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Glossary 395
PING
Packet Internet Groper.
Verifies if a specific IP address is available. A packet is sent to another IP address and waits
for a reply.
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.
For more information on port mirroring, see
Defining Port Mirroring Sessions
.
Port Speed
Indicates port speed of the port. Port speeds include:
• Ethernet 10 Mbps
• Fast Ethernet 100Mbps
• Gigabit Ethernet 1000 Mbps
Protocol
A set of rules that governs how devices exchange information across networks.
Q
QoS
Quality of Service.
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.
RMON
Remote Monitoring
. Provides network information to be collected from a single workstation.
Router
A device that connects to separate networks. Routers forward packets between two or more networks. Routers
operate at a Layer 3 level.