6 Network Performance Problems Free Online FlashCards

What should you record when establishing a network-performance baseline?

Record which devices or applications are affected, when the problem occurs, and whether it happens on one or several devices.

What can comparing Wi-Fi and Ethernet performance reveal?

Better performance over Ethernet points toward a Wi-Fi or radio-frequency issue. Similar trouble on both connections suggests investigating the shared network path or service.

In what order should you test network performance along the path?

Test progressively: first the local router, then a reliable remote host, and finally the affected application or service.

Why can ping results fail to reflect application performance?

Ping tests ICMP, not necessarily the application. Some devices limit or deprioritize ICMP replies, so confirm suspected problems with an application-level test or monitoring data.

What does round-trip time measure?

Latency is the time data takes to travel between endpoints; round-trip time (RTT) measures a trip there and back.

How can jitter affect voice and video?

Jitter is variation in delay. It can disrupt voice and video even when average latency seems acceptable.

What is packet loss, and why can it matter?

Packet loss occurs when packets fail to reach their destination. It can trigger retransmissions and reduce application performance.

How do bandwidth and throughput differ?

Bandwidth is a connection's capacity; throughput is the rate actually achieved.

What is network congestion, and what performance changes can it cause?

Congestion occurs when traffic demand competes for limited capacity or airtime. It can lower throughput and raise latency during busy periods.

Why does a high Wi-Fi client count alone not prove congestion?

A large client count alone does not prove congestion; check client activity and wireless-channel utilization.

Which wireless conditions can degrade Wi-Fi performance?

Weak signal, obstacles, interference, competing networks, and busy airtime can cause lower rates, retries, delay, and unstable connections.

What should you investigate if several nearby devices have Wi-Fi trouble?

If several devices near one access point are affected, investigate that access point's radio conditions and load.