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20 Cards in this Set
- Front
- Back
What two pieces of information can be determined from the output that is shown (two answers) |
The local host is using three client sessions.
The local host is using web sessions to a remote server. |
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After a web browser makes a request to a web server that is listening to the standard port, what will be the source port number in the TCP header of the response from the server? |
Port 80 |
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Which information is found in both the TCP and UDP header information? |
Source
destination |
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Which is an important chateristic of UDP? |
minimal delays in data delivery. |
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"Host A" using FTP to download a large file from server 1. During the download process, Server 1 does not receive an acknowledgment from "Host A" for several bytes of transferred data. What action will Server 1 take as a result? |
Reach a timeout and resend the data that needs to be acknowledged. |
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In the line 7 Wireshark capture, what TCP operation is being performed? |
session establishment |
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The initial TCP exchange of a data between two hosts is shown in the exhibit. Assuming an initial sequence number of 0, what a sequence number will be included in Acknowledgment 2 if segment 6 is lost? |
3431 |
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Why is flow control used for TCP data transfer? |
To prevent the receiver from being overwhelmed by incoming data. |
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During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message? |
The packets will be delivered and reassembled at the destination. |
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With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications? |
0 to 1023 |
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What transport layer protocol provides low overhead and would be used for applications which do not rewire reliable data delivery? |
UDP |
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What are two features of the User Datagram Protocol (UDP)? (two answers) |
Low overhead
Connectionless
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What mechanism is used by TCO to provide flow control as segment travel from source to destination? |
Window Size |
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What is dynamically selected by the source host when forwarding data? |
source port |
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Why are port numbers included in the TCP header of a segment? |
To enable a receiving host to a forward the data to the appropriate application. |
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Which two options represent Layer 4 addressing? (two answers) |
identifies the communicating applications
identifies multiple conversation between the hosts. |
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Which three features allow TCP to reliably and accurately track the transmission of data from source to destination? (three answers) |
flow control
session establishment
numbering and sequencing |
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Based on the transport layer header shown in the diagram, which of the following statement describe the established session? (two answers) |
this contains a Telnet request.
This is a TCP header. |
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Which event occurs during the transport layer three-way handshake? |
TCP initializes the sequences numbers for the sessions. |
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Host is in the process of setting up a TCP session with Host 2. Host 1 has sent a SYN message to begin session establishment. What happens next? |
Host 2 sends a segment with the ACK flag = 1, Syn Flag = 1 to Host 1 |
