N10-009 Network Implementation Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Spanning Tree Protocol (STP)

  Why it's wrong here

  Spanning Tree Protocol (STP) is a Layer 2 protocol designed to prevent switching loops in redundant network topologies by intelligently blocking redundant paths. It ensures that only one active path exists between any two network devices, thereby avoiding broadcast storms, MAC address table instability, and multiple frame copies. STP's role is solely to manage redundant links for loop prevention, not to logically segment a switch into multiple broadcast domains.

  When this WOULD be correct

  A question asking which protocol prevents bridging loops in a redundant switched network would have STP as the correct answer, e.g., 'Which technology ensures a loop-free topology in a network with redundant switches?'

• ✓

  Virtual LAN (VLAN)

  Why this is correct

  A Virtual LAN (VLAN) is a logical grouping of network devices that allows a single physical switch to be segmented into multiple distinct broadcast domains. By assigning specific switch ports or even hosts to different VLANs, broadcast traffic originating within one VLAN is strictly confined to only the devices belonging to that same VLAN. This effectively isolates network segments, significantly improving security, reducing unnecessary network traffic, and enhancing network performance without requiring additional physical switches.

• ✗

  VLAN Trunking Protocol (VTP)

  Why it's wrong here

  VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol designed to manage and synchronize VLAN configurations across multiple switches within a single VTP domain. Its primary function is to propagate VLAN changes, such as creation, deletion, or renaming, from a VTP server to client switches, ensuring consistent VLAN definitions across the network. However, VTP itself does not create or segment broadcast domains; it merely facilitates the administrative management of existing or newly defined VLANs.

• ✗

  Access Control List (ACL)

  Why it's wrong here

  An Access Control List (ACL) is a set of rules configured on a router or Layer 3 switch to filter network traffic based on criteria such as source/destination IP addresses, port numbers, or protocols. While ACLs are crucial for network security and traffic management by permitting or denying specific packets, they operate at Layer 3 and above in the OSI model. They do not segment a network into separate broadcast domains, which is fundamentally a Layer 2 function.

  When this WOULD be correct

  A question asking 'Which technology can be used to restrict traffic between two subnets on a router?' would make ACLs correct, as they filter packets based on rules.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”