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34 Cards in this Set

  • Front
  • Back
1. Direct Routing
A computer on any physical network can transmit a datagram to any other computer on the same network.
2. Indirect routing
Occurs when the destination is not on a directly attached network
3. Static, Default, Dynamic routing
Three types of indirect routing
4. Routing Tables
Examined by a router to determine how to forward a packet
5. Static Routing
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
6. Stub networks
Networks with only one entry and exit point
7. Default Routes
Are generally used to reduce the size of a routing table by grouping many routing entries into a single default case.
8. Dynamic Routing
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.
9. Routing Loops
The most common form of network management challenges in Dynamic Routing
10. Internet Network Operations Center
Consisted of a small set of powerful core routers operated and maintained by ___
11. Two groups
Routers that connected the various networks composing the internet were divided into __ groups
12. Autonomous system
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
13. Interior Gateway Protocol (IGP)
Routers within a single AS communicate using one of several dynamic routing protocols. Performance is the key requirement of this gateway protocol
14. Exterior Gateway Protocol (EGP)
Communication between routers that belong to different autonomous systems is made possible by this gateway protocol.
15. Dynamic Routing Protocols
used by computer networks to maintain their routing tables and calculate the shortest path to a destination
16. DVA
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
17. LSA
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.
18. Multipath Routing
If the primary route fails, the router can still forward a packet using an alternative route.
19. Flat Router Networks
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
20. Inter-Domain Routing Protocol
what does IRDP stand for?
21. Heirarchical Networks
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.
22. RIP
is a DVA protocol used by TCP/IP and Novell Internetwork Packet Exchange networks
23. 30 seconds
RIP routers send routing updates to adjacent routers every _ seconds
24. Request and Response messages
RIP defines 2 message types ___
25. User Datagram Protocol
RIP routers pass routing updates to and from the __
26. 15 hops
RIP permits a maximum hop count of __ and considers any destination network greater than __ hops away unreachable
27. Holddowns
Used to prevent regular update messages from inappropriately reinstating a route that has gone bad.
28. Split Horizons
Derive from the fact that it is never useful to send information about a route back in the direction where it came from
29. Poison Reverse
Intended to defeat routing loops by "poisoning" the sending route to prevent the update from getting sent back to the sender
30. Update, expiration, flush timer
RIP uses three timers to regulate its performance
31. RIPv2
Created to handle subnetting for RIP
32. Route Tag
Provides a way to distinguish internal RIP routes from external RIP routes
33. Area Border Router
is an OSPF router connected to more than one area
34. Backbone area
Areas are connected to each other by means of this special area