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Cisco 4 test mecc
Chapter 4
20
Computer Networking
Undergraduate 1
09/19/2011

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Cards

Term
1 Refer to the exhibit. What two pieces of information can be determined from the output that is shown
Definition
* A termination request has been sent to 192.135.250.10.
Communication with 64.100.173.42 is using HTTP Secure.
* The local computer is accepting HTTP requests.
192.168.1.101:1042 is performing the three-way handshake with 128.107.229.50:80
Term
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?
Definition
80
Term
Which information is found in both the TCP and UDP header information?
Definition
source and destination
Term
Which is an important characteristic of UDP?
Definition
minimal delays in data delivery
Term
Refer to the exhibit. Host A is 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?
Definition
reach a timeout and resend the data that needs to be acknowledged
Term
Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?
Definition
session establishment
Term
Refer to the exhibit. The initial TCP exchange of data between two hosts is shown in the exhibit. Assuming an initial sequence number of 0, what sequence number will be included in Acknowledgment 2 if Segment 6 is lost?
Definition
1850
Term
Why is flow control used for TCP data transfer?
Definition
to prevent the receiver from being overwhelmed by incoming data
Term
During a TCP communication session, if the packets arrive to the destination out of order, what will happen to the original message?
Definition
The packets will be delivered and reassembled at the destination.
Term
With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?
Definition
0 to 1023
Term
Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?
Definition
UDP
Term
What are two features of the User Datagram Protocol (UDP)? (Choose two.)
Definition
* low overhead
* connectionless
Term
What mechanism is used by TCP to provide flow control as segments travel from source to destination?
Definition
window size
Term
What is dynamically selected by the source host when forwarding data?
Definition
Source Port
Term
Why are port numbers included in the TCP header of a segment?
Definition
to enable a receiving host to forward the data to the appropriate application
Term
Which two options represent Layer 4 addressing? (Choose two.)
Definition
* identifies the communicating applications
* identifies multiple conversations between the hosts
Term
Which three features allow TCP to reliably and accurately track the transmission of data from source to destination?
Definition
flow control
session establishment
Term
Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?
Definition
Tranport layer
Term
Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)
Definition
This contains a Telnet request
This is a TCP header.
Term
Which event occurs during the transport layer three-way handshake?
Definition
TCP initializes the sequence numbers for the sessions
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