NETWORK NINJAS
A switchport shows “Input errors, CRCs, and frame errors climbing, but no collisions.”
This specific condition tells you the errors are happening on which side of the link?
What is the customer/device side (the receive side)?
Microwaves, baby monitors, and older cordless phones all cause issues on this Wi-Fi spectrum.
What is 2.4 GHz interference?
This country is the largest in the world by landmass.
What is Russia?
You notice CRC errors climbing on a customer’s port. This Layer-1 issue is the most likely culprit.
What is a bad cable?
A customer has great RSSI but low throughput on multiple devices. This AP metric is the one you should check first.
What is channel utilization?
This city has the most people in the world inside its metro area.
What is Tokyo?
The customer is online, but devices are getting wrong DNS responses. This Layer-3/4 tool tests DNS resolution directly.
What is nslookup?
Random drops happen every few minutes. Logs show MAC flaps between two switch ports. What’s the root cause?
What is a loop / device connected to two ports?
This country currently has the world’s largest active military force by personnel.
What is China?