
308627-14.00 Rev 00
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Contents
Preface
Before You Begin ............................................................................................................xvii
Text Conventions ...........................................................................................................xviii
Acronyms .........................................................................................................................xix
Related Publications ........................................................................................................xxi
How to Get Help .............................................................................................................xxii
Chapter 1
IP Concepts, Terminology, and Features
IP Addresses ..................................................................................................................1-2
Subnet Addressing ...................................................................................................1-4
Supernet Addressing ...............................................................................................1-7
Classless Interdomain Routing ................................................................................1-8
Autonomous Systems .....................................................................................................1-8
Address Resolution Protocol (ARP) .............................................................................1-10
Reverse Address Resolution Protocol (RARP) .............................................................1-12
Routing Information Protocol (RIP) ...............................................................................1-13
Open Shortest Path First (OSPF) Protocol ...................................................................1-13
OSPF Addresses and Variable-Length Masks .......................................................1-14
OSPF Neighbors ....................................................................................................1-14
Neighbor Adjacencies ............................................................................................1-14
Designated Routers ...............................................................................................1-15
OSPF Areas ...........................................................................................................1-16
Stub Area .........................................................................................................1-17
Not-So-Stubby Area (NSSA) ...........................................................................1-17
OSPF Router Types ...............................................................................................1-18
AS External Routes ................................................................................................1-18
OSPF Implementation Notes .................................................................................1-19
Router Discovery Protocol ............................................................................................1-20
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