Where customers with different membership and position, use computers as in the university network systems, it often takes much time and efforts for them to cope with the change of the system management. This is because the requirements for the respective computer usage are different in the network and security policies. In this paper, a new destination addressing control system (DACS) scheme for the university network services is proposed. The DACS Scheme performs the network services efficiently through the communication management of a client. As the characteristic of DACS Scheme, only the setup modification is required by a system administrator, when the configuration change is needed in the network server. Then, the setup modification is unnecessary by a customer, which shows a merit for both a system administrator and a customer. This paper describes the instruction and the prototype for DACS Protocol as the implementation of DACS Scheme. Then, the simplicity of the system management in DACS Scheme, is examined from the customer and the system administrator viewpoints.

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Simulation of Vehicular Ad hoc Networks is an important aspect of the analysis and design of intelligent routing and broadcasting protocols. In this regard, we propose a lightweight simulator, which separates the mobility model of the vehicles from the details of communication protocols.The mobility model is written in a high-level computing language, and the movement trace of nodes can be exported in a format compatible with standard network simulators. As a proof of concept, by means of extensive simulations, we review the properties of the generated mobility trace by measuring some parameters of interest, such as the average velocity. We show that, in general, the average velocity is a long-range dependent variable, and this fact poses some doubts on how to set the length of the simulation. Accordingly, we discuss the problem of transient data and stationarity, which is well understood only in the deterministic case.

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