Network Troubleshooting and Performance Concepts

The video tutorial covers troubleshooting network connectivity issues, starting with basic checks like link lights and pinging the loopback address. It addresses wireless network problems, including interference and signal strength, and explains the importance of the signal-to-noise ratio. The tutorial also discusses IP address configuration, real-time communication challenges like jitter and latency, and physical issues such as port flapping.

What is the first step in troubleshooting a network connectivity issue?

• Check the wireless signal strength

• Verify the link light on the Ethernet interface

• Ping Google's DNS server

• Check the default gateway

What IP address is used to test the loopback interface?

• 8.8.8.8

• 9.9.9.9

• 192.168.1.1

• 127.0.0.1

Which IP address can be used to test internet connectivity?

• 10.0.0.1

• 8.8.8.8

• 192.168.0.1

• 127.0.0.1

What might cause intermittent connectivity on a wireless network?

• Interference from other devices

• A solid link light

• A wired connection

• A high signal-to-noise ratio

What can be adjusted to improve wireless network performance?

• The Ethernet cable

• The loopback address

• The default gateway

• The wireless channel

What does a high signal-to-noise ratio indicate?

• Low signal strength

• High interference

• Good network performance

• Poor network performance

What is jitter in the context of network performance?

• The strength of a wireless signal

• The total bandwidth used by a network

• The variation in time between packets arriving

• The time it takes for a packet to travel from source to destination

What is a common symptom of port flapping?

• Low signal-to-noise ratio

• High bandwidth usage

• Intermittent link light

• A stable link light

What tool can be used to capture and analyze network packets?

• A packet sniffer

• A cable tester

• A DHCP server

• A wireless router

What is the primary cause of latency in a network?

• High bandwidth

• Long distances between devices

• High signal-to-noise ratio

• Low signal strength