This allows the user to uncover the IP address behind a domain name, such as Ping plotting Plot response times for any domain/IP address over a period of time.This allows the user to easily compare previous data which in turn makes it quicker to locate network problems.
 Starting in Gecko 5.0 (Firefox 5.0 / Thunderbird 5.0 / Sea Monkey 2.2), empty maps are no longer skipped over in favor of non-empty ones when matching when in quirks mode.
In HTML and XHTML, an image map is a list of coordinates relating to a specific image, created in order to hyperlink areas of the image to different destinations (as opposed to a normal image link, in which the entire area of the image links to a single destination).
The HTML code for this type of server-side image map requires the When the user clicks inside the image the browser will append the X and Y coordinates (relative to the upper-left corner of the image) to the anchor URL as a query string and will access the resulting URL then the query string must not be added to the anchor URL and the server should respond appropriately (for example, by returning a text-only navigation page).
Client-side image maps were introduced in HTML 3.2, and do not require any special logic to be executed on the server (they are fully client-side). A client-side imagemap in HTML consists of two parts: A more modern approach is to overlay links on an image using CSS absolute positioning; however, this only supports rectangular clickable areas.
Server-side image maps enable the web browser to send positional information to the server about where the user clicks within an image.
This allows the server to make pixel-by-pixel decisions about what content to return in response (possible methods are to use image mask layers, database queries, or configuration files on the server).
This prevents packets from endlessly looping around the Internet, never finding their destination.
Traceroute Key diagnostic data such as packet loss and response times are displayed in an easy to understand traceroute table.
Every time a host forwards a packet, it decrements the TTL value of the packet by one.