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We use OS X 10.5 as our LAN DNS server, all PCs point the DNS to this server. <br />
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Since a few months ago, we noticed the 1st page of the website takes along time to appear, sometimes almost a minute, but clicking on links within the same website is very fast i.e. less than 3 secs. &nbsp;Using the IP address of the website is also faster than using the domain name. <br />
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Our server is not overloaded i.e. CPU utilization less than 5% and we are on Gigabit Ethernet Switch. Our Internet connection is also not congested i.e. ping to industrial strength website is flat and not spikey. <br />
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Any suggestion on what could be the cause? any comments welcomed. 
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We use OS X 10.5 as our LAN DNS server, all PCs point the DNS to this server. 

Since a few months ago, we noticed the 1st page of the website takes along time to appear, sometimes almost a minute, but clicking on links within the same website is very fast i.e. less than 3 secs.  Using the IP address of the website is also faster than using the domain name. 

Our server is not overloaded i.e. CPU utilization less than 5% and we are on Gigabit Ethernet Switch. Our Internet connection is also not congested i.e. ping to industrial strength website is flat and not spikey. 

Any suggestion on what could be the cause? any comments welcomed. 

Slow DNS / slow Internet Explorer loading of website.

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.

Web Browsers

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.