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The following list describes each of the available protocols.
Protocol Description
PPPoE This is the abbreviation of Point-to-Point Protocol over Ethernet.
Many DSL modems use PPPoE to establish and maintain a
connection with a service provider. PPPoE provides a means of
logging in to the ISPs servers so that they can
authenticate
you
as a customer and provide you access to the Internet. Check with
your ISP before blocking this protocol.
IP Multicast IP Multicast is an extension to the IP protocol. It enables
individual
packets to be sent to multiple hosts on the Internet, and
is often used
for handling e-mail, mailing lists and
teleconferencing/videoconferencing.
RARP This is the abbreviation of Reverse Address Resolution Protocol.
This IP protocol provides a way for computers to determine their
own IP addresses when they only know their hardware address
(i.e., MAC addresses). Certain
types of computers, such as
diskless workstations, must use RARP
to determine their IP
address before communicating with other network devices.
AppleTalk
This is a networking protocol used for Apple Macintosh
®
networks.
NetBEUI This is the abbreviation of NetBIOS Enhanced User Interface.
On many LAN operating systems, the NetBEUI protocol provides
the method by which
computers identify themselves to and
communicate with each other.
IPX This is the abbreviation of Internet work Packet Exchange. A
networking protocol used on Novell Netware-based LANs.
BPDU This is the abbreviation of Bridge Protocol Data Unit. BPDUs are
data messages that are
exchanged across the switches between
LANs that are connected by a bridge. BPDU packets contain
information on ports, addresses, priorities and costs, and are
exchanged across bridges to detect and
eliminate loops in a
network.
ARP
Address Resolution Protocol. Computers on a LAN use ARP
to learn the hardware addresses (i.e., MAC addresses) of other
computers
when they only know their IP addresses.
IPV6 Multicast This field displays IP Multicasting under IP Protocol version 6.
See IP Multicast above.
802.1.Q This IEEE specification defines a protocol for virtual LAN
s
on
Ethernet networks. A virtual LAN is a group of PCs that function as
a local area network, even though the PCs may not be physically
connected. They are commonly used to facilitate administration
of large networks.