Final answer:
The port range 49152-65535 is used for dynamic or private ports that third-party applications can use on demand without formal registration. Other port ranges serve different purposes, with 1-1024 being well-known ports and 1025-32767, 32768-49151 being other dynamic ranges.
Step-by-step explanation:
The port range that is dynamically associated with third-party applications or services and can be used on demand without formally registering the port for use is d. 49152-65535. These are known as the dynamic or private ports and they are not controlled by the Internet Assigned Numbers Authority (IANA). Instead, they can be used by third-party applications to establish temporary service connections.
Port ranges a. 32768-49151 and c. 1025-32767 are also dynamic ports but are typically reserved for private or customized services, while range b. 1-1024 is designated for well-known ports assigned to common protocols and services by the IANA.