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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 46

Question 450

A Cisco IOS router serves DHCP for 10.89.0.0/24. Clients obtain leases, but the server sometimes assigns 10.89.0.1, which is the statically configured default-gateway SVI address. Which change prevents this collision?

  1. Add `ip helper-address 10.89.0.1` to the same client SVI.
  2. Change the pool’s `default-router` setting to 10.89.0.2 without changing the gateway.
  3. Configure `ip dhcp excluded-address 10.89.0.1` (and other reserved infrastructure addresses as required).
  4. Increase the lease duration so the duplicated assignment lasts longer.

Explanation

Correct Answer

C:

An excluded-address range prevents the IOS DHCP service from leasing infrastructure IPs while retaining the pool for clients.

Incorrect Answers

A:

Relay is unnecessary for the local DHCP server and does not exclude a reserved address.

B:

An incorrect gateway option would break clients and still fail to reserve the actual address.

D:

Lease duration cannot prevent DHCP from selecting an infrastructure IP that remains in its allocatable set.

Question 451

A new branch LAN needs at least 55 usable IPv4 host addresses. Which CIDR prefix meets the requirement while reserving the SMALLEST conventional subnet?

  1. /27 (30 usable host IPs)
  2. /26 (62 usable host IPs)
  3. /28 (14 usable host IPs)
  4. /25 (126 usable host IPs)

Explanation

Correct Answer

B:

A /26 supplies 62 usable addresses; /27 is too small, while /25 wastes more addresses.

Incorrect Answers

A:

This prefix either cannot hold 55 usable hosts or allocates more addresses than the smallest valid subnet.

C:

That explanation does not distinguish this option. “/28 (14 usable host IPs)” is an alternative action, but it does not by itself establish the outcome required in this case.

D:

That explanation does not distinguish this option. “/25 (126 usable host IPs)” is an alternative action, but it does not by itself establish the outcome required in this case.

Question 452

An operations ticket for Lighthouse Medical has two requirements: (1) represent an ordered collection of network interfaces in JSON, and (2) represent the true/false state of an API interface property. Which plan correctly handles both requirements?

  1. First, send an authenticated HTTP GET to the resource URI; then recognize the software-defined network fabric architecture.
  2. First, use a JSON array enclosed in square brackets; then use JSON boolean true or false without quotation marks.
  3. First, use a JSON array enclosed in square brackets; then use Ansible playbooks and modules with device groups.
  4. First, run terraform plan and review its proposed actions; then use JSON boolean true or false without quotation marks.

Explanation

Correct Answer

B:

Both outcomes are covered: (1) JSON arrays contain ordered elements which can be objects, scalars or other arrays. (2) JSON has native boolean literals distinct from string values. Neither action is a substitute for the other.

Incorrect Answers

A:

Neither step is the requested pair: Send an authenticated HTTP GET to the resource URI is for retrieve a network device's configuration using a REST endpoint, and Recognize the software-defined network fabric architecture is for name the combination of underlay, overlay, and policy/control services. GET retrieves the representation of a resource without intending to create it. The proposed plan misses the two stated outcomes.

C:

The first step covers (1), but the second addresses apply the same network configuration task across devices from an inventory file. Ansible inventories and playbooks run repeatable tasks across selected managed devices. It leaves outcome (2) unfulfilled.

D:

The second step covers (2), but the first addresses check what Terraform intends to change before deploying. The plan reports resource changes without applying them to production. It leaves outcome (1) unfulfilled.

Question 453

An acceptance check at Cascade Health has two requirements: (1) avoid allowing untrusted access ports to forward forged DHCP server responses, and (2) troubleshoot DAI dropping valid static-IP devices that lack DHCP bindings. Select TWO actions that together satisfy both outcomes.

