Chapter 12 Local Area Networks

1
Chapter 12Local Area Networks

• Project 802
• Ethernet
• Token Ring
• FDDI (Fiber Distributed Data Interface)

? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
2
Figure 12-1
OSI Model and Project 802
Logical Link Control
Medium Access Control
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
3
Figure 12-2
Project 802
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
4
Figure 12-3
PDU Format
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
5
Figure 12-5
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
6
Figure 12-6
Evolution of CSMA/CD
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
7
Figure 12-7
MAC Frame
Q1 7 1 6 6 2 (46 or 1500) 4
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
8
Figure 12-9
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
9
Figure 12-8
Ethernet Segments
? The McGraw-Hill Companies, Inc., 1998
WCB/McGraw-Hill
10
Q2 Solution
Speed of propagation 300,000,000 mps x 60
180,000,000 mps 2500 meters / 180,000,000 mps
13.89 microseconds It would take a bit 13.89
microseconds to travel 2500 meters.
11
Q3 Solution
The minimum frame size is 72 bytes. 72 bytes x 8
bits / byte 576 bits. If the data rate is 10
Mbps, 576 bits can be generated in 576 bits /
10,000,000 bits/second 57.6 microseconds
12
Chapter 24
TCP/IP
13
Figure 24-1
An Internet According to TCP/IP
14
Figure 24-2
TCP/IP and the OSI Model
15
Figure 24-3
IP Datagram
16
Figure 24-4
Internet Address
17
Figure 24-5
Internet Classes
18
Figure 24-6
IP Addresses in Decimal Notation
19
Figure 24-7
Class Ranges of Internet Addresses
20
Figure 24-8
Network and Host Addresses