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 network protocol that prevents looping in Ethernet networks by intelligently blocking redundant paths. Its primary function is to ensure a loop-free logical topology, thereby preventing broadcast storms, MAC address table instability, and multiple frame copies that can cripple a network. While essential for network stability and preventing outages caused by redundant paths, STP operates by managing these links and does not combine or virtualize multiple switches into a single logical device for management or forwarding purposes.

  When this WOULD be correct

  A question asking which protocol prevents bridging loops in a network with redundant links, or which IEEE standard (802.1D) is used for loop-free topology in switched networks.

• ✓

  Switch stacking

  Why this is correct

  Switch stacking is a technology that physically connects multiple individual switches using dedicated high-speed stacking cables and ports, allowing them to operate as a single logical unit. This configuration provides a unified management plane, simplifying administration and increasing port density while offering enhanced redundancy and a shared backplane for high-speed inter-switch communication. It effectively creates a single, more resilient, and scalable switch from several smaller devices, which is crucial for high-availability data center designs.

• ✗

  EtherChannel

  Why it's wrong here

  EtherChannel, also known as Link Aggregation Group (LAG) or port channeling, aggregates multiple physical Ethernet links between two network devices, such as switches or a switch and a server, into a single logical channel. This aggregation significantly increases the total bandwidth available and provides link-level redundancy, distributing traffic across the bundled links. However, EtherChannel's function is limited to link aggregation for increased throughput and resilience over a single connection, and it does not consolidate multiple switches into a unified management plane or a single logical switch.

  When this WOULD be correct

  A network engineer needs to increase bandwidth and provide link redundancy between two switches. Which technology allows multiple physical links to be aggregated into a single logical link?

• ✗

  Virtual Router Redundancy Protocol (VRRP)

  Why it's wrong here

  Virtual Router Redundancy Protocol (VRRP) is a Layer 3 protocol designed to provide automatic failover for default gateways, ensuring high availability for hosts on a subnet. It achieves this by presenting a virtual IP address and MAC address that can be shared by a group of physical routers, with one acting as the master and others as backups. While crucial for router redundancy and ensuring continuous network access, VRRP does not combine multiple switches into a single logical entity or management domain.

  When this WOULD be correct

  A network engineer needs to ensure high availability for the default gateway in a subnet. Which protocol allows multiple routers to share a virtual IP address, providing redundancy if one router fails?

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?”

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