See also all-routes explorer packet , explorer packet , and spanning explorer packet . Local Management Interface See LMI . LocalTalk Apple proprietary baseband protocol that operates at the data link and physical layers of the OSI reference model. Defined in the IEEE 802.1 standard. See also IEEE 802.1 .
Packet switching allows many logical channels to exist simultaneously on a single physical channel.
Logical Link Control See LLC . Logical Link Control, type 2 See LLC2 . Logical Unit 6.2 See LU 6.2 . Loopback tests are often used to test network interface usability. See LEN node .