TAILIEUCHUNG - Internetworking with TCP/IP- P43

Internetworking with TCP/IP- P43: TCP/IP has accommodated change well. The basic technology has survived nearly two decades of exponential growth and the associated increases in traffic. The protocols have worked over new high-speed network technologies, and the design has handled applications that could not be imagined in the original design. Of course, the entire protocol suite has not remained static. New protocols have been deployed, and new techniques have been developed to adapt existing protocols to new network technologies | Sec. Overview Of Mobile IP Operation 379 If the mobile moves again it obtains a new secondary address and informs the home agent of its new location. When the mobile returns home it must contact the home agent to deregister meaning that the agent will stop intercepting datagrams. Similarly a mobile can choose to deregister at any time . when leaving a remote location . We said that mobile IP is designed for macroscopic mobility rather than high-speed movement. The reason should be clear overhead. In particular after it moves a mobile must detect that it has moved communicate across the foreign network to obtain a secondary address and then communicate across the internet to its agent at home to arrange forwarding. The point is Because it requires considerable overhead after each move mobile IP is intended for situations in which a host moves infrequently and remains at a given location for a relatively long period of time. Mobile Addressing Details A mobile s primary or home address is assigned and administered by the network administrator of the mobile s home network there is no distinction between an address assigned to a stationary computer and a home address assigned to a mobile computer. Applications on a mobile computer always use the home address. Whenever it connects to a network other than its home a mobile must obtain a temporary address. Known as a care of address the temporary address is never known or used by applications. Instead only IP software on the mobile and agents on the home or foreign networks use the temporary address. A care-of address is administered like any other address on the foreign network and a route to the care-of address is propagated using conventional routing protocols. In practice there are two types of care-of addresses the type used by a mobile visiting a given network is determined by the network s administrator. The two types differ in the method by which the address is obtained and in the entity responsible .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.