Last Updated on May 20, 2021 by Admin
ITN Chapter 9 Exam Online
ITN -- Chapter 9 Exam
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ITN — Chapter 9 Exam
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Question 1 of 23
1. Question
2 pointsWhich two characteristics are associated with UDP sessions? (Choose two.)Correct
Incorrect
TCP:
· Provides tracking of transmitted data segments
· Destination devices will acknowledge received data.
· Source devices will retransmit unacknowledged data.UDP
· Destination devices will not acknowledge received data
· Headers use very little overhead and cause minimal delay.Hint
TCP:
· Provides tracking of transmitted data segments
· Destination devices will acknowledge received data.
· Source devices will retransmit unacknowledged data.UDP
· Destination devices will not acknowledge received data
· Headers use very little overhead and cause minimal delay. -
Question 2 of 23
2. Question
1 pointsWhat happens if part of an FTP message is not delivered to the destination?Correct
Incorrect
Because FTP uses TCP as its transport layer protocol, sequence and acknowledgment numbers will identify the missing segments, which will be re-sent to complete the message.Hint
Because FTP uses TCP as its transport layer protocol, sequence and acknowledgment numbers will identify the missing segments, which will be re-sent to complete the message. -
Question 3 of 23
3. Question
1 pointsA host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth?Correct
Incorrect
Multiplexing is useful for interleaving multiple communication streams. Window size is used to slow down the rate of data communication. Port numbers are used to pass data streams to their proper applications. Acknowledgments are used to notify a sending device that a stream of data packets has or has not been received.Hint
Multiplexing is useful for interleaving multiple communication streams. Window size is used to slow down the rate of data communication. Port numbers are used to pass data streams to their proper applications. Acknowledgments are used to notify a sending device that a stream of data packets has or has not been received. -
Question 4 of 23
4. Question
1 pointsWhat kind of port must be requested from IANA in order to be used with a specific application?Correct
Incorrect
Registered ports (numbers 1024 to 49151) are assigned by IANA to a requesting entity to use with specific processes or applications. These processes are primarily individual applications that a user has chosen to install, rather than common applications that would receive a well-known port number. For example, Cisco has registered port 1985 for its Hot Standby Routing Protocol (HSRP) process.Hint
Registered ports (numbers 1024 to 49151) are assigned by IANA to a requesting entity to use with specific processes or applications. These processes are primarily individual applications that a user has chosen to install, rather than common applications that would receive a well-known port number. For example, Cisco has registered port 1985 for its Hot Standby Routing Protocol (HSRP) process. -
Question 5 of 23
5. Question
1 pointsWhat type of information is included in the transport header?Correct
Incorrect
In a segment, the transport layer header will include the source and destination process, or port numbers. Destination and source physical addressing is included in the frame header. Destination and source logical addressing is included in the network header. Application data is encoded in the upper layers of the protocol stack.Hint
In a segment, the transport layer header will include the source and destination process, or port numbers. Destination and source physical addressing is included in the frame header. Destination and source logical addressing is included in the network header. Application data is encoded in the upper layers of the protocol stack. -
Question 6 of 23
6. Question
1 pointsWhat is a socket?Correct
Incorrect
A socket is a combination of the source IP address and source port or the destination IP address and the destination port number.Hint
A socket is a combination of the source IP address and source port or the destination IP address and the destination port number. -
Question 7 of 23
7. Question
1 pointsWhat is the complete range of TCP and UDP well-known ports?Correct
Incorrect
There are three ranges of TCP and UDP ports. The well-know range of port numbers is from 0 – 1023.Hint
There are three ranges of TCP and UDP ports. The well-know range of port numbers is from 0 – 1023. -
Question 8 of 23
8. Question
1 pointsWhich flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?Correct
Incorrect
In a TCP session, when a device has no more data to send, it will send a segment with the FIN flag set. The connected device that receives the segment will respond with an ACK to acknowledge that segment. The device that sent the ACK will then send a FIN message to close the connection it has with the other device. The sending of the FIN should be followed with the receipt of an ACK from the other device.Hint
In a TCP session, when a device has no more data to send, it will send a segment with the FIN flag set. The connected device that receives the segment will respond with an ACK to acknowledge that segment. The device that sent the ACK will then send a FIN message to close the connection it has with the other device. The sending of the FIN should be followed with the receipt of an ACK from the other device. -
Question 9 of 23
9. Question
1 pointsWhat is a characteristic of a TCP server process?Correct
Incorrect
Each application process running on the server is configured to use a port number, either by default or manually, by a system administrator. An individual server cannot have two services assigned to the same port number within the same transport layer services. A host running a web server application and a file transfer application cannot have both configured to use the same server port. There can be many ports open simultaneously on a server, one for each active server application.Hint
Each application process running on the server is configured to use a port number, either by default or manually, by a system administrator. An individual server cannot have two services assigned to the same port number within the same transport layer services. A host running a web server application and a file transfer application cannot have both configured to use the same server port. There can be many ports open simultaneously on a server, one for each active server application. -
Question 10 of 23
10. Question
2 pointsWhich two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)Correct
Incorrect
TCP uses the SYN and ACK flags in order to establish connectivity between two network devices.Hint
TCP uses the SYN and ACK flags in order to establish connectivity between two network devices. -
Question 11 of 23
11. Question
1 pointsA PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?Correct
Incorrect
With a window of 1000 bytes, the destination host accepts segments until all 1000 bytes of data have been received. Then the destination host sends an acknowledgment.Hint
