The most current data communications text on the market, this comprehensive book uses a unique modular approach. Most teachers will want to cover the material in the 12 core chapters. This will leave time for hands-on work or additional conceptual material. The 8 advanced modules have extra material that some teachers will wish to cover depending on their particular course goals. Companion Website offers even more material. This approach allows selective emphasis without requiring the teacher to assemble his or her own additional material.