← ACARA Digital Technologies Years 9–10

The ping command

A command that sends a small test message to another device and reports whether it replied and how long the reply took in milliseconds. Example: ping 8.8.8.8

Understanding The ping command in ACARA Digital Technologies Years 9–10

What it does: ping works with a domain name too. DNS turns the name into an IP address, then the test message is sent. This message means no reply came back in time. The device may be offline, unreachable or blocking pings. Reply time is how long the round trip took, shown in milliseconds (ms). Megabytes measure data size. Replies show that the device can be reached. They say nothing about how secure it is. An IPv4 address needs four numbers separated by dots, so an incomplete address makes the ping fail.

Common mistakes: Ping reports reply time in milliseconds (ms), not gigabytes. It should be time=13ms. Ping needs a domain name or IP address, not a full URL. Remove http:// and write ping www.example.com.

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Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

This module's key terms are also in a printable crossword (Modules 12–34) and word search (Modules 12–55).

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Learning
Duo
Which command checks whether another device replies and how long it takes?
ping 8.8.8.8print 8.8.8.8
Matches
ping8.8.8.8
↓
There is no space between the command and the address, so the computer reads it as one unknown word. It should be ping 8.8.8.8.
Applying
Meanings
Term
ping address
Meaning
A command that sends a small test message to another device and reports whether it replied and how long the reply took in milliseconds. Example: ping 8.8.8.8
Practice
ping 8.8.8.8
Testing
Gaps
8.8.8.8
Check Answer
Spots
3Reply from 8.8.8.8: time=15ms
4Reply from 8.8.8.8: time=13GB

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Quick Questions

1. Which command checks whether another device replies and how long it takes?
A. ping 8.8.8.8 ✓
B. print 8.8.8.8
ping address sends a small test message to that address and reports if a reply came back.
2. What does ping send to the other device?
A. A copy of all your files
B. A small test message ✓
Ping only sends a tiny test message, not your files or data.
3. Reply time in a ping result is measured in which unit?
A. Megabytes (MB)
B. Milliseconds (ms) ✓
Reply time is how long the round trip took, shown in milliseconds (ms). Megabytes measure data size.
4. Which ping command uses a domain name instead of an IP address?
A. ping google.com ✓
B. ping = google.com
The syntax is ping then a space then the address. A domain name works because DNS turns it into an IP address.
5. A ping shows 'Request timed out'. What does this mean?
A. No reply came back in time ✓
B. The reply came back very fast
A timeout means the test message got no reply in time. The device may be offline or blocking pings.

Match the Pairs

ping 8.8.8.8 → Sends a test message to the IP address 8.8.8.8 and reports whether it replied
Reply from 8.8.8.8: time=24ms → The device answered and the round trip took 24 milliseconds
Ping can test a website by using its domain name instead of an IP address → ping example.com
A ping that gets no answer shows a message saying the request timed out → Request timed out.
ping8.8.8.8 → There is no space between the command and the address, so the computer reads it as one unknown word. It should be ping 8.8.8.8.
ping 8.8.8 → The IP address has only three numbers. An IPv4 address needs four parts, such as 8.8.8.8, so ping cannot find a real device.

Key Term

ping address
A command that sends a small test message to another device and reports whether it replied and how long the reply took in milliseconds. Example: ping 8.8.8.8

Fill in the Blanks

1. ping 8.8.8.8
Hint: Type the command name that sends a small test message to another device.
2. ping 8.8.8.8 Reply from 8.8.8.8: time=24ms
Hint: Type the short unit used to show how long the reply took.
3. ping 8.8.8.8 Request timed out.
Hint: Type the two words that show no reply came back in time.
4. ping example.com
Hint: Type the command that tests a device by its domain name.
5. ping 8.8.8.8 Reply from 8.8.8.8: bytes=32 time=24ms
Hint: Type the address that sent the reply. It is the same device that was pinged.

Spot the Error

Question 1
A ping 8.8.8.8
B Reply from 8.8.8.8: time=14ms
C Reply from 8.8.8.8: time=15ms
D Reply from 8.8.8.8: time=13GB
Line D — Ping reports reply time in milliseconds (ms), not gigabytes. It should be time=13ms.
Question 2
A ping google.com
B Reply from 142.250.1.1: 20ms
C ping http://www.example.com
Line C — Ping needs a domain name or IP address, not a full URL. Remove http:// and write ping www.example.com.
Question 3
A ping 192.168.1.50
B Request timed out.
C Request timed out.
D Sent=2, Received=2, Lost=2
Line D — Both requests timed out, so no replies came back. It should say Received=0, Lost=2.
Question 4
A ping 8.8.8.8
B Reply from 8.8.4.4: time=9ms
C Reply from 8.8.8.8: time=11ms
Line B — The reply must come from the address that was pinged. It should be Reply from 8.8.8.8, not 8.8.4.4.
Question 5
A ping 192.168.1.1
B Reply from 192.168.1.1: 3ms
C ping 8.8.8.256
Line C — Each part of an IPv4 address can only be 0 to 255, so 256 is invalid. It should be ping 8.8.8.8.

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