CompTIA Cloud+ Practice Test

Which command allows verification of IP connectivity with the application tier?

1. arproute

2. netstat

3. tcpdump

4. ping

The correct answer is: ping

The command that allows for verification of IP connectivity with the application tier is the "ping" command. This tool is fundamental in network troubleshooting as it sends Internet Control Message Protocol (ICMP) Echo Request messages to a target host and waits for Echo Reply messages. By using ping, a user can determine if the target IP address is reachable across the network and measure the round-trip time for packets sent from the source to the destination. When assessing connectivity, ping provides immediate feedback on whether the application tier, which may reside on a remote server, is accessible and operational. If the ping command receives echoes back from the application tier, it confirms not only that the device is reachable, but also that it is actively responding, indicating the layer of the network stack is functioning as expected. In contrast, while other commands like "netstat" provide insights into network connections and statistics, they do not actively test IP connectivity. "tcpdump" is a packet analyzer that captures and displays packet data on a network interface but does not provide straightforward connectivity checks. Similarly, "arproute" is used for viewing ARP information and routing, but it is not utilized for connectivity verification like ping. Therefore, when the goal is to confirm the ability to communicate with the