5.5 - CompTIA A+ Core 1

No wireless connectivity issue resolution

Ensure you have a link light, ping the loopback address, ping your local IP, ping the default gateway, ping an external IP

Intermittent wireless connectivity resolution

Switch to a low-interference frequency, move closer to an access point, switch to another channel, move access point to a central location.

Slow network speeds issue resolution

Validate network connectivity via ping/speed tests, evaluate connectivity on each network hop, packet captures to evaluate speeds

Jitter

Refers to the time between frames/packets over a network; excessive quantities can cause loss of information.

Poor VoIP quality resolution

Check Internet connectivity/speed tests, upgrade networking equipment, use a packet capture to check network performance

Limited network connectivity range

Check local/device IP for correct DHCP assignment, ping a local gateway, ping a remote IP address

Port flapping

Occurs when a network interface has intermittent availability (link light flashes on and off).

Port flapping issue resolution

Verify the cable used in the patch panel is in good condition, move cables between switch interfaces, replace bad hardware/cables

Latency

Delay between network requests and responses.

High latency issue resolution

Examine response times at network hops, use packet captures to examine latency times

External Interference issue resolution

Use a network performance monitor to track the signal-to-noise ratio (SNR).

Authentication failures resolution

Attempt to log out and log back in, use packet captures to authentication failures are the issue.

Intermittent internet connectivity issue resolution

Use recurring pings/captures to detect poor network connectivity, work with a third-party provider/ISP, and check your service-level agreement for downtime stats.