CCNA Introduction to Networks Chapter 7
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
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.
4
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.
What does a client do when it has UDP datagrams to send?
It just sends the datagrams.
Fill in the blank. During a TCP session, the _____ flag is used by the client to request communication with the server.
SYN
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
Which transport layer feature is used to guarantee session establishment?
TCP 3-way handshake
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.
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. UDP does not reorder the data. If necessary, UDP relies on the upper-layer protocols for reordering of the data. 7.2.3 UDP Communication
What does a client application select for a TCP or UDP source port number?
a random value in the range of the registered ports The client randomly selects an available source port in the range of the registered ports. 7.1.2 Introducing TCP and UDP
Which two TCP header fields are used to confirm receipt of data?
acknowledgment 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
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
What is a socket?
the combination of a source IP address and port number or a destination IP address and port number
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
