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.)

Question:
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 source port field identifies the running application or service that will handle data returning to the PC.
• The TCP process running on the PC randomly selects the destination port when establishing a session with the server.
• UDP segments are encapsulated within IP packets for transport across the network.
• The UDP destination port number identifies the application or service on the server which will handle the data.
• TCP is the preferred protocol when a function requires lower network overhead.
• The TCP source port number identifies the sending host on the network.

Explanation: Layer 4 port numbers identify the application or service which will handle the data. The source port number is added by the sending device and will be the destination port number when the requested information is returned. Layer 4 segments are encapsulated within IP packets. UDP, not TCP, is used when low overhead is needed. A source IP address, not a TCP source port number, identifies the sending host on the network. Destination port numbers are specific ports that a server application or service monitors for requests.

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