Exam N10-008 topic 1 question 386 discussion

Can you provide photo as it is missing ;]

Hey Admin. Please provide the photo.

What you are receiving in this graph is a high amount of traffic, & minimum ability to send traffic back out which can interrupt the network encryption process & prevent you from properly using SSH due to high collision. Here you have identified the issue as a high collision, from here, you can then move down from top-to-bottom in the troubleshooting process which could lead to finding out that it is a switch loop. https://www.manageengine.com/network-monitoring/tech-topics/switching-loops.html#:~:text=A%20switching%20loop%2C%20or%20bridge,and%20creating%20a%20broadcast%20storm.

it is D

A switch loop typically leads to excessive network traffic and broadcast storms, where packets are continuously circulated within the loop. This results in an increase in the overall packet count, both received and transmitted by the switch. If a switch loop were occurring, the number of received and transmitted packets would be relatively similar or show abnormal spikes.

well, hard question this is. How i see it: No on A because it is stated there is an 100% outage. with a dupIP there would be some possible. It will sort of loadbalance ^^. no on B because there arn't any collisions stated in the output. and also there still would be some network connectivity possible. No on C with an Asyn route you can be pretty (a bad word here), it could result in an outage. but probally not the cause for an full network outage and causing all the communication to stop. so the only answer left is then D. when a loop happens, it can cause the situation that is stated. butt....... the information in the picture should have a high utilisation, if it would cause a network outage. but still even if the (bad)data provided, it is the only one that could cause a full outage. if you have better arguments feel free to add those.

can someone explain how to get the answer it is a collision? thanks

In this scenario, the high number of multicast and broadcast packets being received by the switch (21,456,465 B/Mcast Rx) is a strong indication of a broadcast storm, which is often caused by a switch loop. D is correct

D. Switch loop

Switch loop

That's a broadcast storm most likely caused by a switch loop.

Switching loops also generate broadcast storms, since the broadcast packets are forwarded to every port on the switch; the switch will repeatedly rebroadcast the broadcast messages, thus flooding the network. When this happens on your network, everyone will lose the ability to communicate on the network.

Answer: C Switch Loop Based on the provided information, the most likely cause of the network outage is a switch loop. A switch loop can occur when there is a redundant connection between switches, causing a loop in the network. This can result in high levels of broadcast/multicast traffic, which can cause network congestion and potentially bring down the network. The port statistics show a very high rate of broadcast/multicast packets being received, which supports the possibility of a switch loop. Additionally, the low utilization of the Tx (outgoing) port and the inability to connect via SSH suggests that the switch may be overwhelmed with incoming traffic, causing it to be unresponsive to new requests. Duplicate IP addresses or asynchronous routes can also cause network issues, but they are less likely to result in a complete network outage. High collisions can also be a sign of network congestion, but the provided information does not indicate that collisions are occurring.

A massive amount of broadcast packages points to a switching loop.

a switch loop would cause high collisions as well as other issues just saying