Fill in the blanks according to the text. The Internet is used by millions of people every day, so it is very useful and important to know something about the Internet. The Internet is a large system of _______that spans the globe. It is, at a __________level, defined not by the equipment, but by its____________, that is_________. At another level, the Internet is defined by the people who use it. Application protocols developed for and used in TCP/IP include the____________, ___________, and ___________. TCP/IP protocol also introduces the_________, a multipart numeric code used to identify all nodes in the network. An important Internet tool provides a way to link textual information on different computers and it is developed to overcome issues of ___________and utilize a new way of linking called__________.