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The TCAP part in SS7 refers to ________ layer of OSI.

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The TCAP part in SS7 refers to ________ layer of OSI.

(a) Physical

(b) Network

(c) Data Link

(d) Application

The question was posed to me during a job interview.

This interesting question is from Signalling System No. 7 (SS7) topic in chapter Wireless Networking of Wireless/Mobile

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Right choice is (d) Application

The explanation: The transaction capabilities application part in SS7 refers to the application layer which invokes the services of the SCCP and the MTP in a hierarchical format. TCAP is concerned with remote operations.

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