chapter 7 CCNA routing and switching V5.0 / 2013-2014

chapter 7 routing & switching V5.0


What is the complete range of TCP and UDP well-known ports?

• 0 to 1023

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A host device sends a data packet to a web server via the HTTP protocol. What is used by the transport layer to pass the data stream to the proper application on the server?

• destination port number

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Fill in the blank using a number. A total of ____ messages are exchanged during the TCP session termination process between the client and the server.

• four

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Which scenario describes a function provided by the transport layer?
A student has two web browser windows open in order to access two web sites.

• The transport layer ensures the correct web page is delivered to the correct browser window

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Which factor determines TCP window size?

• the amount of data the destination can process at one time

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What happens if the first packet of a TFTP transfer is lost?

• The TFTP application will retry the request if a reply is not received.

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What is a beneficial feature of the UDP transport protocol?

• fewer delays in transmission

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Compared to UDP, what factor causes additional network overhead for TCP communication?

• network traffic that is caused by retransmissions

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What is a socket?

• the combination of a source IP address and port number or a destination IP address and port number

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Which two TCP header fields are used to confirm receipt of data?

• Sequence number
• Acknowledgement number

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During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?

• the next byte that the destination expects to receive

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During a TCP session, the ____ field is used by the client to request communication with the server

• SYN, SYN-ACK, and ACK
   

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A 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?

• multiplexing

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A 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?

• 10 segments

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A technician wishes to use TFTP to transfer a large file from a file server to a remote router. Which statement is correct about this scenario?

• The file is segmented and then reassembled in the correct order at the destination, if necessary, by the upper-layer protocol..

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What does a client do when it has UDP datagrams to send?

• It just sends the datagrams

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Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

• SYN
• ACK

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What does a client application select for a TCP or UDP source port number?

• a random value in the range of the registered ports

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Which transport layer feature is used to guarantee session establishment?

• TCP 3-way handshake

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Match the characteristic to the protocol category
TCP:

• window size
• 3-way handshake

UDP:

• best for VoIP
• connectionless

Both UPD and TCP:

• port number
• checksum

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Match each application to its connectionless or connection-oriented protocol

TCP:

• HTTP
• FTP
• Telnet

UDP:

• DHCP
• TFTP

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Refers to the exhibit. Consider a datagram that originates on the PC and that is destined for the webserver.
Source IP address

• 192.168.1.2

Destination IP address

• 192.168.2.2

Source port number

• 2578

Destination port number

• 80