SMC Networks SMC7204BRA manual Your ISP before blocking this protocol, Communicate with each other

	Blocked 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.

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