CCNA Exam Topic: Design an IP addressing

CCNA IP ADDRESSING


3Com Understanding IP Addressing
-cidr/vlsm, good primer on ip addressing with workbook.

Angry IP Scanner
-scans ip ranges, handy util

Subnet Zero and All-Ones Subnet

Using 31-bit Prefixes on Ipv4 Point-to-Point Links RFC 3021
Subnet Spreadsheet