
308627-14.20 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
Addresses and Variable-Length Masks ........................................................................1-10
Address Resolution Protocol (ARP) .............................................................................1-10
Reverse Address Resolution Protocol (RARP) .............................................................1-13
Routing Information Protocol (RIP) ...............................................................................1-14
Open Shortest Path First (OSPF) Protocol ...................................................................1-14
OSPF Neighbors ....................................................................................................1-15
Neighbor Adjacencies ............................................................................................1-15
Designated Routers ...............................................................................................1-16
AS External Routes ................................................................................................1-16
OSPF Areas ...........................................................................................................1-17
Stub Area .........................................................................................................1-18
Not-So-Stubby Area (NSSA) ...........................................................................1-18
OSPF Router Types ...............................................................................................1-19
OSPF Implementation Notes .................................................................................1-19
Router Discovery Protocol ............................................................................................1-20
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