http://f4bregaz.blogspot.com/2008/08/pengertian-subnetting-network-id.htmlhttp://kbudiz.wordpress.com/kuliah/menentukan-network-id-identitas-jaringan/http://kendari.foss-id.web.id/?p=90http://www.comptechdoc.org/independent/networking/terms/network-id.htmlhttp://www.kaskus.us/forumdisplay.php?f=19http://www.comptechdoc.org/independent/networking/http://internetisme.wordpress.com/2011/07/05/protokol-tcpip/http://id.wikipedia.org/wiki/Alamat_IP_versi_4http://ejournal.jak-stik.ac.id/index.php/jakstikjournal/article/viewFile/1026/1157?token=b294d7...