Last Updated on November 29, 2018 by Admin
Introduction to Networks (version 6.00) – ITN Chapter 4 Exam Beta Online 2018 100%
ITN -- Chapter 4 Exam Beta
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ITN -- Chapter 4 Exam Beta
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Question 1 of 47
1. Question
1 pointsWhat is indicated by the term throughput?Correct
Incorrect
Throughput is the measure of the transfer of bits across the media over a given period of time. Throughput is affected by a number of factors such as, EMI and latency, so it rarely matches the specified bandwidth for a network medium. The throughput measurement includes user data bits and other data bits, such as overhead, acknowledging, and encapsulation. The measure of the usable data transferred across the media is called goodput.Hint
Throughput is the measure of the transfer of bits across the media over a given period of time. Throughput is affected by a number of factors such as, EMI and latency, so it rarely matches the specified bandwidth for a network medium. The throughput measurement includes user data bits and other data bits, such as overhead, acknowledging, and encapsulation. The measure of the usable data transferred across the media is called goodput. -
Question 2 of 47
2. Question
1 pointsWhich type of connector does a network interface card use?Correct
Incorrect
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Question 3 of 47
3. Question
1 pointsWhat technique is used with UTP cable to help protect against signal interference from crosstalk?Correct
Incorrect
To help prevent the effects of crosstalk, UTP cable wires are twisted together into pairs. Twisting the wires together causes the magnetic fields of each wire to cancel each other out.Hint
To help prevent the effects of crosstalk, UTP cable wires are twisted together into pairs. Twisting the wires together causes the magnetic fields of each wire to cancel each other out. -
Question 4 of 47
4. Question
1 pointsWhat is one advantage of using fiber optic cabling rather than copper cabling?Correct
Incorrect
Copper cabling is usually cheaper and easier to install than fiber optic cabling. However, fiber cables generally have a much greater signaling range than copper.Hint
Copper cabling is usually cheaper and easier to install than fiber optic cabling. However, fiber cables generally have a much greater signaling range than copper. -
Question 5 of 47
5. Question
1 pointsWhy are two strands of fiber used for a single fiber optic connection?Correct
Incorrect
Light can only travel in one direction down a single strand of fiber. In order to allow for full-duplex communication two strands of fiber must be connected between each device.Hint
Light can only travel in one direction down a single strand of fiber. In order to allow for full-duplex communication two strands of fiber must be connected between each device. -
Question 6 of 47
6. Question
2 pointsA network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)Correct
Incorrect
EMI and RFI signals can distort and corrupt data signals that are carried by copper media. These distortions usually come from radio waves and electromagnetic devices such as motors and florescent lights. Crosstalk is a disturbance that is caused by adjacent wires bundled too close together with the magnetic field of one wire affecting another. Signal attenuation is caused when an electrical signal begins to deteriorate over the length of a copper cable.Hint
EMI and RFI signals can distort and corrupt data signals that are carried by copper media. These distortions usually come from radio waves and electromagnetic devices such as motors and florescent lights. Crosstalk is a disturbance that is caused by adjacent wires bundled too close together with the magnetic field of one wire affecting another. Signal attenuation is caused when an electrical signal begins to deteriorate over the length of a copper cable. -
Question 7 of 47
7. Question
3 pointsA network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)Correct
Incorrect
The three areas of concern for wireless networks focus on the size of the coverage area, any nearby interference, and providing network security. Extensive cabling is not a concern for wireless networks, as a wireless network will require minimal cabling for providing wireless access to hosts. Mobility options are not a component of the areas of concern for wireless networks.Hint
The three areas of concern for wireless networks focus on the size of the coverage area, any nearby interference, and providing network security. Extensive cabling is not a concern for wireless networks, as a wireless network will require minimal cabling for providing wireless access to hosts. Mobility options are not a component of the areas of concern for wireless networks. -
Question 8 of 47
8. Question
1 pointsWhich characteristic describes crosstalk?Correct
Incorrect