With a window of 1000 bytes, the destination host accepts segments until all 1000 bytes of data have been received. Then the destination host sends an acknowledgment. -
Question 12 of 23
12. Question
1 pointsWhich factor determines TCP window size?Correct
Incorrect
Window is the number of bytes that the sender will send prior to expecting an acknowledgement from the destination device. The initial window is agreed upon during the session startup via the three-way handshake between source and destination. It is determined by how much data the destination device of a TCP session is able to accept and process at one time.Hint
Window is the number of bytes that the sender will send prior to expecting an acknowledgement from the destination device. The initial window is agreed upon during the session startup via the three-way handshake between source and destination. It is determined by how much data the destination device of a TCP session is able to accept and process at one time. -
Question 13 of 23
13. Question
1 pointsDuring a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?Correct
Incorrect
-
Question 14 of 23
14. Question
1 pointsWhat information is used by TCP to reassemble and reorder received segments?Correct
Incorrect
At the transport layer, TCP uses the sequence numbers in the header of each TCP segment to reassemble the segments into the correct order.Hint
At the transport layer, TCP uses the sequence numbers in the header of each TCP segment to reassemble the segments into the correct order. -
Question 15 of 23
15. Question
1 pointsWhat does TCP do if the sending source detects network congestion on the path to the destination?Correct
Incorrect
If the source determines that TCP segments are either not being acknowledged or not acknowledged in a timely manner, then it can reduce the number of bytes it sends before receiving an acknowledgment. Notice that it is the source that is reducing the number of unacknowledged bytes it sends. This does not involve changing the window size in the segment header.Hint
If the source determines that TCP segments are either not being acknowledged or not acknowledged in a timely manner, then it can reduce the number of bytes it sends before receiving an acknowledgment. Notice that it is the source that is reducing the number of unacknowledged bytes it sends. This does not involve changing the window size in the segment header. -
Question 16 of 23
16. Question
1 pointsWhat is a characteristic of UDP?Correct
Incorrect
UDP has no way to reorder the datagrams into their transmission order, so UDP simply reassembles the data in the order it was received and forwards it to the application.Hint
UDP has no way to reorder the datagrams into their transmission order, so UDP simply reassembles the data in the order it was received and forwards it to the application. -
Question 17 of 23
17. Question
1 pointsWhat does a client do when it has UDP datagrams to send?
Correct
Incorrect
When a client has UDP datagrams to send, it just sends the datagrams.Hint
When a client has UDP datagrams to send, it just sends the datagrams. -
Question 18 of 23
18. Question
1 pointsWhat happens if the first packet of a TFTP transfer is lost?Correct
Incorrect
The TFTP protocol uses UDP for queries, so the TFTP application must implement the reliability, if needed.Hint
The TFTP protocol uses UDP for queries, so the TFTP application must implement the reliability, if needed. -
Question 19 of 23
19. Question
1 pointsA host device is receiving live streaming video. How does the device account for video data that is lost during transmission?Correct
Incorrect
When TCP is used as the transport protocol, data must be received in a specific sequence or all data must be fully received in order for it to be used. TCP will use sequence numbers, acknowledgments and retransmission to accomplish this. However, when UDP is used as the transport protocol, data that arrives out of order or with missing segments may cause a momentary disruption, but the destination device may still be able to use the data that it has received. This technology results in the least amount of network delay by providing minimal reliability. Since live streaming video applications use UDP as the transport protocol, the receiver will continue showing the video although there may be a slight delay or reduction in quality.Hint
When TCP is used as the transport protocol, data must be received in a specific sequence or all data must be fully received in order for it to be used. TCP will use sequence numbers, acknowledgments and retransmission to accomplish this. However, when UDP is used as the transport protocol, data that arrives out of order or with missing segments may cause a momentary disruption, but the destination device may still be able to use the data that it has received. This technology results in the least amount of network delay by providing minimal reliability. Since live streaming video applications use UDP as the transport protocol, the receiver will continue showing the video although there may be a slight delay or reduction in quality. -
Question 20 of 23
20. Question
1 pointsWhy does HTTP use TCP as the transport layer protocol?Correct
Incorrect
When a host requests a web page, transmission reliability and completeness must be guaranteed. Therefore, HTTP uses TCP as its transport layer protocol.Hint
When a host requests a web page, transmission reliability and completeness must be guaranteed. Therefore, HTTP uses TCP as its transport layer protocol. -
Question 21 of 23
21. Question
1 pointsWhen is UDP preferred to TCP?Correct
Incorrect
UDP can be used when an application can tolerate some data loss. UDP is the preferred protocol for applications that provide voice or video that cannot tolerate delay.
Hint
UDP can be used when an application can tolerate some data loss. UDP is the preferred protocol for applications that provide voice or video that cannot tolerate delay.
-
Question 22 of 23
22. Question
3 pointsWhich three application layer protocols use TCP? (Choose three.)Correct
Incorrect
Some protocols require the reliable data transport that is provided by TCP. In addition, these protocols do not have real time communication requirements and can tolerate some data loss while minimizing protocol overhead. Examples of these protocols are SMTP, FTP, and HTTP.Hint
Some protocols require the reliable data transport that is provided by TCP. In addition, these protocols do not have real time communication requirements and can tolerate some data loss while minimizing protocol overhead. Examples of these protocols are SMTP, FTP, and HTTP. -
Question 23 of 23
23. Question
4 pointsRefer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.)
ITN Chapter 9 Exam Answers 001 Sort elements
- 192.168.1.2
- 192.168.2.2
- 2578
- 80
- 192.168.1.1
- 25
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source IP address
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destination IP address
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source port number
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destination port number
Correct
Incorrect