A user reports that they cannot access a server at 10.10.10.50. You run `ping 10.10.10.50` and receive 'Destination host unreachable' from the default gateway. What is the MOST likely cause?

The gateway has no route to the 10.10.10.0/24 network.

The server's firewall is blocking ICMP.

The user's workstation has a misconfigured IP address.

A network engineer is troubleshooting a VoIP quality issue. Users report choppy audio. The engineer runs `ping -t` to the VoIP server and sees consistent 1 ms responses with 0% loss. However, the issue persists. What should the engineer do next?

Run `tracert` to see if any hop has high latency.

Run a continuous ping with larger packet sizes to stress the link.

Conclude that the network is healthy and the issue is with the VoIP phones.

Use a VoIP-specific diagnostic tool or check the router's QoS statistics for jitter and packet loss on the UDP port used by VoIP.

You are troubleshooting intermittent connectivity to a server at 192.168.1.10. You run `ping 192.168.1.10 -n 20` and see the following results: 15 replies with times between 1 ms and 5 ms, and 5 'Request timed out' messages. What is the MOST likely cause?

The server's firewall is blocking all ICMP traffic.

The workstation's IP address is misconfigured.

There is intermittent packet loss on the network path.

A network administrator is troubleshooting a connectivity issue between two sites connected by a VPN tunnel. From Site A, they run `ping 10.20.30.1` (a server at Site B) and get 'Request timed out'. They then run `ping 10.20.30.1 -f -l 1472` and get 'Packet needs to be fragmented but DF set'. What is the MOST likely cause?

The server's firewall is blocking ICMP.

The VPN tunnel has a lower MTU than the default 1500 bytes.

A user pings a remote server and receives 'Request timed out' for every packet. What does this result most likely indicate?

The local host's IP address is misconfigured

The destination is reachable but has high latency

No ICMP echo reply was received within the timeout period

The DNS server is not resolving the hostname

CiscoCertified Support Technician (CCST) Networking

Domain 5Objective 3

5.3. Run Basic Diagnostic Commands and Interpret the Results. 100-150 Practice Questions (Page 6)

Part of the Diagnosing Problems domain, which makes up ~21% of our current practice bank. Cisco does not publish an official question count, but from its 50-minute exam (~20–35 total, ~4–7 in this domain), expect 1–1 from this objective — we provide 39 practice questions to prepare you well beyond it. (estimate)

39questions here

8free pages

9concepts

Questions 26–30

26application · medium
A user reports that they cannot access a server at 10.10.10.50. You run `ping 10.10.10.50` and receive 'Destination host unreachable' from the default gateway. What is the MOST likely cause?
Select an answer first
27expert · hard
A network engineer is troubleshooting a VoIP quality issue. Users report choppy audio. The engineer runs `ping -t` to the VoIP server and sees consistent 1 ms responses with 0% loss. However, the issue persists. What should the engineer do next?
Select an answer first
28application · medium
You are troubleshooting intermittent connectivity to a server at 192.168.1.10. You run `ping 192.168.1.10 -n 20` and see the following results: 15 replies with times between 1 ms and 5 ms, and 5 'Request timed out' messages. What is the MOST likely cause?
Select an answer first
29expert · hard
A network administrator is troubleshooting a connectivity issue between two sites connected by a VPN tunnel. From Site A, they run `ping 10.20.30.1` (a server at Site B) and get 'Request timed out'. They then run `ping 10.20.30.1 -f -l 1472` and get 'Packet needs to be fragmented but DF set'. What is the MOST likely cause?
Select an answer first
30foundation · easy
A user pings a remote server and receives 'Request timed out' for every packet. What does this result most likely indicate?
Select an answer first

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