Agenda

1
Agenda
1. QUIZ 2. HOMEWORK 3. LOCAL AREA NETWORKS
4. WIDE AREA NETWORKS
2
Homework
12-1, 12-4, 12-11, 12-16, 12-18, 12-20,
12-67 13-8, 13-12, 13-13, 13-16
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Chapter 12
Local Area Networks
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Figure 12-1
LAN Compared with the OSI Model
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Figure 12-2
Project 802
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LANs Layers
Source Port
802.2 Logical Link Control
Data Link Layer
802.1 Bridging
CSMA Token Token MAN IVD
Wire- Future

less CD Bus Ring 802.3
802.4 802.5 802.6 802.9
802.11

Physical Layer
802.7 Broadband Tag
802.8 Fiber Optic Tag
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Point To Multipoint Protocol Building Blocks
Ethernet
Carrier Sense Multiple Access with Collision
Detection--40-70 Throughput
Carrier Sense Multiple Access-- Up to 55
Throughput
Slotted ALOHA--Up to 37 Throughput
ALOHA--Up to 18 Throughput
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Figure 12-3
PDU Format
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Figure 12-4
Control Field in a PDU
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Figure 12-5
IEEE 802.3
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Figure 12-6
Collision in CSMA/CD
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Figure 12-7
802.3 MAC Frame
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Figure 12-8
Ethernet Segments
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Figure 12-9
Topology of 10Base5
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Figure 12-10
Transceiver Connection in 10Base5
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Figure 12-11
Topology of 10Base2
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Figure 12-12
10Base-T Topology
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Figure 12-14
An Ethernet Network Using A Hub
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Figure 12-15
An Ethernet Network Using a Switch
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Figure 12-16
Categories of Fast Ethernet Implementations
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Figure 12-17
100Base-TX Implementation
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Figure 12-18
100Base-FX Implementation
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Figure 12-19
100Base-T4 Implementation
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Figure 12-20
Use of Gigabit Ethernet
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Table 12-1
Gigabit Ethernet Implementations
Feature 1000Base-SX 1000Base-LX 1000Base-CX 1000B
AseT Medium Optical Fiber Optical
Fiber STP UTP multi-mode multi or
single Signal Short-wave Long-wave Electrical Ele
ctrical laser laser Max 550 m 550 m m-mode 25
m 25 m 5000 m s-mode
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Figure 12-21
Token Passing
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Figure 12-22
Token Ring Frame
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Figure 12-24
Token Ring
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Figure 12-25
Token Ring Switch
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Figure 12-27
FDDI Operation
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Figure 12-29
FDDI Layers
32
Figure 12-30
FDDI Frame Types
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Figure 12-31
FDDI Ring
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Figure 12-32
FDDI Ring after a Failure
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Figure 12-33
Node Connections
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Chapter 13
Metropolitan Area Networks IP to TCP
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Figure 13-1
DQDB Buses and Nodes
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Figure 13-2
Data Transmission in DQDB
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Figure 13-3
Queues
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Figure 13-4
Distributed Queues in a Node
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Figure 13-5
Reservation Token in a Queue
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Figure 13-6
DQDB Rings
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Figure 13-7
DQDB Layers
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Figure 13-8
Connecting LANs Using T-1 or T-3 Lines
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Figure 13-9
SMDS as a MAN
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Figure 13-10
SIP Levels
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Figure 13-11
An Address in SMDS
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Table 12-5
Local Area Network (LAN) Comparison
Network Access Signaling Data
Rate Error Method Control Ethernet CSMA/C
D Manchester 10 Mbps No Fast
Ethernet CSMA/CD Several 100 Mbps No Gigabit
Ethernet CSMA/CD Several 1 Gbps No Token
Ring Token Passing Diff Manchester 4, 16 Mbps
Yes FDDI Token Passing 4B/5B, NRZ-I 100 Mbps
Yes
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TCP/IPWhat The Forrest Looks Like (1)
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TCP/IPWhat The Forrest Looks Like (2)
TCP/IP
Ethernet
Apl Protocol Transport TCP UDP Network Physical
Network
Data Link Physical
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What The Trees Look Like 1 (Ethernet Frame)
Bits 7 1 2/6 2/6 2
0 - 1500 0 - 46 4

To From addr addr
Pre- amble
Data
Pad Check sum
Start of frame delimiter
Length of data field
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What The Trees Look Like 2 (IP Header)
32 bits
IHL
Type of service
Total length
Version
D F
M F
Identification
Fragment offset
Time to live
Protocol
Header checksum

Source address
Destination address
Options (0 or more words)
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What The Trees Look Like 3 (TCP Header)
32 bits
Source port
Destination port
Sequence number
Acknowledgement number

TCP header length
U R G
A C K
P S H
R S T
S Y N
F I N
Window size
Urgent pointer
Checksum
Options (0 or more 32 bit words)
Data (optional)