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PrepAway Cisco CCNA Certification Practice Test Questions Part 9 200-125 Exam
What does the IP SLA ICMP Echo feature measure when utilized in a networking environment?
- A. Packet loss
- B. Frame delay
- C. Route tracking
- D. Late collisions
IP SLAs sends data to hosts to measure the performance between multiple sites and network paths. It calculates the network performance on the basis of network data and IP services that it captures in real time. It ideally monitors traffic from an IOS device to any other device or in between the IOS devices. This can be used to troubleshoot many routing related issues in a network.
For ex. If we have two ISP’s on a router and we name it as ISP1 and ISP2. We want ISP1 to be primary and ISP2 to be primary. What we can do here is that we can configure tracking of an ip address via ISP1. If we do not receive response from that ip address for 3 back to back packets at a specific interval then it will be marked down and an alternate path will be selected. So for instance, we keep a track of the default gateway of the ISP1 and in case it goes down then it will automatically switch to ISP2 and the hosts inside the network will not even know what happened on the internet facing device. We use tracking command while configuring the routes on the router to stay connected to the internet.
So in short the basic idea here is to measure the packet loss.