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| The part of a network that a that acts as the primary path for traffic that is most often sourced from, and destined for, other netwroks. |
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| Backup designated router- |
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| designated router- The designated router enables a reduction in the number of adjacencies required on a multiaccess network, which reduces the amount of routing protocol traffic and the topological database's size. |
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| Process that sends information out all ports, wth the exception of the port on which the information was received. |
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| Protocol used by OSPF systems to establish and maintain neighbors. |
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| A special IP number designated for a machine's software loopback interface. The loopback interface has no hardware associated with it and is not physically connected to a network. |
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| Link-state adverstisement. Broadcast packet used by link-state protocols that contains information about neighbors and path costs. Receiving routers use LSAs to maintain their routing tables. |
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| Network that allows multiple devices to connect and communicate simultaneously. |
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| communication between one receiver and one location. |
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| Process identifier. A numerical number assigned during the OSPF configuartion process that identifies eash OSPF process running on a router. |
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| Router Identifier. Ip address that identifies a router participating in OSPF. The router ID is taken from the active interface with the highest IP address, or from a configured loopback interface. |
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Definition
| A program and device that monitors data traveing over a network. |
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