Concept:
An Internet Service Provider (ISP) is a company or organization that provides users with access to the Internet. ISPs offer various services such as internet connectivity, e-mail services, web hosting and broadband or fiber connections.
Examples of ISPs in India include:
• JioFiber
• Airtel Xstream Fiber
• BSNL
• ACT Fibernet
Step 1: Understand the role of an ISP.
An ISP enables users to connect their computers or mobile devices to the Internet.
It provides:
• Broadband and fiber connections.
• Mobile internet services.
• Wi-Fi connectivity.
• E-mail and other internet-related services.
Therefore,
\[
\boxed{\text{ISP = Internet Service Provider}}
\]
Step 2: Analyse the given options.
• Internet Service Provider -- Correct.
• Internet Socket Point -- Incorrect; no such standard networking term.
• Internet Session Protocol -- Incorrect; not the expansion of ISP.
• Internet Session Program -- Incorrect.
Step 3: How does an ISP work?
The process is:
\[
\boxed{\text{User Device} \rightarrow \text{Modem/Router} \rightarrow \text{ISP} \rightarrow \text{Internet}}
\]
The ISP assigns an IP address and provides access to websites, online services and communication networks.
Step 4: Final conclusion.
Hence, ISP stands for:
\[
\boxed{\text{Internet Service Provider}}
\]