Network Glossary #

224.0.0.2 The IP address to which Label Distribution Protocol (LDP) sends LDP Hellos. Also used in IP multicast to send packets to all multicast routers.

224.0.0.5 The All OSPF Routers multicast IP address, listened for by all OSPF routers.

224.0.0.6 The All OSPF DR Routers multicast IP address, listened for by DR and BDR routers.

2Way (OSPF) A neighbor state that signifies the other router has reached neighbor status, having passed the parameter check.

6to4 An IPv6/IPv4 tunneling method that allows isolated IPv6 domains to be connected over an IPv4 network.

802.11a A wireless LAN physical layer that operates at up to 54-Mbps data rates using OFDM in the 5-GHz band.

802.11b A wireless LAN physical layer that operates at up to 11-Mbps data rates using DSSS in the 2.4-GHz band.

802.11g A wireless LAN physical layer that is backward compatible with 802.11b and operates at up to 54-Mbps data rates using OFDM in the 2.4-GHz band.

802.11n A prestandard (at the time of publication) wireless LAN physical layer that offers data rates in the hundreds of megabits per second.

802.1Q The IEEE standardized protocol for VLAN trunking.

802.1Q-in-Q A mechanism in which VLAN information can extend over another set of 802.1Q trunks by tunneling the original 802.1Q traffic with another 802.1Q tag. It allows a service provider to support transparent VLAN services with multiple customers, even if the customers use overlapping VLAN numbers.