Object Identifiers

Namespace
defines a set of names
Tree structured
Numeric
With names for readability

Upper levels of tree define registration authority
Authority assigns branches to organisations
Organisations assign branches to projects
. . .

mib-2  .1.3.6.1.2.1
.iso.org.dod.internet.mgmt.mib-2
.iso.org.dod.internet.mgmt.experimental (3)
.iso.org.dod.internet.mgmt.private (4)
.iso.org.dod.internet.mgmt.security (5)