Glossary 409MIBManagement Information Base. MIBs containinformation describing specific aspects of networkcomponents.MulticastTransmits copies of a single packet to multiple ports.NNMSNetwork Management System. An interface thatprovides a method of managing a system.NodeA network connection endpoint or a common junctionfor multiple network lines. Nodes include:• Processors• Controllers• WorkstationsOOIDObject Identifier. Used by SNMP to identify managedobjects. In the SNMP Manager/ Agent networkmanagement paradigm, each managed object musthave an OID to identify it.PPacketsBlocks of information for transmission in packetswitched systems.PDUProtocol Data Unit. A data unit specified in a layerprotocol consisting of protocol control informationand layer user data.PINGPacket Internet Groper. Verifies if a specific IPaddress is available. A packet is sent to another IPaddress and waits for a reply.PortPhysical ports provide connecting components thatallow microprocessors to communicate withperipheral equipment.Port MirroringMonitors and mirrors network traffic by forwardingcopies of incoming and outgoing packets from oneport to a monitoring port.For more information on port mirroring, see DefiningPort Mirroring Sessions.Port SpeedIndicates port speed of the port. Port speeds include:• Ethernet 10 Mbps• Fast Ethernet 100Mbps• Gigabit Ethernet 1000 MbpsProtocolA set of rules that governs how devices exchangeinformation across networks.
