PC Concepts ADSL2+ User Manual

LANs. 

BPDU: 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 know only their IP addresses 

IPV6 Multicast: IP Multicasting under IP Protocol version 6. See IP Multicast above. 

802.1.Q: This IEEE specification defines a protocol for virtual LANs 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. 

 

Dynamic DNS (DDNS) is a service that facilitates outside Internet access to a LAN host 

even when the host's dynamically-assigned IP address changes frequently.