The correct option is UDP.

The IPv4 header contains a Protocol field that holds a numeric value to identify the next layer protocol. The value 17 is assigned to UDP by IANA and it corresponds to the User Datagram Protocol. UDP is a connectionless transport protocol that uses port numbers to deliver datagrams to applications.

TCP is incorrect because the protocol number for TCP is 6 and TCP is a connection oriented transport protocol, so it does not match 17.

IGMP is incorrect because the protocol number for IGMP is 2 and IGMP is used for multicast group management at the IP layer rather than as a transport protocol.

ICMP is incorrect because the protocol number for ICMP is 1 and ICMP is an Internet control and diagnostic protocol rather than a transport protocol for application data.

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