Co-Packaged Optics (CPO) is an optoelectronic co-packaging technology that integrates an optical module (responsible for optical signal transmission and reception) and a switch ASIC (responsible for electrical signal processing) into the same physical package. An all-optical Ethernet switch is a network switch whose service ports are entirely optical, meaning every interface uses fiber rather than copper. Port types are limited to two: optical and Ethernet. Ethernet switches connect cabled devices, like computers, Wi-Fi access points, PoE lighting and IoT devices, and servers, in an Ethernet LAN so they can communicate with each other and to the. All-optical Ethernet switches are a type of switch that provides optical uplink and downlink ports, making them an ideal choice for building an all-optical campus network. They can function as core, aggregation, and access devices on campus networks and connect to upstream and downstream devices. Ethernet switches come in various types, including Unmanaged Switches, Managed Switches (Smart and Fully Managed), PoE switches, Layer 2 switches, and Layer 3 switches. Each type offers different levels of control, security features, and management capabilities to suit diverse networking needs. What is Ethernet? By allowing.