ITA pt.2

38. When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check? CRC in the trailer source MAC address in the header destination MAC address in the header protocol type in the header

A

50. What OSI physical layer term describes the process by which one wave modifies another wave?

MODULATION

53. What OSI physical layer term describes the measure of the transfer of bits across a medium over a given period of time?

throughput

32. What are two examples of the cut-through switching method? (Choose two.) store-and-forward switching fast-forward switching CRC switching fragment-free switching QOS switching

B, D

42. What is the auto-MDIX feature? It enables a device to automatically configure an interface to use a straight-through or a crossover cable. It enables a device to automatically configure the duplex settings of a segment. It enables a device to automatically configure the speed of its interface. It enables a switch to dynamically select the forwarding method.

A

48. What does the term "attenuation" mean in data communication? loss of signal strength as distance increases time for a signal to reach its destination leakage of signals from one cable pair to another strengthening of a signal by a networking device

A

49. What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.) greater distances per cable run lower installation cost limited susceptibility to EMI/RFI durable connections greater bandwidth potential easily terminated

A, C, E

33. Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame? cut-through switching store-and-forward switching fragment-free switching fast-forward switching

B

37. Which advantage does the store-and-forward switching method have compared with the cut-through switching method? collision detecting frame error checking faster frame forwarding frame forwarding using IPv4 Layer 3 and 4 information

B

40. What are two actions performed by a Cisco switch? (Choose two.) building a routing table that is based on the first IP address in the frame header using the source MAC addresses of frames to build and maintain a MAC address table forwarding frames with unknown destination IP addresses to the default gateway utilizing the MAC address table to forward frames via the destination MAC address examining the destination MAC address to add new entries to the MAC address table

B, D

31. A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task? port-based buffering level 1 cache buffering shared memory buffering fixed configuration buffering

C

44. Which is a multicast MAC address? FF-FF-FF-FF-FF-FF 5C-26-0A-4B-19-3E 01-00-5E-00-00-03 00-26-0F-4B-00-3E

C

39. Which switching method uses the CRC value in a frame? cut-through fast-forward fragment-free store-and-forward

D

58. What OSI physical layer term describes the physical medium that uses the propagation of light?

fiber optic cable

56. What OSI physical layer term describes the measure of usable data transferred over a given period of time?

goodput

54. What OSI physical layer term describes the amount of time, including delays, for data to travel from one point to another?

latency

36. A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection? (Choose three.) The link between the switches will work at the fastest speed that is supported by both switches. The link between switches will work as full-duplex. If both switches support different speeds, they will each work at their own fastest speed. The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable. The connection will not be possible unless the administrator changes the cable to a crossover cable. The duplex capability has to be manually configured because it cannot be negotiated.

A, B, D

34. What is the purpose of the FCS field in a frame? to obtain the MAC address of the sending node to verify the logical address of the sending node to compute the CRC header for the data field to determine if errors occurred in the transmission and reception

D

35. Which switching method has the lowest level of latency? cut-through store-and-forward fragment-free fast-forward

D

41. Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.) Logical link control is implemented in software. Logical link control is specified in the IEEE 802.3 standard. The LLC sublayer adds a header and a trailer to the data. The data link layer uses LLC to communicate with the upper layers of the protocol suite. The LLC sublayer is responsible for the placement and retrieval of frames on and off the media.

A, D

43. What is one advantage of using the cut-through switching method instead of the store-and-forward switching method? has a positive impact on bandwidth by dropping most of the invalid frames makes a fast forwarding decision based on the source MAC address of the frame has a lower latency appropriate for high-performance computing applications​ provides the flexibility to support any mix of Ethernet speeds

C

59. What OSI physical layer term describes the physical medium for microwave transmissions?

air

51. What OSI physical layer term describes the capacity at which a medium can carry data?

bandwidth

57. What OSI physical layer term describes the physical medium which uses electrical pulses?

copper cable