The computer must stillAND the IP address against the custom subnet mask to see what the network portion is and In this example each range has 14 usable addresses in it. A custom subnet mask borrows bits from the host portion of theaddress to create a subnetwork address between the network and host portions of an IPĪddress. This can only be accomplished by usingĪ custom subnet mask.
World still sees the network as 192.100.10.0, but the internal computers and routers see fivesmaller subnetworks. In order for you computer to get the same information it must AND the IP address withthe subnet mask in binary.ĪNDING with the default subnet mask allows your computer to figure out the networkportion of the address.ġ 1 0 0 0 0 0 0. Unfortunately your computer doesn’t think that way.įor your computer to determine the network and subnet portion of an IP address it must“AND” the IP address with the subnet mask.Īddress Class:Network Portion: C 192. By now you should be able to lookat an IP address and tell what class it is. Using the IP address and subnet mask shown write out the host address:Įvery IP address must be accompanied by a subnet mask. Using the IP address and subnet mask shown write out the network address:
It also discourages others myself included, from posting high quality materials. Yes, students look for answers this way.Instructors (and anyone else for that matter) please do not post the Instructors version on public websites.
When you do this you are giving everyone else worldwide the answers. VLSM Variable-Length Subnet Mask IWorkbooks IP Addressing and Subnetting WorkbooksACLs - Access Lists Workbooks Produced by: Robb County Career & Technology CenterCisco Networking Academyįrederick County Public SchoolsFrederick, Maryland, USAįor taking the time to check this workbook for errors,Special Thanks to Melvin Baker and Jim DorschĪnd to everyone who has sent in suggestions to improve the series.
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