  1. Enable DHCP snooping globally and for the client VLAN, and trust only the legitimate DHCP server or relay uplink while keeping user ports untrusted
  2. Match the PSK configured on the WLAN and clients
  3. Add approved static ARP ACL validation entries or equivalent supported bindings
  4. Use a standard ACL deny for that source IP followed by required permits
  5. Enable dynamic ARP inspection with valid bindings and trusted infrastructure links

Explanation

Correct Answers

A:

Correct for outcome (1): Enable DHCP snooping globally and on the protected VLAN; trust only approved server/relay uplinks while leaving user-facing ports untrusted. On supported Cisco switches, trusted interfaces alone do not activate snooping, and a rogue server response on an untrusted access port must be dropped. The other outcome needs its separate action.

C:

Correct for outcome (2): DAI needs a trusted IP/MAC association for hosts without DHCP-snooping entries. It complements the first required control.

Incorrect Answers

B:

Not selected: Match the PSK configured on the WLAN and clients is for troubleshoot client association failure when the WLC has an incorrect pre-shared key. WPA2-Personal handshake succeeds only when both sides derive the same key material. This is not one of the two required changes.

D:

Not selected: Use a standard ACL deny for that source IP followed by required permits is for deny one known infected source IP regardless of destination using a simple filter. Standard ACLs match IPv4 source addresses rather than destination ports. This is outside the two requested outcomes.

E:

Not selected: Enable dynamic ARP inspection with valid bindings and trusted infrastructure links is for stop forged ARP replies claiming the default gateway IP on user access ports. DAI validates ARP address mappings against bindings or approved ARP ACLs. This does not provide either of the two specified controls.

Question 454

A branch design for Orion Shipping has two requirements: (1) translate one inside server IP to a fixed public IPv4 address, and (2) let several internal addresses consume a shared pool of public IPv4 addresses. Which proposed plan satisfies both outcomes?

  1. First, use DNS A record lookup; then configure dynamic inside source NAT using the permitted ACL and address pool.
  2. First, configure a static inside source NAT mapping; then configure dynamic inside source NAT using the permitted ACL and address pool.
  3. First, configure a static inside source NAT mapping; then apply traffic policing to the selected class.
  4. First, set an appropriate DSCP marking at a trusted policy boundary; then apply traffic shaping to buffer and pace excess packets.

Explanation

Correct Answer

B:

Both outcomes are covered: (1) Static NAT creates a persistent one-to-one inside-local to inside-global translation. (2) Dynamic NAT allocates eligible public addresses from a configured pool to matching inside hosts. Neither action is a substitute for the other.

Incorrect Answers

A:

The second step covers (2), but the first addresses identify the protocol that maps a host name to an IPv4 address. DNS maps names to addresses, while DHCP leases IP settings and does not replace DNS. It leaves outcome (1) unfulfilled.

C:

The first step covers (1), but the second addresses enforce an ingress traffic rate by dropping or remarking excess packets. Policing measures a rate and takes an immediate conform/exceed action without ordinary shaping buffers. It leaves outcome (2) unfulfilled.

D:

Neither step is the requested pair: Set an appropriate DSCP marking at a trusted policy boundary is for mark traffic for downstream QoS treatment without changing application payload, and Apply traffic shaping to buffer and pace excess packets is for smooth a bursty outbound application below a contracted rate. DSCP bits in the IP header signal intended per-hop forwarding treatment. The proposed plan misses the two stated outcomes.

Question 455

A point-to-point Serial0/0/0 link has one peer router and no other stations on that medium. Which distinction makes an exit-interface-only static route more straightforward here than on a shared Ethernet LAN?

  1. Point-to-point serial links automatically make every destination network connected
  2. A point-to-point interface identifies the only adjacent path; Ethernet interface-only routing may need per-destination next-hop resolution.
  3. Ethernet never supports static routes to a next-hop IP
  4. Point-to-point links convert static entries into learned OSPF routes

Explanation

Correct Answer

B:

On a serial point-to-point path the outgoing interface unambiguously identifies the peer. A multiaccess Ethernet interface alone does not identify one next-hop router.

Incorrect Answers

A:

A static route still describes a remote prefix; the link does not make all Internet hosts local.

C:

Ethernet supports normal next-hop static routes when the next hop is resolvable.

D:

A static interface route remains configured rather than being generated by OSPF.

