VPN uses public networks like the Internet to provide secure remote access to an organization's private network. TCP/IP was developed by the Department of Defense to connect different computer networks and provides basic routing and recovery from failures. WPA and WPA2 were developed to improve security over the previous WEP standard for wireless networks.

1. How Encryption for Strong
Security Works
● VPN
● Wi-Fi Protected Access
● TCP/IP
● Ethernet Packets and Protocols

2. VPN
A virtual private network (VPN) is a computer network
that uses a public telecommunication infrastructure such
as the Internet to provide remote off ces or individual
i
users with secure access to their organization's network.
It aims to avoid an expensive system of owned or leased
lines that can be used by only one organization.

3. TCP/IP
TCP and IP were developed by a Department of Defense research project to
connect a number different networks designed by different vendors into a
network of networks. It was initially successful because it delivered a few basic
services that everyone needs across a very large number of client and server
systems. Several computers in a small department can use TCP/IP on a single
LAN. The IP component provides routing from the department to the enterprise
network, then to regional networks, and finally to the global Internet. On the
battlefield a communications network will sustain damage, so the DOD designed
TCP/IP to be robust and automatically recover from any node or phone line
failure. This design allows the construction of very large networks with less
central management. However, because of the automatic recovery, network
problems can go undiagnosed and uncorrected for long periods of time.

4. Ethernet Packets and Protocols
Ethernet is the most popular LAN
technology in the world. It is an easy,
relatively inexpensive way to provide high-
performance networking to all different types
of computer equipment.

5. Wi-Fi Protected Access
Wi-Fi Protected Access (WPA) and Wi-Fi Protected
Access II (WPA2) are two security protocols and security
certif cation programs developed by the Wi-Fi Alliance to
i
secure wireless computer networks. The Alliance def ned
i
these in response to serious weaknesses researchers had
found in the previous system, WEP

6. ● Wikipedia
● Wikipedia
● http://www.yale.edu/pclt/COMM/TCPIP.HTM
● http://www.wildpackets.com/resources/compen
dium/ethernet/ethernet_packets