What is a second-level domain (SLD)?
Located immediately to the left of the dot (" . "), the second-level domain
is the readable part of the domain name. The registrant defines the
second-level domain. It typically refers to the organization or entity
associated with the IP address. For example, in www.cnn.com "cnn" is a
Second-level domains can be divided into further domain levels. For example:
www.sportsillustrated.cnn.com. These sub domains sometimes represent
different computer servers within departments. More than one second-level
domain name can be used for the same IP address.
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