EMI and RFI can distort network signals because of interference from fluorescent lights or electric motors. Attenuation results in deterioration of the network signal as it travels along copper cabling. Wireless devices can experience loss of signals because of excessive distances from a access point, but this is not crosstalk. Crosstalk is the disturbance caused by the electric or magnetic fields of the signal carried on an adjacent wire within the same cable.Hint
EMI and RFI can distort network signals because of interference from fluorescent lights or electric motors. Attenuation results in deterioration of the network signal as it travels along copper cabling. Wireless devices can experience loss of signals because of excessive distances from a access point, but this is not crosstalk. Crosstalk is the disturbance caused by the electric or magnetic fields of the signal carried on an adjacent wire within the same cable. -
Question 9 of 47
9. Question
1 pointsRefer to the exhibit. What is wrong with the displayed termination?Correct
Incorrect
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Question 10 of 47
10. Question
1 pointsRefer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices?Correct
Incorrect
A straight-through cable is commonly used to interconnect a host to a switch and a switch to a router. A crossover cable is used to interconnect similar devices together like switch to a switch, a host to a host, or a router to a router. If a switch has the MDIX capability, a crossover could be used to connect the switch to the router; however, that option is not available. A rollover cable is used to connect to a router or switch console port.Hint
A straight-through cable is commonly used to interconnect a host to a switch and a switch to a router. A crossover cable is used to interconnect similar devices together like switch to a switch, a host to a host, or a router to a router. If a switch has the MDIX capability, a crossover could be used to connect the switch to the router; however, that option is not available. A rollover cable is used to connect to a router or switch console port. -
Question 11 of 47
11. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 12 of 47
12. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 13 of 47
13. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
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Question 14 of 47
14. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
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Question 15 of 47
15. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 16 of 47
16. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 17 of 47
17. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 18 of 47
18. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 19 of 47
19. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 20 of 47
20. Question
1 pointsA fiber cable has been made. Which error could be identified during a test of that cable?Correct
Incorrect
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Question 21 of 47
21. Question
1 pointsWhich layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?Correct
Incorrect
Encapsulation is a function of the data link layer. Different media types require different data link layer encapsulation.Hint
Encapsulation is a function of the data link layer. Different media types require different data link layer encapsulation. -
Question 22 of 47
22. Question
1 pointsWhat is a function of the data link layer?Correct
Incorrect
The data link layer of the OSI model is responsible for the following:
- allows Layers 3 through 7 access to the network media
- takes Layer 3 packets and packages them into frames
- prepares the network data for the physical network
- controls how data is placed and received on the media
- facilitates frame exchange between nodes over a physical network media such as UTP, fiber-optic, or air (for wireless networks)
- receives and directs packets to a higher layer protocol
- performs error detection
Hint
The data link layer of the OSI model is responsible for the following:- allows Layers 3 through 7 access to the network media
- takes Layer 3 packets and packages them into frames
- prepares the network data for the physical network
- controls how data is placed and received on the media
- facilitates frame exchange between nodes over a physical network media such as UTP, fiber-optic, or air (for wireless networks)
- receives and directs packets to a higher layer protocol
- performs error detection
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Question 23 of 47
23. Question
2 pointsWhat are two services performed by the data link layer of the OSI model? (Choose two.)Correct
Incorrect
The data link layer is responsible for the exchange of frames between nodes over a physical network media. Specifically the data link layer performs two basic services:
- It accepts Layer 3 packets and encapsulates them into frames.
- It provides media access control and performs error detection.
Hint
The data link layer is responsible for the exchange of frames between nodes over a physical network media. Specifically the data link layer performs two basic services:- It accepts Layer 3 packets and encapsulates them into frames.
- It provides media access control and performs error detection.
