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2014-06-03 19:37:48

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    • author "me"
    • tags ""
    • folders ""
    • description ""
    • fileName "block5.7"
    • what does layer 3 switching refer to
    • a class of high-performance switching routers optimized for compus area network
  1. what caused the introduction of layer 3 switching
    bottlenecks caused by routers
  2. what does CRC stand for
    cyclic redundancy check
  3. what does FCS stand for
    frame check sequence
  4. what does pps stand for
    packet per second
  5. what does ASIC stand for
    application specific integrated circuits
  6. what are the two basic types of layer 3 switching
    • packet-by-packet routing
    • flow-based packet routing
  7. what is used in layer 3 switches, just like routers, to populate these layer 3 routing tables
    dynamic routing protocol
  8. what four changes in network topologies cause routing tables to automatically adjust themselves
    • link failures
    • device failures
    • additions to the network
    • deletions from the network
  9. what does PIM stand for
    protocol independent multicast
  10. what operates independent of the unicast routing protocols
  11. what is packet-by-packet routing
    Packet-by-Packet Routing is a high performance implementation of standard routing functions.
  12. what does flow-based routing
    Flow-based Routing is a proprietary implementation that relies on short-cutting the router function when forwarding packets over the network.
  13. what is the multi layer switch protocol of choice
    is the Protocol Independent Multicast (PIM).
  14. what does EIGRP stand for
    enhanced interior gateway routing protocol
  15. what term is used by Cisco to describe the category of routing protocols in which EIGRP resides
    balanced hybrid
  16. what multicast address is used by EIGRP
  17. how often are EIGRP hello packets sent across ethernet
    • multicast every 5 seconds
    • unicast every 60 seconds
  18. what are the three tables used by EIGRP
    • EIGRP neighbor table
    • EIGRP topology table
    • routing table
  19. what are the five components of the EIGRP composite metric
    • bandwidth
    • delay
    • load
    • reliability
    • MTU
  20. what two components are used by default in the EIGRP composite metric
    • bandwidth
    • delay
  21. what is the name of an EIGRP best or "primary" route
    • successor
    • the routes with the lowest metric becomes the best or "primary" route and added to the routing table
  22. what does the acronym DUAL stand for
    diffusing update algorithm
  23. what does the acronym OSPF stand for
    open shortest path first
  24. what category of routing protocol is OSPF
    IP routing protocol
  25. what multicast addresses are used by OSPF
  26. what metric is used by OSPF
    cost (based on bandwidth)
  27. what does the acronym LSA stand for
    link-state advertisements
  28. what area must all OSPF areas maintain a direct connection with
    area 0 (backbone area)
  29. what does the acronym ABR stand for
    area border router
  30. what does AS stand for
    autonomous system
  31. what does IGT stand for
    interior gateway protocol
  32. how many hops (routers) does a RIP network considered unreachable
    spans more than 15 hops (15 routers)
  33. what is area border router ABR
    The Area Border Router (ABR) maintains topology databases for every Area that an interface is connected to.
  34. what OSPF features are included to improve performance in large networks
    • (1) Designated Router (DR) Election
    • (2) Backup Designated Router (BDR) Election
    • (3) DR other Assignment
  35. what does DR stand for
    Designated Router
  36. what does BDR stand for
    Backup Designated Router (BDR
  37. what other variants of the "stub area" does OSPF provide
    • Totally Stubby
    • Not-So-Stubby
    • Totally, Not-So-Stubby