Cisco Systems OL-11291-01 manual See duration, GL-4

Glossary

I

ICMP	Internet Control Message Protocol. Network layer Internet protocol that reports errors and provides
	other information relevant to IP packet processing. Documented in RFC 792.
Internet Control	See ICMP.
Message Protocol
Internet Protocol	See IP.
Internetwork	See IPM.
Performance Monitor
interval	See duration.
IP	Internet Protocol. Network layer protocol in the TCP/IP stack offering a connectionless internetwork
	service. IP provides features for addressing, type-of-service specification, fragmentation and
	reassembly, and security. Documented in RFC 791.
IPM	IPM is an application for measuring and monitoring network performance statistics such as network
	latency, jitter, availability, packet loss, and errors. You can view these statistics in real time or have
	IPM store them in its database for historical analysis. You can also use IPM to establish network
	baselines and monitor thresholds.
IP address	32-bit address assigned to hosts using TCP/IP. An IP address belongs to one of five classes (A, B, C,
	D, or E) and is written as 4 octets separated by periods (dotted decimal format). Each address consists
	of a network number, an optional subnetwork number, and a host number. The network and
	subnetwork numbers together are used for routing, while the host number is used to address an
	individual host within the network or subnetwork. A subnet mask is used to extract network and
	subnetwork information from the IP address. CIDR provides a new way of representing IP addresses
	and subnet masks. See also IP.
IPM Administrative	To protect the integrity of your IPM database, IPM provides client security, which enables you to
Password	define an IPM Administrative password. IPM prompts you to enter this Administrative password to
	access the client functions like opening the seed files, launching the Secure Web clients, using the
	ipm tshoot troubleshooting command, and Downloading the IPM client software from the IPM
	Server Home Page.

J

Jitter	The variance in latency between a source and a target. Jitter is an important QoS metric for voice and
	video applications.

L

latency

leased line

The time it takes for a network packet to transit between a source and a target.

Transmission line reserved by a communications carrier for the private use of a customer. A leased line is a type of dedicated line. See dedicated line.

	User Guide for Internetwork Performance Monitor
GL-4	OL-11291-01