Chapter 7: Transport Layer
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.*
What is a socket?
the combination of a source IP address and port number or a destination IP address and port number*
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*
What is the complete range of TCP and UDP well-known ports?
0 to 1023*
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
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.*
A total of "4" messages are exchanged during the TCP session termination process between the client and the server.
A total of "4" messages are exchanged during the TCP session termination process between the client and the server.
During a TCP session, the "SYN" field is used by the client to request communication with the server.
During a TCP session, the "SYN" field is used by the client to request communication with the server.
Which transport layer feature is used to guarantee session establishment?
TCP 3-way handshake
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
What does a client application select for a TCP or UDP source port number?
a random value in the range of the registered ports*
Which two TCP header fields are used to confirm receipt of data?
acknowledgement number sequence number
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
What is a beneficial feature of the UDP transport protocol?
fewer delays in transmission*
What does a client do when it has UDP datagrams to send?
just sends datagrams
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
Compared to UDP, what factor causes additional network overhead for TCP communication?
network traffic that is caused by retransmissions*
Which factor determines TCP window size?
the amount of data the destination can process at one time*
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*
