Which two security features are available when implementing NTP? (Choose two )

While NTP uses symmetric keys for authentication, 'symmetric server passwords' is not a standard or accurate term for the security feature; the core feature is encrypted authentication using shared symmetric keys.

'Dock offset authentication' is not a recognized NTP security feature or term; NTP focuses on authenticating the source and integrity of time messages, not a concept like 'dock offset'.

Broadcast association mode is an operational mode for NTP, not a security feature; it allows clients to discover NTP servers but inherently provides less security than unicast or authenticated modes due to its broadcast nature.

NTP uses cryptographic authentication, such as MD5 or SHA, to verify the authenticity of NTP messages and prevent unauthorized time modifications by ensuring that messages originate from trusted sources.

NTP supports access lists (ACLs) to restrict access to the NTP server, allowing administrators to define which hosts or networks are permitted to synchronize time or query the server, thus controlling who can interact with the NTP service.