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In this paper we compare the performance of two low latency hando protocols for MIPv4, Pre- and Post-Registration Hando. These mechanisms proposed by the IETF aim at improving the performance of Hierarchical Mobile IP with respect to hando latency and packet loss. We propose an analytical model to study the in uence of various system parameters on the performance of the two protocols, followed by a comparison of the two schemes. We describe several hando implementations over a wireless access based on the IEEE 802.11 standard and analyze them by means of an ns simulation. 1