maintenance is the answer
1. An organisation that maintains a gateway to the internet and rent access to customers on a per use of subscription basis is called INTERNET SERVICE PROVIDER [ISP]. Internet service providers are of various forms, it can be commercially or privately owned, it can also be owned by a community. The internet access provided by ISP can be inform of cable, DSL or dial up. ISP provide other services such as website building and virtual hosting.
2. Internet protocol [IP] refers to a set of rules that guide the format of data sent over the internet, it is the method by which data is sent over the internet from one computer to another computer. Each computer that is linked to the internet has a unique IP address by which it is identified and distinguished from all other computers on the internet.
A, because normally that would be a requirment
Some of the disadvantages of using layered protocols are the redundancy and overall lower performance.
Reimplementing everything from remote and wired to connectionless and association situated application correspondence, with each ringer and shriek of BGP, MPLS, multicast steering and so on would be a gigantic endeavor and potentially unmanageable in this solid across the board convention. I could envision specialty utilize situations where most extreme execution is imperative most importantly where an exceptionally basic framework might be wanted.