Question 456

Harborview Logistics needs to power a ceiling AP through its Ethernet cable. Which implementation directly addresses that objective without replacing it with a different network control?

  1. Use an appropriate PoE-capable switchport and compatible power budget
  2. Make both link ends negotiate or explicitly agree on matching duplex
  3. Use a collapsed-core two-tier campus design
  4. Use compatible multimode fiber for the specified reach

Explanation

Correct Answer

A:

PoE delivers specified electrical power over Ethernet pairs while carrying network traffic. This is the control that implements the specified requirement.

Incorrect Answers

B:

A full/half duplex mismatch creates errors and poor performance even if the link stays up. That is not sufficient here: PoE delivers specified electrical power over Ethernet pairs while carrying network traffic.

C:

The access layer connects endpoints while the collapsed core aggregates access and provides routing. That is not sufficient here: PoE delivers specified electrical power over Ethernet pairs while carrying network traffic.

D:

Multimode fiber and matching optics suit many short data-center or campus uplinks. That is not sufficient here: PoE delivers specified electrical power over Ethernet pairs while carrying network traffic.

Question 457

An acceptance check at Sable Ridge Manufacturing has two requirements: (1) interconnect two Ethernet switch uplink ports with dedicated links, and (2) host a central application consumed by employee laptops. Which option addresses both requirements?

  1. First, classify 172.16.0.0 through 172.31.255.255 as private; then deploy an application server on a reachable network.
  2. First, run ip address show on Linux; then use a three-tier access/distribution/core architecture.
  3. First, use point-to-point Ethernet interfaces with matching capabilities; then deploy an application server on a reachable network.
  4. First, use point-to-point Ethernet interfaces with matching capabilities; then deploy an access point connected to an appropriate switchport.

Explanation

Correct Answer

C:

Both outcomes are covered: (1) Each switched uplink can operate as a dedicated full-duplex link rather than a shared collision segment. (2) A server offers shared application services while endpoint hosts initiate requests. Neither action is a substitute for the other.

Incorrect Answers

A:

The second step covers (2), but the first addresses recognize an RFC1918 address in 172.16.0.0/12. Only 172.16/12 is private, not all addresses beginning 172. It leaves outcome (1) unfulfilled.

B:

Neither step is the requested pair: Run ip address show on Linux is for show the assigned IPv4 and IPv6 addresses on a Linux interface, and Use a three-tier access/distribution/core architecture is for separate access, aggregation, and backbone roles in a large campus. The ip command displays local interface addresses without assuming legacy ifconfig is installed. The proposed plan misses the two stated outcomes.

D:

The first step covers (1), but the second addresses provide wireless client association to a wired enterprise LAN. The AP bridges 802.11 client frames to the wired distribution system. It leaves outcome (2) unfulfilled.

Question 458

An acceptance check at Willowbrook Transit has two requirements: (1) identify the route of last resort in an IPv4 routing table, and (2) interpret the administrative distance and metric displayed in brackets. Which proposed plan satisfies both outcomes?

  1. First, recognize a locally originated /32 host route; then compare administrative distances of static 1 and OSPF 110.
  2. First, find the default 0.0.0.0/0 route and gateway of last resort; then expect an FHRP backup peer to assume the virtual gateway role.
  3. First, find the default 0.0.0.0/0 route and gateway of last resort; then read the first bracketed value as administrative distance and the second as metric.
  4. First, use a higher floating static AD and maintain healthy connected interface; then read the first bracketed value as administrative distance and the second as metric.

Explanation

Correct Answer

C:

Both outcomes are covered: (1) A default route handles destinations not covered by a more-specific installed route. (2) IOS route display commonly uses [administrative distance/metric] following the route code. Neither action is a substitute for the other.

Incorrect Answers

A:

Neither step is the requested pair: Recognize a locally originated /32 host route is for interpret an L entry for a router's own IPv4 interface address, and Compare administrative distances of static 1 and OSPF 110 is for choose a static route over an OSPF route to the exact same prefix when both are valid. Local routes identify IP addresses assigned to the router itself. The proposed plan misses the two stated outcomes.

