11.9 Network trouble Shooting

Question 1

Localhost

Answer 1

The IP address 127.0.0.1 (also known as the loopback address) is used to verify that the local TCP-IP protocol is installed and working properly.

Question 2

Jitter

Answer 2

Jitter The variation in the latency of VoIP packets.

Question 3

Latency

Answer 3

Latency The amount of time it takes to send a network request and receive a response back.

Question 4

Quality of Service

Answer 4

Quality of Service (QoS) A feature in some routers and switches that assigns priority to different types of network traffic.

Question 5

Port flapping

Answer 5

A problem in which a port on the network switch continuously turns off and on three or more times per second for at least 10 seconds.

Question 6

What should you do first when troubleshooting any network issue?

Answer 6

Check the cable:
Test the cable: Use a cable tester.
Look for lights: Check for blinking lights networks communicating?
Power check: Make sure all network devices, are turned on?

Question 7

What is the localhost IP address?

Answer 7

The local host IP address is typically 127.0.0.1. It’s a standard way for a computer to refer to itself.

Question 8

What are common causes of jitter?

Answer 8

Network congestion.
Using a wireless network for VoIP communication.
Bad hardware.

Question 9

What is the difference between full-duplex and half-duplex?

Answer 9

Full-Duplex Mode: The network adapter can send and receive data at the same time, like having a conversation where both people talk and listen simultaneously.

Half-Duplex Mode: The network adapter can either send or receive data, but not both at once, like taking turns in a conversation.