Abstract
In this paper, we investigate the comparative access behavior of human visitors and automatic software agents i.e. web robots through access logs of a web portal. We perform an exhaustive investigation on the various resources acquisition trends, hourly activities, entry and exit patterns, geographic analysis of their origin, user agents and the distribution of response sizes and response codes by human visitors and web robots. Gradually web robots are continuing to proliferate and grow in sophistication for non-malicious and malicious reasons. An important share of web traffic is credited to robots and this fraction is likely to cultivate over time. Presence of web robots access traffic entries in web server log repositories imposes a great challenge to extract meaningful knowledge about browsing behavior of actual visitors. This knowledge is useful for enhancement of services for more satisfaction of genuine visitors or optimization of server resources.
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