Computers use communication protocols, which are sets of rules, to transmit data over physical or wireless networks. 

Computer networking allows devices to be connected to each other on a local area network (LAN) or to a larger network, like the internet. 

Computer networking is essential for businesses, consumers, and service providers to share resources, communicate, and offer services. It’s used for many things, including text messaging, telephone calls, streaming video, and the internet of things (IoT). 

Computer networking professionals design, manage, and maintain networks. They keep up with technology trends and adapt networks to meet current needs. 

Some challenges in computer networking include:

• Scaling hardware and software to high speeds 
• Interacting with users effectively 
• Protecting privacy and security 
• Meeting the growing demand for wireless 
• Scaling the number of participants 
• Maintaining healthy internet economics