A computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information. wikipedia.org

Voice over IP (VoIP, abbreviation of voice over Internet Protocol) commonly refers to the communication protocols, technologies, methodologies, and transmission techniques involved in the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. wikipedia.org

A local area network (LAN) is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media. wikipedia.org

Customer service is the provision of service to customers before, during and after a purchase. wikipedia.org

Salesforce.com Inc. is a global cloud computing company headquartered in San Francisco, California. wikipedia.org

TeamViewer is a proprietary computer software package for remote control, desktop sharing, online meetings, web conferencing and file transfer between computers. The software operates with the Microsoft Windows, Mac OS X, Linux, iOS, and Android operating systems.

Hardware troubleshooting is troubleshooting applied to computer hardware. Troubleshooting is a form of problem solving, often applied to repair failed products or processes. wikipedia.org

Electronic commerce, commonly known as e-commerce refers to the buying and selling of products or services over electronic systems such as the Internet and other computer networks.

Rescue enables remote support for PCs, Macs and Smartphones. wikipedia.org