Frame Preemption (802.3br-2016 and 802.1Qbu-2016) Scheduled Traffic (802.1Qbv-2015) Bounded low latency Cyclic Queuing and Forwarding (802.1Qch-2017) Asynchronous Traffic Shaping (802.1Qcr-2020) Quality of Service Provisions (P802.1DC) Frame Replication and Elimination (802.1CB-2017) Path Control and Reservation (802.1Qca-2015) Ultra-reliability Per-Stream Filtering and Policing (802.1Qci-2017) Reliability for Time and Sync (802.1AS-2020) Stream Reservation Protocol (SRP) (802.1Qat-2010) SRP Enhancements and Performance Improvements (802.1Qcc-2018) Basic YANG Data Model (802.1Qcp-2018) Link-local Registration Protocol (P802.1CS) Resource Allocation Protocol (P802.1Qdd) TSN Configuration Enhancements (P802.1Qdj) Dedicated resources, models, and application pro- LLDPv2 for Multiframe Data Units (P802.1ABdh) gramming interfaces YANG for Connectivity Fault Management (CFM) (802.1Qcx-2020) YANG for LLDP (P802.1ABcu) YANG for Qbv, Qbu, and Qci (P802.1Qcw) YANG and MIB for FRER (P802.1CBcv) Extended Stream Identification (P802.1CBdb) YANG Data Model for 802.1AS (P802.1ASdn) You have previously seen that some applications require a common understanding of time across interconnected network devices to function properly. Similarly, a network designed to deliver de- terministic behavior may also require time alignment to behave correctly. This situation would nor- mally be addressed by applying a PTP-based solution. The problem with IEEE 1588 is that it describes numerous loosely defined parameters and deploy- ment options. One could describe 1588 as only outlining what is possible for you to do, rather than what you should do. This lack of strict definition can impact hardware and software choices and in- creases the chances of incompatibility in deployment. For these reasons, TSN specified a profile that uses applicable PTP technology in the context of IEEE Std 802.1Q over full-duplex Ethernet links (some other transport types are also included). The TSN TG published the IEEE 802.1AS-2011 profile with the title of "Timing