Network services are computer applications that provide data storage, its presentation and communication among other functionalities. Each service is delivered by a server which has been accessed by a network client on the same device or even from another device. Network services are offered by companies known as Network Service Providers (NSP). The Network service Providers offer backbone support to Internet Service Providers (ISP). These are the companies that give us the access to the internet. The Internet Service Provider companies buy network services access from the NSPs and retail them to us, the consumers of the package. The NSP has all the infrastructure to access the network services. ISPs only provide local access numbers to the network users (customers) to access the NSP. The Network service providers also sell other products and services to the ISPs which they use to communicate as well as sell to their customers. These include Email services and even web-hosting. Once acquired, the ISPs brand the products and services and sell them to the consumer. When you want to go online, you use the local access number branded by your ISP to reach the NSP who sold that service to your ISP who processes your requests and renders your feedback through the various network service applications installed on your PC.
Different network services use different techniques to transmit data packages between the server and the user. These data packets are transmitted when you request for something over the internet. A simple task like clicking the “click here” button will transmit data packets to the server from your PC. The transmission may use either a TCP or a UDP depending on various factors. Network service applications are divided into various groups based on their functionality and protocols. These applications facilitate everything over the internet and their collapse would mean the collapse of the internet.