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Question 24 of 47
24. Question
1 pointsWhat does a router do when it receives a Layer 2 frame over the network medium?Correct
Incorrect
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does the following:
- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
Hint
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does the following:- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
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Question 25 of 47
25. Question
1 pointsWhat does a router do after de-encapsulating a received frame?Correct
Incorrect
Routers are responsible for encapsulating a frame with a proper format for the physical network media the routers connect. At each hop along the path, a router does the following:
- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
Hint
Routers are responsible for encapsulating a frame with a proper format for the physical network media the routers connect. At each hop along the path, a router does the following:- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
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Question 26 of 47
26. Question
1 pointsAfter the best path to forward a packet to a destination network is determined, what does a router do next?Correct
Incorrect
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does as follows:
- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
Hint
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does as follows:- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
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Question 27 of 47
27. Question
1 pointsWhat will a router do after re-encapsulating the packet into a new frame?Correct
Incorrect
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does as follows:
- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
Hint
Routers are responsible for encapsulating a frame with the proper format for the physical network media they connect. At each hop along the path, a router does as follows:- Accepts a frame from a medium
- De-encapsulates the frame
- Determines the best path to forward the packet
- Re-encapsulates the packet into a new frame
- Forwards the new frame appropriate to the medium of that segment of the physical network
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Question 28 of 47
28. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
Incorrect
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Question 29 of 47
29. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 30 of 47
30. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 31 of 47
31. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 32 of 47
32. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 33 of 47
33. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 34 of 47
34. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 35 of 47
35. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 36 of 47
36. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
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Question 37 of 47
37. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
Incorrect
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Question 38 of 47
38. Question
1 pointsWhat is a function provided by the data link layer of the OSI model?Correct
Incorrect
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Question 39 of 47
39. Question
2 pointsWhat are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)Correct
Incorrect
An encoding technique converts a stream of data bits in a predefined code that can be recognized by both the transmitter and the receiver. Using predefined patterns helps to differentiate data bits from control bits and provide better media error detection.Hint
An encoding technique converts a stream of data bits in a predefined code that can be recognized by both the transmitter and the receiver. Using predefined patterns helps to differentiate data bits from control bits and provide better media error detection. -
Question 40 of 47
40. Question
1 pointsWhat is the function of the CRC value that is found in the FCS field of a frame?Correct
Incorrect
The CRC value in the FCS field of the received frame is compared to the computed CRC value of that frame, in order to verify the integrity of the frame. If the two values do not match, then the frame is discarded.Hint
The CRC value in the FCS field of the received frame is compared to the computed CRC value of that frame, in order to verify the integrity of the frame. If the two values do not match, then the frame is discarded. -
Question 41 of 47
41. Question
1 pointsAs data travels on the media in a stream of 1s and 0s how does a receiving node identify the beginning and end of a frame?Correct
Incorrect
When data travels on the media, it is converted into a stream of 1s and 0s. The framing process inserts into the frame start and stop indicator flags so that the destination can detect the beginning and end of the frame.Hint
When data travels on the media, it is converted into a stream of 1s and 0s. The framing process inserts into the frame start and stop indicator flags so that the destination can detect the beginning and end of the frame. -
Question 42 of 47
42. Question
1 pointsWhich statement describes an extended star topology?Correct
Incorrect
In an extended star topology, central intermediate devices interconnect other star topologies.Hint
In an extended star topology, central intermediate devices interconnect other star topologies. -
Question 43 of 47
43. Question
1 pointsWhat is true concerning physical and logical topologies?Correct
Incorrect
Physical topologies show the physical interconnection of devices. Logical topologies show the way the network will transfer data between connected nodes.Hint
Physical topologies show the physical interconnection of devices. Logical topologies show the way the network will transfer data between connected nodes. -
Question 44 of 47
44. Question
1 pointsWhich data link layer media access control method does Ethernet use?Correct
Incorrect
CSMA/CD is used by Ethernet networks. CSMA/CA is used by 802.11-based wireless networks.Hint
CSMA/CD is used by Ethernet networks. CSMA/CA is used by 802.11-based wireless networks. -
Question 45 of 47
45. Question
1 pointsWhat type of physical topology can be created by connecting all Ethernet cables to a central device?Correct
Incorrect
Devices connected to the Ethernet star topology connect to either a hub or a switch.Hint
Devices connected to the Ethernet star topology connect to either a hub or a switch. -
Question 46 of 47
46. Question
3 pointsWhat three items are contained in an Ethernet header and trailer? (Choose three.)Correct
Incorrect
Layer 2 headers contain the following:
- Frame start and stop indicator flags at the beginning and end of a frame
- Addressing - for Ethernet networks this part of the header contains source and destination MAC addresses
- Type field to indicate what Layer 3 protocol is being used
- Error detection to determine if the frame arrived without error
Hint
Layer 2 headers contain the following:- Frame start and stop indicator flags at the beginning and end of a frame
- Addressing - for Ethernet networks this part of the header contains source and destination MAC addresses
- Type field to indicate what Layer 3 protocol is being used
- Error detection to determine if the frame arrived without error
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Question 47 of 47
47. Question
1 pointsA network team is comparing topologies for connecting on a shared media. Which physical topology is an example of a hybrid topology for a LAN?Correct
Incorrect
An extended star topology is an example of a hybrid topology as additional switches are interconnected with other star topologies. A partial mesh topology is a common hybrid WAN topology. The bus and ring are not hybrid topology types.Hint
An extended star topology is an example of a hybrid topology as additional switches are interconnected with other star topologies. A partial mesh topology is a common hybrid WAN topology. The bus and ring are not hybrid topology types.