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Cisco 200-301 Bundle

Exam Code: 200-301

Exam Name Cisco Certified Network Associate (CCNA)

Certification Provider: Cisco

Corresponding Certification: CCNA

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Cisco 200-301 Practice Test 56

Question 550

An operator wants network-wide topology and device health displayed in one place instead of collecting output from 250 separate CLI logins. Which controller characteristic is relevant?

  1. A new DNS A record for every switch, without collecting operational metrics.
  2. A manually maintained spreadsheet updated only once a year.
  3. Disabling LLDP and telemetry on all devices.
  4. Centralized inventory, telemetry and topology visibility across managed infrastructure.

Explanation

Correct Answer

D:

An enterprise network controller can aggregate device inventory and operational state to give consistent topology and health information. This helps identify faults and compare policy across sites. A controller still depends on appropriate collection permissions and device connectivity; it cannot infer arbitrary unknown devices without data.

Incorrect Answers

A:

Name records help locate devices but do not show interface status or network topology. A management platform must actually ingest state.

B:

A static inventory does not provide the requested current centralized operational view or automatically refreshed telemetry. It may be useful as a record but not as a live controller.

C:

Removing local discovery and measurement can reduce the data the controller needs. It undermines operational visibility.

Question 551

A controller centrally pushes consistent network policy, but user traffic between two local access switches must continue using their normal forwarding hardware. What distinction is accurate?

  1. Central management/control does not imply all user data packets traverse the controller.
  2. A VLAN trunk becomes a Layer 3 route because policy is centralized.
  3. Every controller deployment necessarily tunnels all Ethernet payloads to the management server.
  4. Switch forwarding stops whenever the controller UI is closed.

Explanation

Correct Answer

A:

Controller-based networking separates policy and device management from the data forwarding work performed by network infrastructure. Depending on platform and design, the controller may program device behavior while packet switching remains local. Confusing the control plane with every data packet path can lead to mistaken capacity and fault assumptions.

Incorrect Answers

B:

Controller management location does not change 802.1Q trunks into IP routes. Link-layer and routing semantics remain distinct.

C:

Centralized management can program distributed forwarding devices, so all user frames do not inherently hairpin through the controller. The data path depends on the specific technology.

D:

A management interface session is separate from established hardware forwarding state. Closing a browser does not normally disable every programmed switch dataplane.

Question 552

A network team runs an automation controller in a management zone. The controller can deploy changes, but production switches should not accept unauthorized requests from arbitrary clients. What safeguard is required?

  1. Expose all device Telnet ports publicly as a backup.
  2. Disable every controller login credential so scripts run faster.
  3. Replace all management ACLs with a wider VLAN to simplify reachability.
  4. Controller/device authentication, authorization and secured management API transport.

Explanation

Correct Answer

D:

A centralized controller is a powerful control-plane component and must use trusted identity, encrypted communication and least-privileged permissions when managing devices. Inventory scoping and change review reduce the effect of mistakes. Centralized automation does not exempt the deployment from normal security controls.

Incorrect Answers

A:

Telnet is unencrypted and broad Internet exposure increases attack surface. It is not a safe controller recovery strategy.

B:

Anonymous control-plane access would allow unauthorized policy changes across the network. The speed gain does not justify the security exposure.

C:

Broader Layer 2 access does not enforce identity or API authorization. The controller must be secured at the management boundary.

Question 553

A campus traditionally configures VLAN and policy changes through separate SSH sessions on every switch. The team now wants to express intent centrally and let a controller coordinate deployment. Which architecture change is being proposed?

  1. Eliminate every access switch and forward all Ethernet frames through the management laptop.
  2. Use an unrelated new VLAN number as proof of central management.
  3. A shift from individually managed devices to controller-based centralized network management.
  4. Make each access switch a standalone device with independent policy copies.

Explanation

Correct Answer

C:

A controller-based approach provides a centralized interface or API for expressing and deploying network policy across participating devices. It can reduce manual device-by-device configuration while the switches still perform local data forwarding. The controller must remain authorized and resilient; centralization does not eliminate the underlying network.

Incorrect Answers

A:

Controller-based management does not mean replacing physical forwarding hardware with a laptop. Devices still carry user traffic.

B:

A VLAN ID is a Layer 2 segment identifier and does not establish a controller architecture or policy orchestration service.

D:

That retains the traditional decentralized configuration pattern the team is replacing, not centralized intent.

Question 554

A router keeps forwarding already established traffic during a brief controller connectivity outage, though new policy changes are temporarily unavailable. Which design principle explains that?

  1. The router no longer needs a route table when a controller exists.
  2. The controller must be physically in each packet path for all traffic.
  3. NTP clock synchronization substitutes for the control connection.
  4. Forwarding-plane operation can continue on programmed devices independently of controller reachability.

Explanation

Correct Answer

D:

In many controller-based architectures, the hardware data plane uses installed forwarding entries while controller communication provides management and policy updates. A temporary controller outage may delay changes without instantly stopping every packet. The exact failure behavior depends on the implementation and must be tested for the chosen platform.

Incorrect Answers

A:

Local forwarding still uses programmed tables or equivalent hardware entries. Controller presence does not abolish route lookup.

B:

If that were mandatory, local hardware forwarding would not normally survive the controller outage. The observed behavior suggests distributed dataplane state.

C:

Time service supports logging and security but does not replace a controller’s policy/control messaging. Existing forwarding state explains the behavior.

Question 555

A network controller offers a northbound REST interface consumed by the enterprise IT service portal. A campus operator asks whether this means the controller is also the Internet gateway. Which response is correct?

