secau Security Research Centre, Edith Cowan University, Perth, Western Australia
An abbreviation for Domain Name System, DNS is a system employed for naming computers and network services. This system is organized into a hierarchical scheme of domains. Naming service provided by DNS is used in TCP/IP networks, such as the Internet, to easily locate computers and services like mail exchanger servers, through user-friendly names. When a user enters a DNS name in an application, DNS services resolves this name to other information associated with the name, such as an IP address. This paper presents the evaluation of a DNS server performance in the experimental backgrounds to establish the fact that frequent caching of results will improve the response time of the queries. It also simulates the client –server DNS model on OPNET. It thus proposes a performance-enhancing model for its better throughput keeping in mind, the various execution measures of DNS server like parallel requests, traffic distribution and least response time, which were tested on the DNS server.