Which of the following is not a protocol for communication within network?

Correct option is B

HTML (HyperText Markup Language) is not a protocol. It is a markup language used for creating web pages and defining their structure and layout. The other options (TCP/IP, HTTP, SMTP) are all protocols that facilitate communication over a network.
Important Key Points:
1. Protocols - Protocols are rules that define how data is transmitted across a network.
2. HTML - A markup language used to design the structure of web pages and provide a layout but does not handle data transfer or communication.
Knowledge Booster:
• TCP/IP: Transmission Control Protocol/Internet Protocol is a suite of communication protocols used for transmitting data over the internet. It is the foundation of internet and network communications.
• HTTP: HyperText Transfer Protocol is used for transferring web pages over the internet. It defines how messages are formatted and transmitted between servers and clients.
• SMTP: Simple Mail Transfer Protocol is used for sending emails over a network. It helps in communication between email clients and servers.