  IPv4 which is the old version of Internet Protocol has a new successor named
IP Next Generation (IPng) or IPv6 developed by Internet Engineering Task Force
(IETF). This new version is developed specifically to resolve some issues of
IPv4 like scalability, performance and reliability. Although new version is
ready for usage, it is obvious that it will take years to transit fully from
IPv4 to IPv6. We have to use these two versions together for a long time.
Therefore, we have to investigate and know transition mechanisms that we can
use during transition period to achieve a transition with minimum problem. This
research defines the essential information about compatibility transition
mechanisms between IPv4-IPv6. Dual Stack is one of the IPv4-IPv6 compatible
mechanism by running both IPv4 stack and IPv6 stack in a single node. 6 to 4
tunneling mechanism encrypts IPv6 packets in IPv4 packets to make
communications possible, from IPv6 network over IPv4 network. This has been
configured using GNS3 Simulator and Packet Tracer 6.1. Dual Stack & Tunneling
mechanisms were completely implemented later in this research work. This
research examines transmission latency, throughput and delay from end to end,
through empirical observations of both Dual Stack and tunneling mechanisms.
