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The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on a local area network based on IEEE 802 technology, principally wired Ethernet. [1]
It can be allowed or disallowed for domains, and private and public networks. The Mapper sends discovery command packets onto the local network segment via a raw network interface socket. The second component of LLTD are the LLTD Responders which answer Mapper requests about their host and possibly other discovered network information.
Several protocols provide the CLNS service: [3] Connectionless-mode Network Protocol (CLNP), as specified in ITU-T Recommendation X.233. [6]End System-to-Intermediate System (ES-IS), a routing exchange protocol for use in conjunction with the protocol for providing the CLNS (ISO 9542).
RDMA over Converged Ethernet (RoCE) [1] is a network protocol which allows remote direct memory access (RDMA) over an Ethernet network. There are multiple RoCE versions. RoCE v1 is an Ethernet link layer protocol and hence allows communication between any two hosts in the same Ethernet broadcast domain.
Port Based Network Access Control Superseded by 802.1X-2004 P802.1aa Maintenance to 802.1X-2001 Merged into 802.1X-2004 802.1X-2004: Port Based Network Access Control (Rollup of 802.1X-2001 and P802.1aa) Incorporated into 802.1Q-2005 P802.1af Media Access Control (MAC) Key Security Merged into 802.1X-2010 802.1X-2010: Port Based Network Access ...
Those protocols are used to inform neighboring devices about each other and to provide (data link layer) parameters to network a new device. ^ Device Discovery Protocols in LLDP-MED and Cisco Discovery Protocol , white paper by Cisco Systems, 2006
The Link-Local Multicast Name Resolution (LLMNR) is a protocol based on the Domain Name System (DNS) packet format that allows both IPv4 and IPv6 hosts to perform name resolution for hosts on the same local link.
Label Distribution Protocol (LDP) is a protocol in which routers capable of Multiprotocol Label Switching (MPLS) exchange label mapping information. Two routers with an established session are called LDP peers and the exchange of information is bi-directional.