IPTV is an acronym for Internet Protocol television through which internet television services are delivered using the architecture and networking methods of the Internet Protocol Suite over a packet-switched network infrastructure, e.g., the Internet and broadband Internet access networks, instead of being delivered through traditional radio frequency broadcast, satellite signal, and cable television (CATV) formats.
In Simple words It is a service where digital cable network is delivered over internet networks rather than on cable or satellite Television.
IPTV services may be classified into three main groups:
a) Live television,
b) Time-shifted programming, and
c) Video on demand.