CHAPTER 19 TERMS

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Across
  1. 2. AP and client or not on the same channel
  2. 4. when a wave hits a smooth object that is larger than the wave itself, depending on the media the wave may bounce another direction.
  3. 5. the little green light-emitting diode found on both the network interface card and the switch, which indicates that the NIC and switch are making a logical (Data Link layer) connection.
  4. 6. either routers or a routing protocol has not been configured or the router has not learned to function (know the routes).
  5. 8. if the speed settings do not match and there is no communication or if the duplex setting are incorrect causing functionality but poor performance.
  6. 9. allows multiple network interfaces to be placed into a team for the purpose of bandwidth aggregation and/or traffic failover to prevent connectivity loss in the event of a network component failure.
  7. 10. when the ports by common services and applications are blocked on the firewall of a device it will be impossible to make use of the service or application
  8. 12. the bending of an RF signal as it passes through a medium with a different density, thus causing the direction of the wave to change.
  9. 13. when material absorbs a signal and reduces its strength.
  10. 15. the delay typically incurred in the processing of network data.
  11. 17. on a WAN connection communication routes may fail if an intermediate network segment has an MTU that is smaller than the maximum packet size of the communicating host.
  12. 18. a service that resolves IP address to MAC addresses.
  13. 20. if portions of a wave are reflected, new wave fronts will appear from the reflection points. If the multiple waves all reach the receiver, the multiple reflected signals cause an effect call multipath, which degrades the strength and quality of the received signal or even cause data corruption or cancelled signals.
  14. 21. used to automate the process of assigning IP configurations to hosts, reduce administrative overload, human error inherent in manual IP assignments, and enhances device mobility.
  15. 22. a small LED, amber in color LED usually found on both the Ethernet NICs and hubs. When lit it indicates that an Ethernet collision has occurred.
  16. 23. they can separate the network into multiple collisions domains, learn the MAC address of the devices attached to them, create a type of permanent virtual circuit between all network devices, and prevent collisions.
  17. 25. a wiring error where two connections that are supposed to be connected using the two wires of a twisted pair are instead connected using two wires form different pairs.
  18. 28. The hardware slots available to add new features which fits into a multilayer switch and/or routers slot.
  19. 29. the difference in decibels between the received signal and the background noise level (floor noise)
  20. 32. a specific type of crosstalk measurement that has to do with the EMI bled from a wire to adjoining wires where the current originates
  21. 33. is a router interface’s address that’s configured to forward traffic with a destination IP address that’s not in the same subnet as the device itself.
  22. 35. problem exist between the chair and the keyboard (EEOC) (PEBCAK) (ID10T)
  23. 37. when two devices try to communicate on the same physical segment at the same time.
  24. 38. When two different fiber transmitters at each end of the cable are using either a longer or a shorter wavelength. You have to make sure your transmitters match at both ends of the cable.
  25. 39. may occur if the routing loop hasn’t be configured properly, network changes didn’t get the attention they deserved or the administrative blew the static configuration and has created conflicting routes through the network.
Down
  1. 1. the largest size packet that is allowed across a segment.
  2. 3. network connection to switches with links to provide for fault tolerance and load balancing
  3. 7. when signals interfere with the normal operation of electronic circuits such as electro-magnetic interference (EMI) or radio frequency interference ( RFI).
  4. 11. too many devices connecting to an access point (AP) resulting in low available bandwidth.
  5. 14. when cable testing equipment tells you that the cable or wires connect into another cable and there is an impedance mismatch.
  6. 16. when you apply a top-down approach to troubleshooting a networking problem.
  7. 19. when the current flows through a different path within a circuit that it supposed to; in networks they are usually caused by some physical fault in the wire.
  8. 24. If STP fails between switches or is disabled by and administrator, it is possible that the traffic could continue to be flooded repeatedly throughout the switch topology.
  9. 26. when the Transmit wire is connected to Transmit and the Receive wire is connect to Receive. The wires should be Transmit to Receive.
  10. 27. a lack of any light what-so-ever
  11. 30. when there’s signal bleed between two adjacent wires that are carrying current.
  12. 31. a took which detects and responds to collisions.
  13. 34. a phenomenon which occurs as a signal moves through any medium, the medium itself degrades the signal.
  14. 36. recording certain actions to ensure network security; which may impact latency and performance.