Module 9: The Transport Layer Quiz

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

-ACK -SYN

Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)

-DNS -VoIP

Data is being sent from a source PC to a destination server. Which three statements correctly describe the function of TCP or UDP in this situation? (Choose three.)

-The UDP destination port number identifies the application or service on the server which will handle the data. -The source port field identifies the running application or service that will handle data returning to the PC. -UDP segments are encapsulated within IP packets for transport across the network.

What are two roles of the transport layer in data communication on a network? (Choose two.)

-tracking the individual communication between applications on the source and destination hosts -identifying the proper application for each communication stream

Which two fields are included in the TCP header but not in the UDP header? (Choose two.)

-window -sequence number

Which tool is used to provide a list of open ports on network devices?

Nmap

Which transport layer feature is used to guarantee session establishment?

TCP 3-way handshake

What happens if part of an FTP message is not delivered to the destination?

The part of the FTP message that was lost is re-sent.

What is a characteristic of a TCP server process?

There can be many ports open simultaneously on a server, one for each active server application.

Refer to the exhibit. Which three lines represent the TCP three-way handshake?

lines 2, 3, and 4

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

What is the purpose of the TCP sliding window?

to request that a source decrease the rate at which it transmits data