Hardware networking is basically what is the basic in computer. All things you see are interconnected with cables or wirelessly.
Networking devices may include gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters; and may also include hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address etc. Networking hardware, also known as network equipment or computer networking devices, are physical devices which are required for communication and interaction between devices on a computer network
Networking Hardware are physical equipments that are required to setup a network like NIC or LAN or Ethernet card, Media (Wired or Wireless) and Networking devices (Hubs, Switches, Modems, Routers etc.).