CCNA 200-125 Real Exam Questions That Will Help You Ace Your Certification

CCNA 200-125 Real Exam Questions That Will Help You Ace Your Certification

Are you preparing for the CCNA 200-125 certification exam? Look no further! In this blog post, we have compiled a list of real exam questions that will help you ace your certification. These questions cover the key topics and concepts you need to know to pass the exam with flying colors. So, let’s dive right in!

Question 1:

What is the purpose of the Spanning Tree Protocol (STP) in a network?

Answer: The Spanning Tree Protocol (STP) is used to prevent loops in a network by creating a loop-free logical topology. It ensures that there is only one active path between any two network devices, thereby preventing broadcast storms and improving network reliability.

Question 2:

What are the different types of network address translation (NAT) available?

Answer: There are three types of NAT:

  • Static NAT: Maps one internal IP address to one external IP address.
  • Dynamic NAT: Maps a pool of internal IP addresses to a pool of external IP addresses.
  • Port Address Translation (PAT): Maps multiple internal IP addresses to a single external IP address using different port numbers.

Question 3:

Explain the difference between TCP and UDP protocols.

Answer: TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both transport layer protocols, but they have several differences.


  • Provides reliable, connection-oriented communication.
  • Guarantees delivery of data and eliminates duplicate packets.
  • Uses sequencing and acknowledgment mechanisms.
  • Slower than UDP due to the overhead of these mechanisms.


  • Provides unreliable, connectionless communication.
  • Does not guarantee delivery of data or packet sequencing.
  • Does not use acknowledgments.
  • Faster than TCP as it does not have the overhead of these mechanisms.

Question 4:

What is the purpose of the Access Control List (ACL) in a network?

Answer: The Access Control List (ACL) is used to control network traffic by permitting or denying packets based on a set of defined rules. It can be applied on routers and switches to filter traffic based on source/destination IP addresses, protocols, or port numbers, providing security and controlling network access.

Question 5:

What is the function of the Dynamic Host Configuration Protocol (DHCP) in a network?

Answer: DHCP is used to assign IP addresses dynamically to network devices. It eliminates the need for manual IP configuration, making it easier to manage and scale a network. DHCP servers lease IP addresses to clients for a specific period, ensuring efficient allocation of network resources.

Question 6:

What are the advantages of using VLANs (Virtual Local Area Networks) in a network?

Answer: VLANs provide the following advantages:

  • Efficient use of network resources by grouping users logically, even if they are physically located on different switches.
  • Enhanced security by isolating sensitive traffic from the rest of the network.
  • Improved network performance by reducing broadcast traffic within VLANs.
  • Simplified network management as VLANs can be easily reconfigured without physical changes.

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