B:

The first step covers (1), but the second addresses recognize a standby gateway takeover after the active router fails. First-hop redundancy coordinates gateway ownership and failover for attached hosts. It leaves outcome (2) unfulfilled.

D:

The second step covers (2), but the first addresses ensure a backup static route does not override a directly connected route to the same prefix. Connected routes have distance 0 and normally beat ordinary or floating static alternatives. It leaves outcome (1) unfulfilled.

Question 459

A change advisory for Riverside Data has two requirements: (1) recognize an RFC1918 address in 172.16.0.0/12, and (2) recognize an RFC1918 address in 192.168.0.0/16. Which option meets both stated needs?

  1. First, classify 172.16.0.0 through 172.31.255.255 as private; then forward only through the learned destination port unless it is the ingress port.
  2. First, make both link ends negotiate or explicitly agree on matching duplex; then configure an IPv6 address and 64-bit prefix with IPv6 routing enabled where required.
  3. First, recognize globally routable 2000::/3 unicast addresses; then classify 192.168/16 as private IPv4 space.
  4. First, classify 172.16.0.0 through 172.31.255.255 as private; then classify 192.168/16 as private IPv4 space.

Explanation

Correct Answer

D:

Both outcomes are covered: (1) Only 172.16/12 is private, not all addresses beginning 172. (2) 192.168.0.0–192.168.255.255 is reserved for private addressing. Neither action is a substitute for the other.

Incorrect Answers

A:

The first step covers (1), but the second addresses deliver a frame with a known unicast destination in the same VLAN. Known unicast switching uses the CAM destination lookup to avoid unnecessary flooding. It leaves outcome (2) unfulfilled.

B:

Neither step is the requested pair: Make both link ends negotiate or explicitly agree on matching duplex is for resolve an Ethernet link showing late collisions and duplex inconsistency, and Configure an IPv6 address and 64-bit prefix with IPv6 routing enabled where required is for put an IPv6 /64 unicast prefix on a router interface. A full/half duplex mismatch creates errors and poor performance even if the link stays up. The proposed plan misses the two stated outcomes.

C:

The second step covers (2), but the first addresses distinguish a public-scope IPv6 unicast destination. IPv6 global unicast ranges provide global routing scope subject to assigned prefixes and filters. It leaves outcome (1) unfulfilled.

Question 460

An operations ticket for Greenfield Services has two requirements: (1) let a router obtain its WAN IPv4 address from a provider DHCP server, and (2) relay DHCP client broadcasts from a VLAN to a server in another subnet. Which plan correctly handles both requirements?

  1. First, generate appropriate RSA or supported SSH host keys; then use SNMP polling with permitted MIB object identifiers.
  2. First, configure ip address dhcp on the WAN interface; then configure remote syslog logging host and appropriate transport settings.
  3. First, configure ip address dhcp on the WAN interface; then configure ip helper-address on the client VLAN interface.
  4. First, recognize TFTP lacks encryption and authentication; then configure ip helper-address on the client VLAN interface.

Explanation

Correct Answer

C:

Both outcomes are covered: (1) A DHCP client interface requests leased IP parameters instead of using a fixed static address. (2) DHCP relay forwards qualifying broadcast requests as unicast toward the configured server. Neither action is a substitute for the other.

Incorrect Answers

A:

Neither step is the requested pair: Generate appropriate RSA or supported SSH host keys is for generate credentials used by an IOS SSH server, and Use SNMP polling with permitted MIB object identifiers is for collect network interface counters from switches for operational monitoring. SSH server authentication depends on a usable host key rather than only configuring a VTY password. The proposed plan misses the two stated outcomes.

B:

The first step covers (1), but the second addresses send router logs to a centralized log server. A syslog collector aggregates event messages across devices for correlation and retention. It leaves outcome (2) unfulfilled.

D:

The second step covers (2), but the first addresses explain why ordinary TFTP should not traverse an untrusted network. TFTP's simplicity leaves transfers exposed without a separate secure transport boundary. It leaves outcome (1) unfulfilled.