Cisco NM-NAM= Datasheet download pdf (Page 75)

Network Analysis Module (NM-NAM)

Glossary

Cisco IOS Release: Multiple releases (see the Feature History Table)

Glossary

AAA—authentication, authorization, and accounting. Pronounced “triple a.”

access list—A list kept by routers to control access to or from the router for a number of services (for

example, to prevent packets with a certain IP address from leaving a particular interface on the router).

CEF—Cisco Express Forwarding.

DSMON—Differentiated Services Monitoring.

flooding—Traffic passing technique used by switches and bridges in which traffic received on an

interface is sent out all the interfaces of that device except the interface on which the information was

received originally.

GRE—generic routing encapsulation. Tunneling protocol developed by Cisco that can encapsulate a

wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link to Cisco

routers at remote points over an IP internetwork. By connecting multiprotocol subnetworks in a

single-protocol backbone environment, IP tunneling using GRE allows network expansion across a

single-protocol backbone environment.

GUI—graphical user interface. A user environment that uses pictorial as well as textual representations

of the input and the output of applications and the hierarchical or other data structure in which

information is stored. Such conventions as buttons, icons, and windows are typical, and many actions are

performed using a pointing device (such as a mouse). Microsoft Windows and the Apple Macintosh are

prominent examples of platforms using a GUI.

IP multicast—Routing technique that allows IP traffic to be propagated from one source to a number of

destinations or from many sources to many destinations. Rather than sending one packet to each

destination, one packet is sent to a multicast group identified by a single IP destination group address.

MIB—Management Information Base. Database of network management information that is used and

maintained by a network management protocol, such as SNMP or Common Management Information

Protocol (CMIP). The value of a MIB object can be changed or retrieved using SNMP or CMIP

commands, usually through a GUI network management system. MIB objects are organized in a tree

structure that includes public (standard) and private (proprietary) branches.

NAT—Network Address Translation. Mechanism for reducing the need for globally unique IP

addresses. NAT allows an organization with addresses that are not globally unique to connect to the

Internet by translating those addresses into globally routable address space. Also known as Network

Address Translator.

NetFlow—A feature of some routers that allows them to categorize incoming packets into flows.

Because packets in a flow often can be treated in the same way, this classification can be used to bypass

some of the work of the router and accelerate its switching operation.

PCI—Peripheral Component Interconnect. An industry local bus standard.

QoS—quality of service. Cisco IOS QoS technology lets complex networks control and predictably

service a variety of networked applications and traffic types.

RMON—remote monitoring. MIB agent specification described in RFC 1271 that defines functions for

the remote monitoring of networked devices. The RMON specification provides numerous monitoring,

problem detection, and reporting capabilities.

SNMP—Simple Network Management Protocol. Network management protocol used almost

exclusively in TCP/IP networks. SNMP provides a means to monitor and control network devices, and

to manage configurations, statistics collection, performance, and security. SNMPv2c supports

centralized and distributed network management strategies and includes improvements in the Structure

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