Agenda 1. QUIZ 2. HOMEWORK 3. LOCAL AREA NETWORKS 4. WIDE AREA NETWORKS

Homework 12-1, 12-4, 12-11, 12-16, 12-18, 12-20, , 13-12, 13-13, 13-16

Chapter 12 Local Area Networks

Figure 12-1 LAN Compared with the OSI Model

Figure 12-2 Project 802

LANs & Layers Source Port Bridging Logical Link Control CSMA Token Token MAN IVD Wire- Future less CD Bus Ring Broadband Tag Fiber Optic Tag Data Link Layer Physical Layer

Point To Multipoint Protocol Building Blocks ALOHA--Up to 18% Throughput Slotted ALOHA--Up to 37% Throughput Carrier Sense Multiple Access-- Up to 55% Throughput Carrier Sense Multiple Access with Collision Detection % Throughput Ethernet

Figure 12-3 PDU Format

Figure 12-4 Control Field in a PDU

Figure 12-5 IEEE 802.3

Figure 12-6 Collision in CSMA/CD

Figure MAC Frame

Figure 12-8 Ethernet Segments

Figure 12-9 Topology of 10Base5

Figure Transceiver Connection in 10Base5

Figure Topology of 10Base2

Figure Base-T Topology

Figure An Ethernet Network Using A Hub

Figure An Ethernet Network Using a Switch

Figure Categories of Fast Ethernet Implementations

Figure Base-TX Implementation

Figure Base-FX Implementation

Figure Base-T4 Implementation

Figure Use of Gigabit Ethernet

Table 12-1 Gigabit Ethernet Implementations Feature 1000Base-SX1000Base-LX1000Base-CX1000BAseT MediumOptical FiberOptical FiberSTPUTP multi-modemulti or single SignalShort-waveLong-waveElectricalElectricallaser Max550 m550 m m-mode25 m25 m 5000 m s-mode

Figure Token Passing

Figure Token Ring Frame

Figure Token Ring

Figure Token Ring Switch

Figure FDDI Operation

Figure FDDI Layers

Figure FDDI Frame Types

Figure FDDI Ring

Figure FDDI Ring after a Failure

Figure Node Connections

Chapter 13 Metropolitan Area Networks & IP to TCP

Figure 13-1 DQDB Buses and Nodes

Figure 13-2 Data Transmission in DQDB

Figure 13-3 Queues

Figure 13-4 Distributed Queues in a Node

Figure 13-5 Reservation Token in a Queue

Figure 13-6 DQDB Rings

Figure 13-7 DQDB Layers

Figure 13-8 Connecting LANs Using T-1 or T-3 Lines

Figure 13-9 SMDS as a MAN

Figure SIP Levels

Figure An Address in SMDS

Table 12-5 Local Area Network (LAN) Comparison NetworkAccessSignalingData RateError MethodControl EthernetCSMA/CDManchester10 Mbps No Fast EthernetCSMA/CDSeveral100 Mbps No Gigabit EthernetCSMA/CDSeveral 1 Gbps No Token RingToken PassingDiff Manchester4, 16 Mbps Yes FDDIToken Passing4B/5B, NRZ-I100 Mbps Yes

TCP/IP What The Forrest Looks Like (1)

Data Link Physical Apl Protocol Transport TCP UDP Network Physical Network TCP/IP Ethernet TCP/IP What The Forrest Looks Like (2)

Pre- amble To From addr DataPad Check sum Bits: 7 1 2/6 2/ Start of frame delimiter Length of data field What The Trees Look Like 1 (Ethernet Frame)

What The Trees Look Like 2 (IP Header) 32 bits Version IHLType of serviceTotal length IdentificationFragment offset Time to liveProtocolHeader checksum Source address Destination address Options (0 or more words) DFDF MFMF

What The Trees Look Like 3 (TCP Header) 32 bits Source portDestination port Sequence number Acknowledgement number Window size Urgent pointer Options (0 or more 32 bit words) Checksum Data (optional) TCP header length URGURG ACKACK PSHPSH RSTRST SYNSYN FINFIN