  1. A controller always performs Ethernet STP root election for all unrelated networks.
  2. Northbound application management APIs are not the same as the network’s routed gateway function.
  3. Every northbound API endpoint must be assigned as the host default gateway.
  4. An API resource path is an 802.1Q native VLAN by definition.

Explanation

Correct Answer

B:

A controller may expose northbound APIs for inventory, intent and automation, while routers and switches still forward IP packets according to network topology. The API is a management integration point, not a default gateway address for every endpoint. Its authentication and data model must be governed separately from the forwarding plane.

Incorrect Answers

A:

STP operates within Layer 2 switch domains according to their configurations. A management API does not automatically replace that local protocol.

C:

An HTTP API endpoint is not automatically an IP next hop for user traffic. Clients use appropriate network gateways independent of management APIs.

D:

REST resource paths are application-layer identifiers, not VLAN tags. These fields belong to different protocol layers.

Question 556

Traditional device-by-device configuration produces inconsistent ACLs at branches. A network controller supports policy templates and intended-state reconciliation. What operational difference does it provide?

  1. Centralized policy intent with repeatable enforcement rather than separate manual CLI edits.
  2. A guarantee that an incorrect central ACL cannot cause outages.
  3. Only a different switch management hostname.
  4. Automatic removal of all IPv4 ACL syntax from hardware dataplanes.

Explanation

Correct Answer

A:

A controller can represent policy in a shared management model and push consistent derived configurations to eligible network devices. Reconciliation can reveal or repair drift from the desired state. It does not mean every device supports every feature; templates and device compatibility still need validation.

Incorrect Answers

B:

Centralized consistency can spread both good and bad policy. Reviews, testing and rollback remain essential.

C:

A hostname change does not provide central policy deployment or reduce configuration drift. It is a cosmetic device label.

D:

Controller intent must ultimately translate to supported forwarding/filtering behavior on devices. The hardware still enforces access policy.

Question 557

A provider presents multiple tenant logical networks with independent addressing over one shared routed data-center fabric. Which network layer describes these tenant virtual segments?

  1. Only the underlying physical routed IP links, without logical encapsulation.
  2. An overlay network implemented above the shared underlay transport.
  3. One common unsegmented VLAN assigned to every tenant.
  4. An NTP reference clock hierarchy.

Explanation

Correct Answer

B:

An overlay builds logical packet paths or segments over an existing transport network, often using encapsulation. This lets tenants maintain separation without requiring the physical fabric to contain a unique interface for every segment. The overlay still requires an operational underlay to carry its packets.

Incorrect Answers

A:

The physical underlay carries traffic but does not alone describe the independent tenant virtual segments requested. The added logical network is the overlay.

C:

A single shared VLAN would remove the independent logical network separation the provider requires.

D:

Time source hierarchy does not create tenant data-plane segmentation. It is a separate operational service.

Question 558

A network controller changes forwarding configuration on an access switch through its device-management channel. Which SDN interface direction is represented?

  1. A southbound interaction from the controller toward a managed network device.
  2. An Internet-bound default route from a laptop.
  3. Northbound, because the switch is physically above the controller in a rack.
  4. An SNMP trap from the switch to a collector as the only required path.

Explanation

Correct Answer

A:

Southbound interfaces connect the controller’s control/management functions to switches, routers or APs whose behavior is being configured. The controller translates higher-level policy into supported device operations. A northbound API instead faces applications or orchestration clients above the controller.

Incorrect Answers

B:

A default route carries data packets to a next hop; it does not describe a controller programming a device through an API.

C:

SDN northbound/southbound describes logical software architecture, not physical rack position. Controller-to-device control is southbound.

D:

Telemetry notifications may inform management, but the question describes configuration flowing from the controller to a device. That is southbound control.

Question 559

A network team models its campus as a fabric with policy groups and an underlay capable of transporting data. What does the term fabric imply in a controller-based design?

  1. One single Ethernet cable between every endpoint.
  2. A DNS zone that stores all switch MAC addresses.
  3. A requirement to turn off every router in favor of hubs.
  4. An integrated network transport/control structure supporting consistent connectivity and segmentation across devices.

Explanation

Correct Answer

D:

A network fabric brings multiple physical or virtual devices together to provide coordinated forwarding and policy across a topology. The fabric may use an underlay and overlays, with a controller offering automation and intent. Fabric is a network design concept rather than the name of one physical cable or management user.

Incorrect Answers

A:

A fabric can comprise many links and devices. It is not restricted to a literal point-to-point cable.

B:

DNS is a naming service and does not by itself coordinate the network dataplane or virtual transport.

C:

Fabric architectures can use routed physical underlays and modern switching. Removing routers would defeat the intended scalable connectivity.

Question 560

A controller fails but a switch continues forwarding packets using tables last programmed before the outage. Which separation is demonstrated?

  1. The switch data plane operates locally on installed forwarding state, while central control updates are unavailable.
  2. The switch no longer uses any forwarding state after controller loss.
  3. The controller remains physically in every data-packet path even while powered off.
  4. An NTP clock causes packets to route without device hardware.

Explanation

Correct Answer

A:

Forwarding hardware can continue matching packets against existing programmed tables even when management-plane connectivity is temporarily lost. New policy or topology changes may not be applied until the controller recovers, depending on the platform. This illustrates separation of control and data functions rather than a universal zero-impact failure claim.

Incorrect Answers

B:

The observed continued delivery implies the switch still has usable local forwarding entries. Removing all state would not explain this behavior.

C:

A powered-off controller cannot forward every user packet in this scenario. The distributed dataplane explains continuity.

D:

Time synchronization cannot replace switching ASICs or forwarding tables. Local dataplane state is responsible.