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Most of the hybrid wireless sensor networks MAC protocols are based on conventional Carrier Sense Multiple Access (CSMA) wireless protocols. Z-MAC is an efficient hybrid protocol which alternates between CSMA and TDMA. It utilizes CSMA in low channel contention and switch to TDMA mode in high channel contention. In this paper, we show that Z-MAC does not perform well under high traffic load. It also...
Emergence of peer-to-peer (P2P) networks has provided a new dimension to overlay networks. People can help each other by sharing the contents of which other people may not have strength to purchase. Besides these generous peers, there are some other peers who always try to harm the network by providing harmful data or just block the activities with invalid responses and dropping lookup queries to...
Businesses attract different types of attacks mostly due to the financial benefits associated with gaining unauthorized access. As a first step to launching attacks, attackers scan production networks looking for open services and vulnerable software. These scanning or enumeration activities, if monitored properly, can be used as early warning systems against a much sophisticated and dedicated attack...
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