ix
Upgrading an IOS Image into Flash Memory
48
Choosing Which IOS Image to Load
50
Scenario 2-1
61
Questions on Scenario 2-1
62
Scenario 2-2
63
Questions on Scenario 2-2
63
Scenario 2-1 Answers
66
Scenario 2-2 Answers
66
Chapter 3
OSI Reference Model & Layered Communication
68
How to Best Use This Chapter
69
"Do I Know This Already?" Quiz
70
The OSI, TCP/IP, and NetWare Protocol Architectures
74
OSI: Origin and Evolution
74
OSI Layers
75
Layering Benefits and Concepts
78
Interaction Between OSI Layers
79
The TCP/IP and NetWare Protocols
86
OSI Transport Layer Functions
87
Connection-Oriented Versus Connectionless Protocols
87
How Error Recovery Is Accomplished
89
Flow Control
91
OSI Data Link Layer Functions
94
Data Link Function 1: Arbitration
95
Data Link Function 2: Addressing
96
Data Link Function 3: Error Detection
98
Data Link Function 4: Identifying the Encapsulated Data
98
Summary: Data Link Functions
102
OSI Network Layer Functions
103
Routing
103
Network Layer (Layer 3) Addressing
107
Scenario 3-1
121
Task 1 for Scenario 3-1
122
Task 2 for Scenario 3-1
123
Task 3 for Scenario 3-1
123
Answers to Task 1 for Scenario 3-1
124
fm.fm Page ix Monday, March 20, 2000 4:55 PM