96 Practice 12.6 For each of the following select the word that best completes the sentence. Terms may be used more than once. nudio device configuration connection failure firewall impedance mismatch jitter latency protocol analyser 1. One of the most common causes of VoIP echo is 2. A common example of is connecting a two-wire local-loop telephone circuit to a four-wire telephone circuit. 3. One of the most common sources of VoIP problems is the computer's blocking the packets. 4. Performance issues are typically caused by and 5. A complete failure of the VoIP system generally relates to a(n). between the destination and source. 6. Another reason for complete failure of the VoIP system could be due to the microphone speaker, or headset. in other words, the 7. Dropping or losing packets causes and results in a choppy voice transmission 8. A(n) can be used to verify the exchange of packets needed to support a VoIP service