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34 Cards in this Set
- Front
- Back
1. Direct Routing
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A computer on any physical network can transmit a datagram to any other computer on the same network.
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2. Indirect routing
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Occurs when the destination is not on a directly attached network
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3. Static, Default, Dynamic routing
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Three types of indirect routing
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4. Routing Tables
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Examined by a router to determine how to forward a packet
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5. Static Routing
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A network admin must sit down at a router console or Telnet session and enter each destination network and the associated next hop address. They do not operate well in an environment of rapid growth or change
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6. Stub networks
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Networks with only one entry and exit point
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7. Default Routes
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Are generally used to reduce the size of a routing table by grouping many routing entries into a single default case.
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8. Dynamic Routing
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The routing updates use router resources, in the form of increased CPU and memory usage. Allows routers to choose the best of a number of possible routes between networks based on metrics. Responds automatically to changes in the network topology.
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9. Routing Loops
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The most common form of network management challenges in Dynamic Routing
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10. Internet Network Operations Center
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Consisted of a small set of powerful core routers operated and maintained by ___
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11. Two groups
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Routers that connected the various networks composing the internet were divided into __ groups
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12. Autonomous system
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These systems are to be thought of as a single site having multiple networks under its control, and that there are many of them. This is to accomodate the rapid growth rate of the internet
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13. Interior Gateway Protocol (IGP)
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Routers within a single AS communicate using one of several dynamic routing protocols. Performance is the key requirement of this gateway protocol
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14. Exterior Gateway Protocol (EGP)
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Communication between routers that belong to different autonomous systems is made possible by this gateway protocol.
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15. Dynamic Routing Protocols
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used by computer networks to maintain their routing tables and calculate the shortest path to a destination
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16. DVA
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A dynamic routing protocol where a router sends its neighbors a vector of distances or metrics for all possible network destinations. Uses only a small number of CPU cycles to determine the shortest route to a distant network
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17. LSA
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A dynamic routing protocol that has the ability to partition an AS into areas and it must know the entire network topology before computing the path to each destination network.
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18. Multipath Routing
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If the primary route fails, the router can still forward a packet using an alternative route.
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19. Flat Router Networks
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DVAs, used in routing protocols such as RIP and Inter-Domain Routing Protocol create flat networks. Every router performs the same job in the same way
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20. Inter-Domain Routing Protocol
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what does IRDP stand for?
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21. Heirarchical Networks
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Composed of two levels- The routers on level 1 that are for communication within defined areas of the network, and Level 2 that are for higher performance routers called the backbone area.
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22. RIP
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is a DVA protocol used by TCP/IP and Novell Internetwork Packet Exchange networks
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23. 30 seconds
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RIP routers send routing updates to adjacent routers every _ seconds
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24. Request and Response messages
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RIP defines 2 message types ___
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25. User Datagram Protocol
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RIP routers pass routing updates to and from the __
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26. 15 hops
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RIP permits a maximum hop count of __ and considers any destination network greater than __ hops away unreachable
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27. Holddowns
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Used to prevent regular update messages from inappropriately reinstating a route that has gone bad.
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28. Split Horizons
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Derive from the fact that it is never useful to send information about a route back in the direction where it came from
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29. Poison Reverse
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Intended to defeat routing loops by "poisoning" the sending route to prevent the update from getting sent back to the sender
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30. Update, expiration, flush timer
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RIP uses three timers to regulate its performance
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31. RIPv2
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Created to handle subnetting for RIP
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32. Route Tag
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Provides a way to distinguish internal RIP routes from external RIP routes
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33. Area Border Router
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is an OSPF router connected to more than one area
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34. Backbone area
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Areas are connected to each other by means of this special area
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