Dell OpenManage Server Administrator Version 6.0.1 Guide de l'utilisateur télécharger pdf (Page 40)

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40 Introduction

The first component, 011, is the country code for the United States.

The second component, 512, identifies the area code for central Texas.

The third component, 471, is the phone exchange for a large state university

in the city of Austin. The final component, 0000, is the main switchboard.

There are two main differences between the phone number example and an

actual OID. The first difference is that there are many more components in

an OID, up to 128. The combination of these components is called an OID

prefix. The second difference is that OIDs support the concept of indexes or

keys. The OID prefix specifies the data class but does not specify an instance of

the data within the class. Indexes can be used to identify the instances of a data

class. These indexes are referred to as the OID suffix.

The assignment of values for each OID prefix component can be illustrated

by using a tree structure. The following is an example of an OID assignment:

ROOT

CCITT(0)

ISO(

ORG(

DOD(

INTERNET(

MGMT(2)

MIB(1)

EXPERIMENTAL(3)

PRIVATE(

ENTERPRISES(

DELL(

674)

SNMPv2(6)

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