It stands for United States. Usually this means the American english version of the site.
network
Resource Locator
it is tha domain name
it stands for school (or college), usually like in a schools website
it indicates an academic institution,unversity
The Country Code Top Level Domain (ccTLD) for Ireland is .ie.
Deutschland. When you see "de", that means the web site is hosted by a German service provider.
URL stands for Universal Resource Locator.
PLACE
One can find the correct URL of Yahoo Mail by visiting the Yahoo website where they have links to their email service. In the US it will end with 'com' while in the UK it will end with 'co.uk'.
.biz is intended for domains used by businesses. e.g. http://www.website.bizhttp://en.wikipedia.org/wiki/.biz
Uniform Resource Locator