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Term Denition
NMS
Network Management System. An interface that provides a method of managing a
system.
Node
A network connection endpoint or a common junction for multiple network lines. Nodes
include:
• Processors.
• Controllers.
• Workstations.
O
OID
Object Identier. Used by SNMP to identify managed objects. In the SNMP Manager/
Agent network management paradigm, each managed object must have an OID to
identify it.
OSPF
Open Shortest Path First. A TCP/IP Interior Gateway protocol that calculates the lowest-
cost route, multipath routing, and load balancing.
P
Packet Blocks of information for transmission in packet switched systems.
PDU
Protocol Data Unit. A data unit specied in a layer protocol consisting of protocol control
information and layer user data.
PING
Packet Internet Groper. Veries if a specic IP address is available. A packet is sent to
another IP address and waits for a reply.
Policing
Determines if trafc levels are within a specied prole. Policing manages the maximum
trafc rate used to send or receive packets on an interface.
Port
Physical ports provide connecting components that allow microprocessors to
communicate with peripheral equipment.
Port Mirroring
Monitors and mirrors network traffic by forwarding copies of incoming and outgoing
packets from one port to a monitoring port.
Port Speed
Indicates port speed. Port speeds include:
• Ethernet 10 Mbps.
• Fast Ethernet 100Mbps.
• Gigabit Ethernet 1000 Mbps.
PPP
Point-to-Point Protocol. Enables connecting to the Internet over a serial link. PPP
establishes sessions between a PC and an ISP using the Link Control Protocol (LCP).
Privilege
An authorizations set that performs security-relevant functions, for example, user access
to a device.
Protocol A set of rules that governs how devices exchange information across networks.
Protocol Stack Layered set of protocols working together to provide networking functions.
Q
QoS
Quality of Service. QoS provides policies that contain sets of lters (rules). QoS allows
network managers to decide how and what network traffic is forwarded according to
priorities, application types, and source and destination addresses.
Query Extracts information from a database and presents the information for use.
R
RADIUS
Remote Authentication Dial-In User Service. A method for authenticating system users,
and tracking connection time.
RDP
Remote Desktop Protocol. Allows a clients to communicate with the Terminal Server over
the network.