Implementing Quality of Service (QoS) Module 1 Lesson 1 Review http://www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 1 What is the best method for solving the bandwidth shortage on a link? a. Upgrade the link b. Use an advanced queuing strategy c. Compress payloads d. Compress headers Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 1 - Answer What is the best method for solving the bandwidth shortage on a link? a. Upgrade the link b. Use an advanced queuing strategy c. Compress payloads d. Compress headers Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 2 Match the type of delay with the correct definition: Processing Delay Queuing Delay Propagation Delay Serialization Delay Packetization Delay Time from input interface to output Time in output queue Time spent on wire Time to put bits on wire Time to convert data to packets Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 2 - Answer Match the type of delay with the correct definition: Serialization Delay Packetization Delay Queuing Delay Processing Delay Propagation Delay Time from input interface to output Time in output queue Time spent on wire Time to put bits on wire Time to convert data to packets a. 4 b. 5 c. 2 d. 1 e. 3 Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 3 What is the most common reason for packet loss in a network? a. Tail drop b. Ignore c. Overrun d. Frame Error Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 3 - Answer What is the most common reason for packet loss in a network? a. Tail drop b. Ignore c. Overrun d. Frame Error Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 4 Some service providers overprovision their bandwidth to avoid the configuration of complex QoS mechanisms. Identify a drawback of this design philosophy. The customer edge (CE) router must implement multiple QoS mechanisms. The provider edge (PE) router must implement multiple QoS mechanisms. The unpredictability of traffic resulting from the lack QoS mechanisms in the service provider’s core results in a higher probability of network congestion. The service provider’s recurring expenses are higher for an overprovisioned network as opposed to a QoS-enabled network. Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 4 - Answer Some service providers overprovision their bandwidth to avoid the configuration of complex QoS mechanisms. Identify a drawback of this design philosophy. The customer edge (CE) router must implement multiple QoS mechanisms. The provider edge (PE) router must implement multiple QoS mechanisms. The unpredictability of traffic resulting from the lack QoS mechanisms in the service provider’s core results in a higher probability of network congestion. The service provider’s recurring expenses are higher for an overprovisioned network as opposed to a QoS-enabled network. Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 5 Which of the following types of delay is considered to be a variable delay? serialization delay queuing delay processing delay propagation delay Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 5 - Answer Which of the following types of delay is considered to be a variable delay? serialization delay queuing delay processing delay propagation delay Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 6 The three primary quality issues that QoS mechanisms address are: (1) Packet Loss, (2) Jitter, and (3) Delay. Which two of the following mechanisms can be used to reduce packet loss for your higher priority traffic? (Choose 2) Increase link speed Use WRED Decrease the size of the dejitter buffer Police all flows Copyright © 2010 Internetwork Expert, Inc www.INE.com
Copyright © 2010 Internetwork Expert, Inc Question 6 - Answer The three primary quality issues that QoS mechanisms address are: (1) Packet Loss, (2) Jitter, and (3) Delay. Which two of the following mechanisms can be used to reduce packet loss for your higher priority traffic? (Choose 2) Increase link speed Use WRED Decrease the size of the dejitter buffer Police all flows Copyright © 2010 Internetwork Expert, Inc www.INE.com