CompTIA Network+ Practice Test

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Prepare for the CompTIA Network+ Exam with interactive quizzes, flashcards, and detailed explanations. Enhance your networking knowledge and ace your certification test with confidence!

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Which command is primarily used to test reachability and determine round-trip time?

Traceroute
Ping
Nmap
Sniffer

The correct answer is: Ping

The command used to test reachability and determine round-trip time is Ping. This utility operates by sending Internet Control Message Protocol (ICMP) Echo Request messages to a target host and waiting for an ICMP Echo Reply. By doing this, Ping measures the time it takes for the packets to travel to the destination and back, providing essential information on network latency and connectivity. This makes it particularly useful for diagnosing network issues, as it can confirm whether a host is accessible and how long it takes for data to travel back and forth, which is critical for performance monitoring and troubleshooting. In contrast, Traceroute is used to identify the path packets take to reach a destination, detailing the hops along the way rather than measuring round-trip time directly. Nmap is a network scanning tool that is primarily used for discovering hosts and services on a network, while a Sniffer is a tool that captures and analyzes packet data flowing over the network, focusing more on the content of the packets rather than the reachability and latency aspects addressed by Ping.