Newly Released Cisco 400-007 Exam PDF

Cisco FabricPath is a Layer 2 multipath technology that blends traditional Layer 2 Ethernet with routing technologies to enable loop-free forwarding and scalability. Two critical mechanisms used to mitigate loops:

C. RPF (Reverse Path Forwarding) Check: FabricPath applies a reverse path forwarding check, similar to multicast, to verify the source of a frame and discard duplicates arriving on unexpected paths.

D. TTL Header: FabricPath adds a Time-To-Live (TTL) field to Layer 2 frames, which is not present in traditional Ethernet. This prevents indefinite circulation of frames by limiting their lifetime in the network—much like in IP.

These elements allow FabricPath to prevent broadcast storms and loops in multipath Layer 2 topologies, addressing legacy STP limitations with efficient loop-avoidance methods.

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B (IPFIX telemetry data):IPFIX provides detailed flow-level visibility, enabling identification of traffic patterns, data flows, and destinations. This data is critical for understanding current traffic behavior to identify governance gaps and improve policy compliance.

Other options explained:

A: Secure tunnels protect traffic but do not identify governance gaps.

C: Firewalls provide limited flow visibility compared to telemetry.

D: Workload policies enforce security but do not aid initial visibility analysis.

In Cisco Wireless Guest Anchor deployments, traffic between foreign and anchor controllers is typically tunneled using CAPWAP (Control and Provisioning of Wireless Access Points).

The CAPWAP tunnel operates over IP and can traverse MPLS VPN or VRF-Lite Layer 3 segmentation to maintain logical separation across different segments or geographic sites.

This allows end-to-end isolation of guest traffic from the enterprise network into the DMZ anchor location, as shown in the diagram.

Why other options are incorrect:

B: Unencapsulated traffic would expose guest traffic inside the enterprise network.

C: EoIP is not a standard Cisco wireless tunneling method.

D: IPinIP or IPsec tunnels are not typically used between WLCs for guest anchor tunneling.

B (Use only secure protocols): Management and administrative access to Internet edge routers must use secure protocols (SSH, SNMPv3, HTTPS) to prevent interception or unauthorized access.

E (Restrict administrative access): Limiting administrative access via interface ACLs and clear login banners ensures that only authorized personnel can access the system, satisfying compliance and security requirements.

Other options explained:

A: Filtering infrastructure IP space is good hygiene but not directly related to compliance.

C: Logging is valuable for operations and incident response but not a compliance control by itself.

D: EBGP advertisements relate to routing policy, not compliance regulation.