing (token) token holding timer I / 6 34
Pure ALOHA Slotted ALOHA CSMA CSMA/CD (Ethernet) Token Ring FDDI TDMA ATM I / 6 35 1-persistent CSMA/CD (Ethernet) Token Ring CSMA/CD Token Ring I / 6 36
4. Ethernet (IEEE802.3 family) I / 6 37 Ethernet CSMA/CD LAN IEEE802.3 10Mbps, 1500octet MTU LAN 10Base5, 10Base2 UTP 10BaseT I / 6 38
Fast Ethernet 100Mbps Ethernet UTP/CAT5 10Mbps Ethernet Bidirectional 100BaseT Auto-sense / Auto-negotiation 1 0BaseT/100BaseT, Unidirectional / Bidirectional I / 6 39 Gigabit Ethernet (IEEE802.3z) 1Gbps 1Gbps 1000Base-SX ( ), 1000Base-LX ( ) IEEE802.3z NIC I / 6 40
Gigabit Ethernet (IEEE802.3ab) Gigabit Ethernet 1000Base-T I / 6 41 Ethernet Ethernet Fast Ethernet Gigabit Ethernet Data Rate 10Mbps 100Mbps 1Gbps CAT 5 UTP 100m 100m 100m (CAT5+/6) STP/Coax 500m 100m N/A Multi-mode Fiber 2Km 412m (hd*) 2Km (fd*) 550m Single-mode Fiber 25Km 20Km > 5Km *IEEE half duplex/full duplex ) IEEE 802.3z I / 6 42
Ethernet Family Fast Ethernet 10BaseT 10BaseT ATM I / 6 43 10Gbps Ethernet IEEE802.3ae Ethernet 10Gbps Ethernet 10GBASE-LR (1310nm) 10GBASE-EX4(1550nm WWDM 10Km 50Km I / 6 44
I / 6 45 xdsl ADSL: Asymmetric Digital Subscriber Line 3Mbps, 8Mbps, 12Mbps VDSL: Very high bit rate Digital Subscriber Line 2 25Mbps 50Mbps SDSL: Symmetric Digital Subscriber Line HDSL: High bit rate Digital Subscriber Line I / 6 46
xdsl DSLAM aggregator CPE I / 6 47 Peripheral Bus HIPPI (800Mbps/32bit, 1.6Gbps/64bit) FibreChannel (FC) (266Mbps, ) Myrinet ( max 4Gbps) SCI (6.4Gbps and higher) IEEE1394 ( 100Mbps 400Mbps) E I/F Opt I/F Ethernet family I / 6 48
WDM Wave-Division Multiplex ( ) ( ) SONET OC-48 8 LAN WDM Nbase CIENA I / 6 49 D-WDM: Dense Wavelength Division Multiplexing 16 32 64 OC48(2.4G), OC192(9.6G).100G I / 6 50
IEEE802.11 Wireless Ethernet 802.11a: 54Mbps / 5.7GHz 802.11b: 11Mbps / 2.4GHz 802.11g: 50Mbps / 2.4GHz SS WiFi I / 6 51