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IGMP:
IGMP is an acronym for Internet Group Management Protocol. It is a
communications protocol used to manage the membership of Internet
Protocol multicast groups. IGMP is used by IP hosts and adjacent multicast
routers to establish multicast group memberships. It is an integral part of the
IP multicast specification, like ICMP for unicast connections. IGMP can be used
for online video and gaming. It allows for more efficient use of resources when
supporting these uses.
IGMP Querier:
A router sends IGMP Query messages to a particular link. This router
is called the Querier.
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. 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. IPv4 has 32
-
bits Internet
Protocol addresses, allowing for an 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.
L
LACP:
LACP is an IEEE 802.3ad standard protocol. The Link Aggregation Control
Protocol allows bundling of 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. It
provides multiplexing mechanisms that make it possible 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), and 1 or 2 bytes Control field followed by LLC information.
