1.1 What is the protocol
A protocol defined between two or more communication entities exchanging packet format and order , and packet transmission, reception, or other aspects of the actions taken
1.2.2 Access Network
DSL Digital Subscriber Line (ISP is established between the home and the point to point connection, a dedicated broadband)
of HFC Hybrid Fiber Coax (shared broadband)
Ethernet uses twisted-pair copper or coaxial cable, some end systems connected to each other, and connected to the edge router. Edge router is responsible for routing packets destined for this is no longer the LAN . And HFC Similarly, a shared-medium Ethernet, so LAN end systems to share the transmission rate. However, the use of switched star topology Ethernet technology allows the host directly and " switch coupled", to allow all hosts to send and receive the full rate LAN.
Wireless network
1, wireless local area wireless subscriber station located within a radius of several tens of meters (also called a wireless access point) between the transmit and receive packets. These base stations are typically connected to the wired Internet. E.g. wifi is based on IEEE 802.11 wireless LAN technology (also known as wireless Ethernet).
2, the radio access network, a wide area packet via the cellular phone, the connection to the wireless infrastructure, telecommunications providers managed by the base station, several users within a radius of ten thousand meters provide access services.