This document provides an introduction and summary of IP networks, the internet, intranets, and how companies use networks. It discusses internet service providers, the TCP/IP protocol, IP addresses, internet services like the world wide web and proxy servers, and basic network construction including local area networks, wide area networks, and wireless networks. The document is divided into sections covering these topics and is copyrighted material from an IT networking company.

1. KCGIITnetworking e-LearningKeisuke Maruuchi1course1:IP network guideCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved.

2. IntroductionSummary of the Internet / IntranetCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved. 2

3. ・ With The internet・ Internet service provider・ Internet use service・ With the intranet・ With the extranetSummary of the Internet/IntranetCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved. 3

4. ・ TCP/IP protocol・ IP protocol・ IP addressTCP/IP protocolCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved. 4

5. ・WWW・ Proxy server・ DNSInternet serviceCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved. 5

6. ・ Ethernet LAN・ With the WLAN・ With the LAN・ With the WAN・Simple network constructionCompany use networkCopyright © 2011 ITnetworkingCo.,Ltd All Rights Reserved. 6