2-way state In OSPF, a neighbor state that implies that the router has exchanged Hellos with the neighbor and that all required parameters match.
3G/4G Internet An Internet access technology that uses wireless radio signals to communicate through mobile phone towers, most often used by mobile phones, tablets, and some other mobile devices.
802.1Q The IEEE standardized protocol for VLAN trunking.
AAA server See authentication, authorization, and accounting (AAA) server.
ABR Area Border Router. A router using OSPF in which the router has interfaces in multiple OSPF areas.
access interface A LAN network design term that refers to a switch interface connected to end-user devices, configured so that it does not use VLAN trunking.