1, The full form of NSP is network service provider

A network service provider (NSP) is a business or organization that sells bandwidth or network access by providing direct Internet backbone access to internet service providers and usually access to its network access points (NAPs). For such a reason, network service providers are sometimes referred to as backbone providers or internet providers.

Network service providers may consist of telecommunications companies, data carriers, wireless communications providers, Internet service providers, and cable television operators offering high-speed Internet access. It can also include certain information technology companies such as IBM, DXC Technology, Vanco and Atos Origin.

2, The full form of NSP is network service provider

A network service provider is a DLL that supports a specific network protocol on Microsoft windows system. It also implements the Network Provider API. This enables it to interact with the Windows operating system to receive standard network requests, such as connection or disconnection requests. To handle these requests, the network provider then calls the network-specific API that is appropriate to the network protocol the network provider supports. In other words, the network provider wraps the network-specific functionality in a DLL, which exposes a standard interface to Windows.

Using network providers, Windows can support many different types of network protocols without having to know the network-specific details of each network. This is essential because new network protocols are being developed all the time. With network providers, supporting a new protocol simply requires creating and installing a new network provider.