The following summarizes how networks, subnetworks and hosts are identified in the TCP/IP protocol. An IP address is first divided between networks and hosts. The host bits are further divided between ...

Jeff Doyle, author of the Routing TCP/IP, one of Cisco Press’ best-selling books, is blogging at Cisco Subnet for May. Routing TCP/IP is renowned as a must-have resource for network managers ...

One of the most prevalent problems with IP networks occurs when IP subnet masks are incorrect. This seems to happen frequently because the concept of the subnet mask is not understood accurately. In ...

Broadcast and video production systems are moving rapidly into the IP realm. Therefore, understanding IP basics is now part of the engineer’s toolkit. To understand how IP works, we need to start with ...

We are delighted to welcome back Jeff Doyle, author of the network manager’s bible, Routing TCP/IP, and an IP networking consultant, as a regular Cisco Subnet blogger. The Jeff Doyle on IP Routing ...