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for in excess of four billion unique addresses. This number is reduced drastically by the practice of web
masters 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 zeros after it. However, IPv4 is
still the protocol of choice for most of the Internet.
IPMC
IPMC is an acronym for IP MultiCast.
IPMC supports IPv4 and IPv6 multicasting. IPMCv4 denotes multicast for IPv4. IPMCv6 denotes multicast
for IPv6.
IPMC Profile
IPMC Profile is an acronym for IP MultiCast Profile.
IPMC Profile is used to deploy the access control on IP multicast streams.
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.
IVL
In Independent VLAN Learning, every VLAN uses its own logical source address table as opposed to SVL
where two or more VLANs share the same part of the MAC address table.
RocketLinx MP1204-XT User Guide: 2000644 Rev. A
Glossary - 395
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