Question: What is the significance of the first octet in the Ua security protocol identifier, which is a string of five octets, in the context of Generic Authentication Architecture (GAA)?
Option 1: It specifies the version of the Ua security protocol.
Option 2: It denotes the organization responsible for specifying the Ua security protocol.
Option 3: It identifies the type of cryptographic algorithm used.
Option 4: It indicates the protocol's compatibility with different network architectures.
Explanation: The first octet of the Ua security protocol identifier identifies the organization that has specified the particular Ua security protocol, crucial for interoperability and understanding the protocol's origin and governance.