Effective Realization of QoS , Network Scalability in Term of Network Security Using Symmetric Algorithm

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Computer networks able to support multimedia applications with diverse QoS performance requirements are evolving. To ensure that multimedia applications will be guaranteed the required QoS, Presently, there are various kinds of networks; wired and wireless that co-exists with each other. These networks have QoS characteristics that are drastically different and whose degree of variability of the different QoS parameters, such as bandwidth, delay and jitter, differ considerably. There are different network design properties may result in congestion even with network of unlimited bandwidth.