Virtual Private Networks (VPNs) create secure connections over public networks from "summary" of Data Communications and Networking by Behrouz A. Forouzan
Virtual Private Networks (VPNs) utilize encryption and tunneling techniques to create secure connections over public networks. Encryption involves encoding data in such a way that only authorized parties can access and decipher it. By encrypting data before it is transmitted over a public network, VPNs ensure that sensitive information remains confidential and secure. Tunneling, on the other hand, involves encapsulating data within another data packet as it travels from the sender to the receiver. This creates a secure "tunnel" through which data can pass safely, protecting it from potential eavesdroppers or hackers. Additionally, VPNs use authentication mechanisms to verify the identities of users before allowing them access to the network. One of the key advantages of VPNs is their ability to provide secure communication over untrusted networks, such as the Internet. This is particularly important for organizations that need to transmit sensitive data between remote locations or employees working from home. By using VPNs, these organizations can ensure that their data remains secure and protected from unauthorized access. Furthermore, VPNs are cost-effective solutions for connecting geographically dispersed sites, as they eliminate the need for dedicated private networks or leased lines. This makes them an attractive option for businesses looking to expand their network infrastructure without incurring significant costs.- VPNs play a crucial role in ensuring the security and privacy of data transmitted over public networks. By combining encryption, tunneling, and authentication techniques, VPNs create secure connections that allow organizations to communicate and collaborate effectively while maintaining the confidentiality of their information.
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