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JN0-102 · Question #302

Referring to the exhibit, which statement is correct? traceroute to 10.1.15.2 (10.1.15.2), 30 hops max, 40 byte packets 1 10.1.36.1 (10.1.36.1) 0.651 ms 7.834 ms 0.506 ms 2 10.1.23.1 (10.1.23.1) 0.5…

The correct answer is C. The asterisks indicate a response time out. In traceroute output, asterisks (***) indicate that no response was received from the corresponding hop within the default timeout period.

Operational Monitoring and Maintenance

Question

Referring to the exhibit, which statement is correct? traceroute to 10.1.15.2 (10.1.15.2), 30 hops max, 40 byte packets 1 10.1.36.1 (10.1.36.1) 0.651 ms 7.834 ms 0.506 ms 2 10.1.23.1 (10.1.23.1) 0.5 ms 0.5 ms 0.5 ms 3 * * * 4 * * *

Options

  • AThe packets have exceeded the time-to-live value.
  • BThere is a loop.
  • CThe asterisks indicate a response time out.
  • DThe asterisks indicate that the traceroute is completed.

How the community answered

(29 responses)
  • A
    7% (2)
  • B
    3% (1)
  • C
    86% (25)
  • D
    3% (1)

Why each option

In traceroute output, asterisks (***) indicate that no response was received from the corresponding hop within the default timeout period.

AThe packets have exceeded the time-to-live value.

While a TTL value might have expired for the packet, the asterisks themselves directly signify a timeout (no response), not specifically that the TTL was exceeded.

BThere is a loop.

A loop would typically show the same IP addresses repeatedly, not just timeouts, unless the loop leads to a black hole where no responses are sent back.

CThe asterisks indicate a response time out.Correct

In a traceroute utility, asterisks (`* * *`) for a given hop indicate that the probe packets sent to that hop did not elicit any response within the configured timeout period, meaning a response timed out.

DThe asterisks indicate that the traceroute is completed.

The asterisks indicate a failure to receive a response, not that the traceroute has completed; completion is indicated by reaching the destination or exceeding the maximum hop count.

Concept tested: Interpreting traceroute output

Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fbook/configuration/xe-3s/f_ipapp-xe-3s-book/ipapp_fbook_chap010.html

Topics

#traceroute#network diagnostics#troubleshooting

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