User:Group3 AK AM MK TK/sandbox

History
We can talk about the beginning of VPNs from the beginning of the 1990s. Software IP Encryption Protocol (SWIPE) was one of the first attempts to provide encrypted IP traffic between devices. It had a great impact on developing IPsec, a protocol of encryption still used today.

IPsec was the first standardised cryptographic protocol suite which was able to guarantee end-to-end security at the IP level. It could secure almost all types of traffic without interfering with any application or protocol. It could be called the root of the private network.

Later on, when it became obvious that data should be encrypted by a VPN both Microsoft and Cisco created their protocols, but in the end collaborated to create an L2TP protocol.

VPNs in mobile environments
Mobile virtual private networks are used in settings where an endpoint of the VPN is not fixed to a single IP address, but instead roams across various networks. Examples of such can be data networks from companies that provide mobile phone services or Wi-Fi access points, the user can safely switch between the networks without dropping the secure VPN session or losing application sessions. Mobile VPNs are widely used in public safety where they provide law-enforcement officers (e.g. police officers, sheriffs, federal agents etc) with safe access to applications such as computer-assisted dispatch and criminal databases. The usage of VPN in other spheres can be applied due to the similar needs, such as field service management requires securely reach schedules and customer information, along with healthcare professionals need to access patient information and health records.

Networking Limitations
A limitation of traditional VPNs is that they are point-to-point connections and do not tend to support broadcast domains; therefore, communication, software, and networking, which are based on layer 2 and broadcast packets, such as NetBIOS used in Windows networking, may not be fully supported as on a local area network. Variants on VPN such as Virtual Private LAN Service (VPLS) and layer 2 tunneling protocols are designed to overcome this limitation.[40]

Furthermore, while VPNs are generally safe for transmitting data over the internet, they aren’t 100% secure and do not constitute a complete cybersecurity strategy. Traditional VPNs can have vulnerabilities in their protocols that cyber attackers could exploit. For instance, even well-regarded protocols such as IPsec and L2TP, which are crucial in preventing data leaks and safeguarding information as it passes through shared or public networks, may have inherent weaknesses that expose them to attacks.