350-601 Exam Dumps - Implementing Cisco Data Center Core Technologies v1.1 (350-601 DCCOR)

Option B is correct because on Cisco Nexus NX-OS, the command aaa authentication login default group < server-group > local creates the default login authentication method list and tells the switch to try the named AAA server group first, then fall back to the local user database if the AAA servers are unreachable or do not respond. Cisco’s NX-OS AAA documentation states that the default login method list is used for user logins, and that the group keyword points authentication to a configured TACACS+ or RADIUS server group. It also notes that local authentication is the fallback method unless that behavior is explicitly disabled. (Cisco)

The key reason the answer is B is the syntax: group ISE local means “authenticate with the TACACS+ server group named ISE first, then use local if the server is unavailable.” Option C uses only local authentication, so it does not use TACACS+ at all. Option D applies to console login configuration and is not the correct default user-login command. Option A is incorrect syntax for enabling this behavior; Cisco documents fallback error local as a behavior that is already present by default and can be disabled with the no form. (Cisco)

The correct answer is D. through dual fabric interconnects.

Cisco UCS X-Series achieves management high availability by using a pair of Fabric Interconnects (FIs), which provide redundant connectivity and management-plane resiliency for the chassis and its components. In UCS architecture, the fabric interconnects are the central control and management point for the compute domain, so deploying them as a redundant pair ensures that management access and infrastructure communication continue if one FI fails.

Option A is incorrect because UCS Director is an orchestration platform, not the native HA mechanism for UCS-X management components. Option B is incorrect because UCS Manager is associated with classic UCS domains and is not described as separate redundant manager instances in this context. Option C is also incorrect because Cisco Intersight is a SaaS or appliance-based management platform, but UCS-X high availability at the domain level is not achieved by running multiple Intersight instances.

The actual device-level resiliency for management in UCS-X comes from the redundant fabric interconnect design, which protects management and connectivity paths for the chassis, I/O, and compute resources. Therefore, dual fabric interconnects are the correct answer.