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Virtual Private Network (VPN) adds the features of both public and private networks. It is fixed to single organization and needs public network for connectivity.
These connections are sometimes known tunnels and connect sites. Every site sees tunnel as point-to-point link. There is no access for other clients of public networks.
GUARANTEEING ABSOLUTE PRIVACY:
In addition to restricting data packets, VPN machines use encryption to sure absolute privacy. Even if an outside does manage to retain a copy of the data packet the outside will be unable to interpret the message.
What is an Ethernet? The Ethernet topology was developed at the University of Hawaii to connect computers on the many Islands. It was radio based design. Later, Robert Metacalf
IEEE 802.3 frame format
Hierarchy of DNS Servers DNS uses a large number of server organized in hierarchical fashion and distribution around the world. No single DNS server has all of the mappin
Overhead SONET overhead is not added as headers or trailers as we have seen in other protocols. Instead SONET insert overhead at a variety of location in middle of the f
The Internet Layer The internet layer is responsible for routing the data packets to the appropriate destination. Internet protocol (IP) is responsible for ensuring dat
User Datagram Protocol - UDP is a connectionless oriented transport protocol for use when the upper layers give error-recovery and reliability. UDP does not sequence data or re-ass
What is the advantage of address sharing? By using address translation instead of routing, address sharing gives an inherent security benefit. That's because host PCs on the In
WHAT IS NETWORK???
Error detection and correction The digital traffic stream of second generation systems also lends itself to the use of error detection and correction methods. The result can be
what is the differnce between noise and distortion
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