Glossary

 

example, a sub-network 192.168.16.64 with mask

 

255.255.255.224, the addresses we may assign to computers

 

on the sub-network are 192.168.16.65 to 192.168.16.94, with

 

a broadcast address of 192.168.16.95.

 

A number used by software to separate the local subnet

 

address from the rest of a given Internet protocol address

 

Network masks divide IP addresses into two parts (network

 

address and address of a particular host within the network).

 

Mask have the same form as IP addresses (i.e.

 

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

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