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ICND2 – IP SLA Questions

October 10th, 2017 in ICND2 200-105 Go to comments

Question 1

Explanation

The ICMP Echo operation measures end-to-end response time between a Cisco router and any devices using IP. Response time is computed by measuring the time taken between sending an ICMP Echo request message to the destination and receiving an ICMP Echo reply. Many customers use IP SLAs ICMP-based operations, in-house ping testing, or ping-based dedicated probes for response time measurements.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipsla/configuration/15-mt/sla-15-mt-book/sla_icmp_echo.html

Question 2

Comments (5) Comments
  1. Kumo
    April 28th, 2017

    for Q2:
    An IP LSA ICMP-Echo operation can measure 2 facts:
    1. success/failure of the Echo
    2. the RTT

    RTT(round trip time) measures the DELAY from sending the ICMP Echo request until receiving the matching ICMP Echo reply.

  2. zahir
    July 21st, 2017

    that’s all. only two questions

  3. Anonymous
    November 10th, 2017

    What IP SLA ICMP Echo measures?
    A. Packet loss
    B. Congestion
    C. Hop-by-hop “something”
    Dumps says a

    QUESTION 628
    Which function does IP SLA ICMP ECHO operation perform to assist with troubleshooting?
    A. one way jitter measurement
    B. packet-loss detection
    C. hop-by-hop response time
    D. congestion detection

    dumps says c

    Cisco says: An ICMP Path Echo operation measures end-to-end and hop-by-hop response time between a Cisco device and other devices using IP

    Is the answer in first question wrong?

  4. CCNA2017
    November 19th, 2017

    Question 2, Answer is not B because:

    Cisco clearly states that:
    ICMP Echo –> Measures round-trip delay for the full path.

    Soure: https://www.cisco.com/c/en/us/td/docs/ios/12_4/ip_sla/configuration/guide/hsla_c/hsoverv.html

  5. Go Link State
    December 11th, 2017

    One side Delay = RRT/2