Black Box Advanced Console Server, User Manual

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Glossary
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255.255.255.0), however, its value is needed to be understood
as a 32-bit number with certain number of ones on the left
end and zeros as the rest. The mask cannot have an arbitrary
value. The primary function of a subnet mask is to define the
number of IP hosts that participate in an IP subnet.
Computers in the same IP subnet should not require a router
for network communication.
NFS Network File System is a protocol suite developed and
licensed by Sun Microsystems that allows different makes of
computers running different operating systems to share files
and disk storage. NFS is implemented using a connectionless
protocol (UDP) in order to make it stateless.
NTP Network Time Protocol . A standard for synchronizing your
system clock with the ``true time'', defined as the average of
many high-accuracy clocks around the world.
Object Identifiers ( OID ) The SNMP manager or the management application uses a
well-defined naming syntax to specify the variables to the
SNMP agent. Object names in this syntax are called Object
Identifiers (Object IDs or OIDs). OIDs are series of numbers
that uniquely identify an object to an SNMP agent. OIDs are
arranged in a hierarchical, inverted tree structure.
The OID tree begins with the root and expands into branches.
Each point in the OID tree is called a node and each node will
have one or more branches, or will terminate with a leaf node.
The format of OID is a sequence of numbers with dots in
between.
There are two roots for Object Identifiers, namely iso and
ccit. iso starts with.1 and ccit starts with.0. Most Object
Identifiers start with.1.3.6.1, where 1=iso, 3=org, 6= dod,
1 = internet. The Internet sub-tree branches into mgmt and
private.
To understand the concept of relative and absolute Object
Identifiers, let us consider the AdventNet Object
Identifier.1.3.6.1.4.1.2162. It specifies the path from the root
of the tree. The root does not have a name or a number but the