Cisco CCNA 200 301 Dumps 2025

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Here are 10 multiple-choice review questions with explanations based on the Cisco CCNA 200 301 Dumps objectives:

1. Which protocol is used by IPv6 for neighbor discovery instead of ARP?

A) DHCPv6

B) ICMPv6

C) NDP (Neighbor Discovery Protocol)

D) OSPFv3✅ Correct Answer: C

Explanation: IPv6 uses NDP (Neighbor Discovery Protocol), which is part of ICMPv6, to replace ARP (used in IPv4). NDP handles address resolution, router discovery, and duplicate address detection.

2. What is the default administrative distance of OSPF?

A) 90

B) 100

C) 110

D) 120✅ Correct Answer: C

Explanation: OSPF has a default administrative distance of 110. Lower AD values are preferred (e.g., EIGRP internal routes have an AD of 90, while static routes have an AD of 1).

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3. Which command enables port security on a switch interface?

A) switchport port-security

B) port-security enable

C) switchport security enable

D) port-security mac-address sticky✅ Correct Answer: A

Explanation: The correct command to enable port security is switchport port-security. Additional sub-commands (e.g., mac-address sticky) configure specific behaviors.

4. What is the purpose of a VLAN trunk?

A) To assign an IP address to a switch

B) To carry traffic for multiple VLANs over a single link

C) To disable STP on a port

D) To connect a host directly to a router✅ Correct Answer: B

Explanation: A VLAN trunk (using 802.1Q tagging) allows multiple VLANs to traverse a single physical link between switches or between a switch and a router.

5. Which routing protocol uses the Dijkstra algorithm?

A) EIGRP

B) OSPF

C) RIP

D) BGP✅ Correct Answer: B

Explanation: OSPF uses the Dijkstra algorithm (Shortest Path First) to calculate the best routes. EIGRP uses DUAL, RIP uses hop count, and BGP uses path attributes.

6. What does DHCP snooping protect against?

A) ARP spoofing

B) Rogue DHCP servers

C) VLAN hopping

D) MAC flooding✅ Correct Answer: B

Explanation: DHCP snooping prevents rogue DHCP servers from distributing incorrect IP configurations by filtering untrusted DHCP messages.

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7. Which WAN technology uses virtual circuits identified by DLCIs?

A) MPLS

B) Frame Relay

C) Metro Ethernet

D) PPP✅ Correct Answer: B

Explanation: Frame Relay uses DLCIs (Data Link Connection Identifiers) to identify virtual circuits. MPLS uses labels, PPP is point-to-point, and Metro Ethernet is Ethernet-based.

8. What is the first step in the router boot process?

A) Load the IOS image

B) Perform POST

C) Load the startup-config

D) Locate the configuration register✅ Correct Answer: B

Explanation: The router first performs POST (Power-On Self-Test) to check hardware before loading the IOS or configuration.

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9. Which QoS mechanism drops packets when congestion occurs?

A) FIFO

B) WFQ

C) Tail Drop

D) Shaping✅ Correct Answer: C

Explanation: Tail drop discards packets when a queue is full. Shaping buffers excess traffic, while WFQ (Weighted Fair Queuing) prioritizes flows.

10. What is the subnet mask for a /27 network?

A) 255.255.255.0

B) 255.255.255.128

C) 255.255.255.192

D) 255.255.255.224✅ Correct Answer: D

Explanation: A /27 subnet mask is 255.255.255.224 (27 bits = 11111111.11111111.11111111.11100000 in binary).

Final Tips for Cisco CCNA 200 301 Dumps:

• Focus on subnetting, VLANs, OSPF/EIGRP, security (ACLs, port security), and automation (APIC-EM, REST APIs).
• Practice simulations (e.g., configuring OSPF, VLANs) in Packet Tracer or GNS3.
• Memorize key protocols (e.g., SSH for secure access, SNMP for monitoring).

Would you like more questions on a specific topic (e.g., IPv6, STP, wireless)?