Which of the following protocols is used in large networks working as service providers?

A.
Intermediate System-to-Intermediate System protocol (IS-IS)
B.
Enhanced Interior Gateway Routing protocol (EIGRP)
C.
External Border Gateway protocol (eBGP)
D.
Open Shortest Path First protocol (OSPF)
Explanation:
Shouldn’t C be the answer?
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Must be BGP!
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