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Glossary 177
IEEE
Institute of Electrical and Electronics Engineers.
An
Engineering organization that develops
communications and networking standards.
IEEE 802.1d
Used in the Spanning Tree Protocol, IEEE 802.1d
supports MAC bridging to avoid network loops.
IEEE 802.1p
Prioritizes network traffic at the data-link/MAC
sublayer.
IEEE 802.1Q
Defines the operation of VLAN Bridges that permit
the definition, operation, and administration of
VLANs within Bridged LAN infrastructures.
Image File
The system image is saved in a Flash sector called
image.
Ingress Port
Ports on which network traffic is received.
IP
Internet Protocol.
Specifies the format of packets
and there addressing method. IP addresses packets
and forwards the packets to the correct port.
IP Address
Internet Protocol Address
. A unique address
assigned to a network device with two or more
interconnected LANs or WANs.
IPX
Internetwork Packet Exchange
. Transmits
connectionless communications.
J
Jumbo Frames
Enables transporting the identical data in fewer
frames. Jumbo Frames reduce overhead, lower
processing time, and ensures fewer interrupts.
L
LAG
Link Aggregated Group
. Aggregates ports or VLANs
into a single virtual port or VLAN.
For more information on LAGs, see Defining LAG
Membership
.
LAN
Local Area Networks.
A network contained within a
single room, building, campus or other limited
geographical area.
Layer 2
Data Link Layer or MAC Layer
. Contains the
physical address of a client or server station. Layer 2
processing is faster than Layer 3 processing because
there is less information to process.Layer 4
Establishes a connections and ensures that all data
arrives to their destination. Packets inspected at the
Layer 4 level are analyzed and forwarding decisions
based on their applications.