If you go to that link you'll see that non of the options are applicable to the data plane!
* A. routing protocol authentication (Control Plane)
* B. infrastructure ACLs (Management/Control Plane)
* C. redundant AAA servers (Management Plane)
* D. Control Plane Policing (Control Plane)
* E. warning banners (Management Plane)
* F. SNMPv3 (Management Plane)
* G. disable unused services (Management Plane)
B. Infrastructure ACLs: Infrastructure Access Control Lists (ACLs) are used to filter and control traffic at the network infrastructure level. By implementing ACLs, organizations can define and enforce granular access control policies for incoming and outgoing traffic, thereby protecting the data plane from unauthorized or malicious traffic.
G. Disable unused services: Disabling unused services helps reduce the attack surface of the network and minimizes potential vulnerabilities. By disabling unnecessary services, organizations can prevent unauthorized access and potential exploitation of unused or unnecessary functionalities.
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