ping for connectivity testing in Linux CLI - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the ping command do in Linux?

The ping command checks if a computer or server is reachable over a network by sending small data packets and waiting for a reply.

beginner

What is the default behavior of ping when you run it without options?

It sends continuous packets to the target until you stop it manually (usually with Ctrl+C).

beginner

How can you limit the number of ping requests sent?

Use the -c option followed by the number of packets you want to send, for example: ping -c 4 example.com sends 4 packets.

intermediate

What does 100% packet loss mean when using ping?

It means the target did not respond to any packets, possibly due to network issues or the target blocking ping requests.

beginner

Why is ping useful before troubleshooting network problems?

Because it quickly shows if the target device is reachable and how long data takes to travel, helping identify where problems might be.

What option limits the number of ping packets sent?

A -t

B -c

C -n

D -l

The -c option specifies the count of packets to send.

What does it mean if ping shows Destination Host Unreachable?

A The network cable is unplugged on your computer

B The ping command is not installed

C The target is offline or unreachable

D The target replied successfully

This message means your computer cannot reach the target device.

How do you stop a continuous ping command in the terminal?

A Press Ctrl+C

B Press Ctrl+Z

C Close the terminal window

D Type 'stop'

Ctrl+C interrupts and stops the running ping command.

Which of these is NOT a typical use of ping?

A Transfer files between computers

B Check if a website is reachable

C Measure round-trip time for packets

D Detect network connectivity issues

Ping does not transfer files; it only tests connectivity.

What does a low ping time indicate?

A Packet loss

B Slow connection

C No connection

D Fast and responsive connection

Low ping time means data travels quickly between devices.

Explain how you would use the ping command to check if a website is reachable and limit the test to 5 packets.

Think about the command syntax and option to limit packets.

Describe what information the ping command output gives you and why it is helpful for network troubleshooting.

Focus on what ping tells you about the connection.