Which two layers are Cisco Unified Communications component layers? (Choose two.)

The infrastructure layer represents the physical and logical network components - routers, switches, gateways, and WAN links - that transport all UC traffic. It is one of the two primary component layers in the Cisco UC architectural framework and serves as the foundation upon which all UC services operate.

The data link layer is Layer 2 of the OSI reference model responsible for node-to-node frame delivery, not a named component layer in the Cisco UC architecture.

The network layer is Layer 3 of the OSI reference model responsible for logical addressing and routing, not a defined component layer in the Cisco UC architecture.

The endpoints layer encompasses all user-facing devices that consume UC services, including IP phones, video endpoints, softphones, and collaboration clients. It is the other primary component layer in the Cisco UC architecture model and represents where UC capabilities are delivered directly to end users.

The transport layer is Layer 4 of the OSI reference model responsible for end-to-end segment delivery, not a named component layer in the Cisco UC architecture.