Final answer:
The three popular applications of data communications networks in both business and personal use are email communication, social media networking, and online banking, collectively embraced in the option 'd) All of the above'.
Step-by-step explanation:
The applications of data communications networks are vast and integrated into both business and personal aspects of our lives. When looking at popular applications, one can easily see how email communication, social media networking, and online banking form the backbone of daily digital interactions. Email has evolved into a fundamental tool for professional and personal exchanges, while social media platforms like F, T, and I offer a space for social interactions and connections for individuals and businesses alike. Online banking has significantly simplified financial transactions, enabling people to manage their finances from anywhere in the world.
All three applications highlight the transformative impact of the internet and digital communication technologies. The early stages of computer networking in the 1980s might have had limited capabilities, but today's networks have profoundly influenced global culture, economy, and societal dynamics. The correct answer to the question of what are three popular applications of data communications networks in business and personal use is d) All of the above, as it encompasses email, social media, and online banking as integral components of modern communication and transactions.