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IP
IP is an acronym for Internet Protocol. It is a protocol used for communicating data across
an Internet network.
IP is a "best effort" system, which means that no packet of information sent over is
assured to reach its destination in the same condition it was sent. Each device connected
to a Local Area Network (LAN) or Wide Area Network (WAN) is given an Internet Protocol
address, and this IP address is used to identify the device uniquely among all other
devices connected to the extended network.
The current version of the Internet protocol is IPv4, which has 32-bits Internet Protocol
addresses allowing for in excess of four billion unique addresses. This number is reduced
drastically by the practice of Webmasters taking addresses in large blocks, the bulk of
which remain unused. There is a rather substantial movement to adopt a new version of
the Internet Protocol, IPv6, which would have 128-bits Internet Protocol addresses. This
number can be represented roughly by a three with thirty-nine zeroes after it. However,
IPv4 is still the protocol of choice for most of the Internet.
IPMC
IPMC is an acronym for IP MultiCast.
IP Source Guard
IP Source Guard is a secure feature used to restrict IP traffic on DHCP snooping
untrusted ports by filtering traffic based on the DHCP Snooping Table or manually
configured IP Source Bindings. It helps prevent IP spoofing attacks when a host tries to
spoof and use the IP address of another host.
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LACP
LACP is an IEEE 802.3ad standard protocol. The Link Aggregation Control Protocol
allows bundling several physical ports together to form a single logical port.
LLC
The IEEE 802.2 Logical Link Control (LLC) protocol provides a link mechanism for upper
layer protocols. It is the upper sub-layer of the Data Link Layer and provides multiplexing
mechanisms for several network protocols (IP, IPX) to coexist within a multipoint network.
LLC header consists of 1 byte DSAP (Destination Service Access Point), 1 byte SSAP
(Source Service Access Point), 1 or 2 bytes Control field, followed by LLC information.
LLDP
LLDP is an IEEE 802.1ab standard protocol.
The Link Layer Discovery Protocol (LLDP) specified in this standard allows stations
attached to an IEEE 802 LAN to advertise, to other stations attached to the same IEEE
802 LAN, the major capabilities provided by the system incorporating that station, the
management address or addresses of the entity or entities that provide management of
those capabilities, and the identification of the stations point of attachment to the IEEE
802 LAN required by those management entity or entities. The information distributed via
this protocol is stored by its recipients in a standard Management Information Base (MIB),
making it possible for the information to be accessed by a Network Management System
(NMS) using a management protocol such as the Simple Network Management Protocol
(SNMP).
LLDP-MED
LLDP-MED is an extension of IEEE 802.1ab and is defined by the telecommunication
industry association (TIA-1057).
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