This course provides the broad view of network architecture and protocol at local area network and metropolitan area network (LAN/MAN). We focus on design concept of LAN/MAN with a user and operator viewpoints (e.g., cost, complexity, and performance). Topics include all the IEEE 802.x series including 802.3x (Ethernet), 802.11x (Wireless), 802.15 (Cable), 802.16x (Wibro/WiMax), 802.17 (RPR), 802.21 (MIH), etc. In addition, a virtual private network (VPN) and passive optical network (PON) are investigated.