H3C Technologies H3C Intelligent Management Center - Manual (Page 128)

120
be quite distant from one another, MPLS improves efficiency and throughput by avoiding complex
lookups in routing tables. In addition, MPLS can encapsulate packets of various network protocols.
NQA—Acronym for Network Quality Analyzer, an H3C tool for analyzing network performance,
services, and service quality by sending test packets to H3C routers, switches and other supported
devices.
OAM—Acronym for operations, administration, and maintenance. In QoSM, OAM refers to a set of
general network devices that an organization requires for normal data center operations. These services
include ICMP, Telnet, rLogin, SNMP, Radius, and more, and can be classified, monitored, and controlled
via QoS policy in QoSM.
OSPF—Acronym for Open Shortest Past First, a connection-less routing protocol for IP networks specified
in RFC 2328. OSPF traffic does not use a TCP/IP transport protocol UDP, TCP), but is encapsulated
directly in IP datagrams that contain sufficient information to be routed from the source to the destination.
In QoSM, OSPF traffic can be classified, monitored, and controlled via a QoS policy.
P2P—Acronym for Peer-to-Peer, a distributed network architecture that partitions the workload across all
connected nodes, known as peers. P2P was first widely deployed by Napster, and now BitTorrent is the
preeminent company deploying a P2P network. In QoSM, P2P traffic can be classified, monitored, and
controlled via QoS policy.
PHB—Acronym for Per-Hop Behavior, a forwarding method implemented by DiffServ-enabled routers
that uses information in the packet to determine policy and priority of the packet.
PPP—Acronym for Point-to-Point Protocol, a data link protocol for establishing a direct connection
between two networking nodes.
Quality of service (QoS)—In the networking industry, using specialized tools to monitor and identify
different types of network traffic (voice, video, etc.), and to establish priority and throughput levels to
optimize business processes.
RADIUS—An acronym for Remote Authentication Dial In User Service, a networking protocol often used
by Internet service providers that provides centralized authentication, authorization, and accounting
management for computers to connect to and use a network. In QoSM, RADIUS is among the network
traffic types classified as OAM traffic. Typically using UDP ports 1812 and 1813, RADIUS traffic can be
classified, monitored, and controlled via a QoS policy.
RIP—Acronym for Routing Information Protocol, one of the two major routing protocols supported by
many H3C networking devices. QoSM includes RIP traffic as one of the Network Protocol Traffic types
that can classify, monitor, and control via QoS policy. RIP traffic typically uses UDP port 520.
rlogin—An abbreviation of Remote Login, an application layer protocol that is part of the TCP/IP
protocol suite. In QoSM, rlogin is among the network traffic types classified as OAM traffic. Typically
using UDP port 513, rlogin traffic can be classified, monitored, and controlled via a QoS policy.
Router—A fundamental networking device that forwards data packets between networks. QoSM works
with a host of H3C and other vendors' routers to classify, monitor, and provide flow policies for the many
different packet types that constitute network traffic.
SIP—Acronym for Session Initiation Protocol, a signaling protocol typically used for voice and video
communication sessions over IP. QoSM includes SIP traffic as one of the Call Signaling traffic types that
it can classify, monitor, and control via a QoS policy. SUP traffic typically uses TCP or UDP port 5060.
SNMP—Acronym for Simple Network Messaging Protocol, the standard communications protocol and a
set of standards for managing devices (routers, switches, modems, servers, printers, etc.) on IP networks.
In QoSM, SNMP is among the network traffic types classified as OAM traffic. Typically using UDP ports
161 and 162, SNMP traffic can be classified, monitored, and controlled via the QoS policy.