Cisco CCNA mock exam questions sample test – Question 335

.You have implemented the following IP SLA configuration, as shown in the following partial output of the show run command:
ip sla 1
dns cow.cisco.com name-server 10.52.128.30
ip sla schedule 1 start-time now
Which of the following statements is true of this configuration?

A. It will find the response time to resolve the DNS name cow.cisco.com
B. It will find the response time to connect to the DNS server at 10.52.128.30
C. It will start in one minute
D. It will gather data from one minute


Correct Answer: A

Explanation:
It will find the response time to resolve the DNS name cow.cisco.com. Domain Name System (DNS) response time is computed by calculating the difference between the time taken
to send a DNS request and the time a reply is received. The Cisco IOS IP SLAs DNS operation queries for an IP address if the user specifies a hostname, or queries for a hostname if
the user specifies an IP address.
It will not find the response time to connect to the DNS server at 10.52.128.30. That is the IP address of the DNS server being used for the operation (10.52.128.30). However, it will
measure the response time to resolve the DNS name cow.cisco.com.
It will not start in one minute. It will start immediately, as indicated by the start-time now parameter.
It will not gather data for one minute. The numeral 1 in the first line refers to the IP SLA number, and the numeral 1 in the last line refers to the IP SLA number to be scheduled.
Objective:
Infrastructure Management
Sub-Objective:
Troubleshoot network connectivity issues using ICMP echo-based IP SLA
References:
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