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Birkenstock Sandals MIB databases in extract useful
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by mark abstraction, by using the SNMP protocol can easily get routing device's routing table information. In this way, so long as the data set out, arrive from the provisions of the routing table the next-hop router repeated executions until the destination, we can find IP routing layer of network topology. Second, the topological structure of the Internet As is Birkenstock known to all, the Internet is composed of many subnet interconnection and become, and layer management. The first layer is Internet backbone, by the core gateway interconnection and become, The next layer is by each autonomous systems include the subnet composition. Various subnets through their respective gateway with other subnet communication, these subnets can be a LAN, also can be Birkenstock Shoes a LAN in the subnetwork, they are connected to a gateway ports; gateways can and a subnet connected port, also can and other gateway connected. When subnet one machine to send data, packet first to arrive at the default gateway subnet, default gateway inspect packets the destination address, according to its routing table judging whether the information in the destination Birkenstock Outlet address with his connected subnet, if it is, it puts the packet transmission to the destination, or according to the routing table forwarding prescribed next gateways. So next gateways do similar treatment, repeating the process, packet will finally arrive at the destination address. Based on SNMP protocol network topology discovery mainly through some algorithm, using SNMP protocol from network equipment Birkenstock Sandals MIB databases in extract useful information to complete network topology discovery. Use the SNMP problems is that not all the network node (such as: has not been management switches) has realized the SNMP, or network nodes in topology discovery when closed. Therefore, only by SNMP and cannot be found all the network nodes, we also need to obtain the data Birkenstock Clogs processing SNMP topology of detailed information, especially in the data link layer of network equipment. Below will show the layered network topology discovery process. Third, based on routing topology discovery methods to analyze the shroud The algorithm of node replace a router, this algorithm can achieve topological structure of the network layer traverse. TCP/IP based Internet is by the whole Birkenstocks world, thousands of network interconnection and become, meanwhile the core equipment of is router. Today's mainstream routing devices are provided for the SNMP support, so the network layer topology discovery, mainly is based on SNMP protocol routing table way found backbone routers, routing tables are the important information, network management from routing table to extract the topology of the network, Birkenstocks Shoes and the relevant information MIB provides access to the routing tables method. Routing tables stored about possible purpose network nodes and how to arrive at the destination network node information, each machine host and routers it all for data submitted to select routing, so they have IP routing table. Routing table contains is the destination address and not host specific birkenstock sandal address, so can greatly reduce the size of routing tables, improve the efficiency of routing and the host specific information within the host circulate the specific environment. A routing table contains a series of (N, R) sequence, where the N representative occasionally purpose of network network addresses, R arrive network N path fluctuation a should pass the router IP address,
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