TAILIEUCHUNG - Scalable voip mobility intedration and deployment- P13

Scalable voip mobility intedration and deployment- P13: The term voice mobility can mean a number of different things to different people. Two words that can be quite trendy by themselves, but stuck together as if forgotten at a bus station long past the last ride of the night, the phrase rings a number of different, and at times discordant, bells. | 120 Chapter 5 layered and virtualized and being heavily involved in the various standards bodies for the industry and having authored or contributed to a number of the techniques necessary for voice over Wi-Fi I have a strong interest in certain problems in wireless that may have a solution in the techniques I helped create. But I mention those problems and solutions in sincere belief that the problems of voice mobility that you may experience and of wireless networking in general can be solved. In any event I will not pull any punches and will address strategies for every architecture you may happen to run across in modern networks. Wireline Standalone or Fat Historically this was the first wireline architecture for wireless. In a standalone AP network each access point is entirely independent of the others. In the consumer space only standalone access points are sold today. However the first enterprise-grade access points also fell into this style. Each access point has its own management system whether simple or complex web-based or command line interface CLI . The access points each maintain their own configurations connect to outside services especially Remote Authentication Dial In User Service or RADIUS on their own and generally have no cooperation with any neighboring access point even from the same vendor. Most important for mobility each access point is its own bridge connecting to the wired network immediately at its Ethernet port without any tunneling. This means that the access point offers very few or no mobility services. If two access points are connected in different subnets then the client is required to get a new IP address after a handoff usually resulting in a dropped call. To avoid this effect administrators are forced to distribute the subnet to every access point for multiple-Virtual LAN VLAN networks this means that each access point must be trunked back across the access and distribution layers of the wired network. These access .

• Phần cứng
• lắp ráp máy tính
• sửa chữa máy tính
• sổ tay phần cứng
• MainBoard
• thiết bị máy tính
• thiết bị mạng
• Lắp ráp bảo trì máy tính
• Lắp ráp bảo trì máy tính phần 2
• Cài đặt phần mềm cho máy tính
• Bảo trì máy tính
• Cài đặt máy tính
• Phần cứng máy tính
• lỗi máy tính
• hệ thống mạch máy tính
• điện máy tính
• Tài liệu máy tính