Smart City Tunneling

Service providers today are constantly seeking to offer multiple services on a single common infrastructure. For instance, it is desirable some times to provide transport services transparently to data traffic encapsulated over different network layers. Tunneling is a technique for encapsulating a packet or frame within another packet of the same or a different network layer. One of the motivations for tunneling is bridging various heterogeneous networks that use different protocols for communication. Tunneling is also used for providing private and secure communications over a publicly shared network this article investigate the interactions between different tunneling technologies in order to provide end to-end virtual connectivity to end clients. Particularly, the article describe the technical details of the implementation of various layer 2 tunneling techniques in order to establish an end-to-end virtual connection service as a concatenation of services offered by the different network domains along the path between end users. Security is the most important factor to be considered while designing a network and lot of research has been done in this field. One of the most effective ways for granting secured access in an organization is use of VPN. VPN is a generic term used as a combination of network topologies/technologies to describe a communication network through the tunnel, otherwise unsecured or not trusted network. VPN transmits data by the means of tunnels. The most important principle in establishing security through VPN tunnel is by providing proper Authentication and data encryption. The proposed method provides advanced encryption and authentication by using MAC address as a key. Whenever a sender wants to send any data through tunnel after establishment of the connection, the MAC address of the receivers device is read by the encryption technique it use it as a key to encrypt data.