Networks Reference

General

• Wikipedia
  • Wikipedia is good for quick definitions of things.

• In defence of Wikipedia

• Summary of electromagnetic spectrum

• ASCII chars (also here)

Math

• MathWorld is good for quick definitions of things.
  • log

• metric prefixes (and here)

• powers of 2 (also here and here and here)

• Binary / Decimal Converters

Standards

• IEEE
  • IEEE 802.* standards (and here)