Question

Which statement is true about Cisco IOS ping indicators?​


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'!' indicates that the ping was unsuccessful and that the device may have issues finding a DNS server.

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'U' may indicate that a router along the path did not contain a route to the destination address and that the ping was unsuccessful.

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'.' indicates that the ping was successful but the response time was longer than normal.

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A combination of '.' and '!' indicates that a router along the path did not have a route to the destination address and responded with an ICMP unreachable message.​

Answer 1

The correct statement about Cisco IOS ping indicators is:

**A combination of '.' and '!' indicates that a router along the path did not have a route to the destination address and responded with an ICMP unreachable message.**

Here’s a breakdown of the indicators for clarity:

- A `.` indicates that the ping was successful (it received a response).
- A `!` indicates that the ping was unsuccessful (the destination was unreachable).
- A `U` indicates that the ping was unsuccessful due to an unreachable network, but it specifically suggests an upstream routing issue.

Therefore, the option regarding the combination of `.` and `!` is the most accurate as it describes a situation where some pings were successful while others failed, implicating routing issues.