Transcript Document

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, 12-67
13-8, 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
Source802.2
Port Logical Link Control
802.1 Bridging
CSMA Token
Token
CD
Bus
Ring
802.3
802.4
802.5
MAN
IVD
Wireless
802.6
802.9
802.11
802.7 Broadband Tag
802.8 Fiber Optic Tag
Future
Data
Link
Layer
Physical
Layer
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
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 12-7
802.3 MAC Frame
Figure 12-8
Ethernet Segments
Figure 12-9
Topology of 10Base5
Figure 12-10
Transceiver Connection in 10Base5
Figure 12-11
Topology of 10Base2
Figure 12-12
10Base-T Topology
Figure 12-14
An Ethernet Network Using A Hub
Figure 12-15
An Ethernet Network Using a Switch
Figure 12-16
Categories of Fast Ethernet Implementations
Figure 12-17
100Base-TX Implementation
Figure 12-18
100Base-FX Implementation
Figure 12-19
100Base-T4 Implementation
Figure 12-20
Use of Gigabit Ethernet
Table 12-1
Gigabit Ethernet Implementations
Feature 1000Base-SX
1000Base-LX
1000Base-CX
1000BAseT
Medium Optical Fiber
multi-mode
Optical Fiber
multi or single
STP
UTP
Signal
Short-wave
laser
Long-wave
laser
Electrical
Electrical
Max
550 m
550 m m-mode
5000 m s-mode
25 m
25 m
Figure 12-21
Token
Passing
Figure 12-22
Token Ring Frame
Figure 12-24
Token Ring
Figure 12-25
Token
Ring
Switch
Figure 12-27
FDDI Operation
Figure 12-29
FDDI Layers
Figure 12-30
FDDI Frame Types
Figure 12-31
FDDI Ring
Figure 12-32
FDDI Ring after a Failure
Figure 12-33
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 13-10
SIP Levels
Figure 13-11
An Address in SMDS
Table 12-5
Local Area Network (LAN) Comparison
Network
Access
Method
Signaling
Data Rate
Error
Control
Ethernet
CSMA/CD
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
TCP/IP
What The Forrest Looks Like (1)
User Applications
Telnet FTP SMTP XWindows
Transmission Control Protocol
TFTP NFS SunRPC SNMP
User Datagram Protocol
(TCP)
(UDP)
Internet Protocol (IP)
Physical Network
TCP/IP
What The Forrest Looks Like (2)
TCP/IP
Ethernet
Apl Protocol
Transport
TCP UDP
Network
Physical
Network
Data Link
Physical
What The Trees Look Like 1
(Ethernet Frame)
Bits:
7
1 2/6
Preamble
2/6
2
To
From
addr addr
Start of
frame
delimiter
0 - 1500
Data
Length of
data field
0 - 46
4
Pad
Check
sum
What The Trees Look Like 2
(IP Header)
32 bits
Version
IHL
Type of service
DM
F F
Identification
Time to live
Total length
Protocol
Fragment offset
Header checksum
Source address
Destination address
Options (0 or more words)
What The Trees Look Like 3
(TCP Header)
32 bits
Source port
Destination port
Sequence number
Acknowledgement number
TCP
header
length
U A
R C
G K
P
S
H
R S
S Y
T N
F
I
N
Checksum
Window size
Urgent pointer
Options (0 or more 32 bit words)
Data (optional)