中国电信全国各地vpivci及dns值(转载)（China Telecom vpivci and DNS values across the country (Reprinted)）.docVIP

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中国电信全国各地vpivci及dns值(转载)（China Telecom vpivci and DNS values across the country (Reprinted)）.doc

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中国电信全国各地vpivci及dns值(转载)（China Telecom vpivci and DNS values across the country (Reprinted)）

中国电信全国各地vpivci及dns值(转载)（China Telecom vpivci and DNS values across the country (Reprinted)） 1. what VPI, the introduction of VCIATM technology in the virtual path VC (Virtual Channel) concept, refers to the one-way communication ability of ADTM cells, similar to the concept of virtual circuit packet switching. Virtual path is a general concept, and its associated two concept of reality is virtual path link and virtual channel connection VCC (Virtual Channel Connection). Virtual path link is a one-way communication ability of ATM cell transfer of two adjacent ATM entities, with a VCI (VCIdentffiet) to identify. As a comprehensive communication network B-ISDN is a large type, a variety of communication services to support multiple users on the terminal. Therefore, especially the virtual path is the rate range will in the network to manage the virtual path in high speed environment, very difficult. To this end, introduces the classification method, i.e. multiple virtual path composed of virtual channel VP (Virtual Path). Similar to VC, VP link and VPC two concept. The VP link is a VC link beam having the same endpoint, VP link level even consisting of VPC, VP link with VPI to identify. Obviously, with different VPI, the same VCI two connection is different. VPI (Virtual Path Identifier virtual path identifier) VCI (Virtual Channel Identifier virtual channel identifier) VCI, VPI DSLAM ATM (ADSL line terminal identification of each sign). PVC is a technology implementation of remote management of ADSL terminal technology for remote terminal management! Based on the PVC management channel and SNMP/HTTP management protocol under PVC channel management is divided into two, one is the basic channel of PVC, the other one is to extend the PVC channel. Office equipment and user terminal equipment support VPI=0 VCI=16 PVC connection as the basic PVC management channel. The basic PVC channel as the initial channel bureau end and user end equipment. Extended PVC channel based on b