N10-009 Network Operations 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.

• ✗

  SNMP

  Why it's wrong here

  Simple Network Management Protocol (SNMP) is an application-layer protocol designed for managing and monitoring network devices from a central location. It requires prior knowledge of a device's IP address and a configured community string or credentials to query its Management Information Bases (MIBs) for operational data. SNMP is a pull-based management tool, not an autonomous discovery mechanism that automatically identifies and gathers detailed information about unknown, directly connected neighbors.

  When this WOULD be correct

  When the question asks for a protocol to monitor network performance, collect statistics, or manage device configurations across a network, SNMP is the correct choice.

• ✓

  LLDP

  Why this is correct

  Link Layer Discovery Protocol (LLDP) is a vendor-neutral, Layer 2 protocol that allows network devices to advertise their identity, capabilities, and other information to directly connected neighbors. By sending periodic advertisements containing Type-Length-Value (TLV) elements, LLDP enables automatic discovery of device type, port ID, management IP, and VLAN information. This capability is crucial for network topology mapping and troubleshooting without requiring manual configuration.

• ✗

  ICMP

  Why it's wrong here

  Internet Control Message Protocol (ICMP) operates at Layer 3 and is primarily used for diagnostic purposes and error reporting within an IP network. While tools like ping and traceroute utilize ICMP to check IP reachability and trace routes, it does not provide detailed information about the identity, capabilities, or specific port connections of directly attached hardware devices. ICMP's function is to report on the operational status of IP communications, not to discover neighbor attributes.

  When this WOULD be correct

  A question asking which protocol is used to test reachability or measure round-trip time between two hosts would make ICMP correct, e.g., 'Which protocol does the ping command use?'

• ✗

  ARP

  Why it's wrong here

  Address Resolution Protocol (ARP) is a Layer 2 protocol responsible for resolving an IP address to its corresponding Media Access Control (MAC) address within a local broadcast domain. Its sole function is to facilitate communication by mapping IP addresses to physical hardware addresses for devices on the same subnet. ARP does not provide any information about the device's vendor, model, capabilities, or the specific port it's connected to, making it unsuitable for comprehensive neighbor discovery.

  When this WOULD be correct

  When the question asks for the protocol used to resolve a known IP address to its corresponding MAC address on a local network segment, ARP is the correct answer.

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?”