5.7 Given a scenario, troubleshoot problems with wired and wireless networks

Intermittent wireless connectivity

• interference

• signal strength

• incorrect channel

• bounce and latency

• incorrect access point placement

Limited connectivity

• Windows alert in the system tray

• check the local IP address

• if DHCP address is obtained, perform ping tests

Jitter

• most real-time media is sensitive to delay

• if you miss a packet, there’s no retransmission

• time between frames

• can cause “choppy” voice calls

Poor VoIP quality

• high speed and low latency

• check Internet connection

• verify the local networking equipment

• view the network performance

High latency

• delay between the request and response

• some is expected and normal

• examine the response times at every step along the way

Port flapping

• network interface goes up and down

• verify the cable

• move between switch interfaces

• replace bad hardware or cables