CCNA1 V4.0 Exploration - Chapter 4

Chapter 4 - Exam Answers




Which two options represent Layer 4 addressing? (Choose two.)

--> identifies the communicating applications
--> identifies multiple conversations between the hosts


Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)

--> A termination request has been sent to 192.135.250.10.
--> Communication with 64.100.173.42 is using HTTP Secure.


Based on the transport layer header shown in the diagram, which of the following statements describe the established session? (Choose two.)

--> This contains a Telnet request.
--> This is a TCP header.


With TCP/IP data encapsulation, which range of port numbers identifies all well-known applications?

--> 0 to 1023


Why are port numbers included in the TCP header of a segment?

--> to enable a receiving host to forward the data to the appropriate application



Which OSI model layer is responsible for regulating the flow of information from source to destination, reliably and accurately?

--> transport


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?

--> reach a timeout and resend the data that needs to be acknowledged


Why is flow control used for TCP data transfer?

--> to prevent the receiver from being overwhelmed by incoming data



Which two options represent Layer 4 addressing? (Choose two.)

--> identifies the communicating applications
--> identifies multiple conversations between the hosts


Refer to the exhibit. In line 7 of this Wireshark capture, what TCP operation is being performed?

--> session establishment


What is dynamically selected by the source host when forwarding data?

--> source port


What are two features of the User Datagram Protocol (UDP)? (Choose two.)

--> low overhead
--> connectionless


What mechanism is used by TCP to provide flow control as segments travel from source to destination?

--> window size


Which transport layer protocol provides low overhead and would be used for applications which do not require reliable data delivery?

--> UDP


Which information is found in both the TCP and UDP header information?

--> source and destination


Which three features allow TCP to reliably and accurately track the transmission of data from source to destination?

--> flow control
--> session establishment
--> numbering and sequencing


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.


Which is an important characteristic of UDP?

--> minimal delays in data delivery


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?

--> 80


Which event occurs during the transport layer three-way handshake?

--> TCP initializes the sequence numbers for the sessions.

Assesment item Q:

Refer to the exhibit. What two pieces of information can be determined from the output that is shown? (Choose two.)

--> The local host is using three client sessions.

--> The local host is using web sessions to a remote server.

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