Introduction A common beginner question is “what is a VPN,” especially when learning how information can be protected while crossing the Internet. A virtual private network, or VPN, creates a logical network over existing network infrastructure and uses security controls to support secure communication. VPNs are relevant when data or control information must travel between … 더 읽기
Introduction to Firewalls The question “what is a firewall?” often arises when people begin learning how computers and networks protect themselves. A firewall is a device or program that controls network traffic flow between networks or hosts with different security postures. In everyday terms, a firewall provides a controlled boundary. It applies a defined policy … 더 읽기
Introduction to Wi-Fi Wi-Fi is a wireless networking technology used by phones, computers, tablets, televisions, printers, and many other compatible devices. It allows these devices to exchange data over a local network without requiring a separate network cable for each connection. Many people use Wi-Fi to reach the internet, but Wi-Fi and the internet are … 더 읽기