Identify the protocol that operates at the transport layer from the options below.

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Stream Control Transmission ProtocolInternet Control Message ProtocolNeighbor Discovery ProtocolDynamic Host Configuration Protocol

Explanation

Option A, Stream Control Transmission Protocol (SCTP), functions at the transport layer. The other protocols serve different purposes: ICMP is used for network diagnostics, Neighbor Discovery Protocol assists in network address resolution, and DHCP manages IP address allocation.