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642-641

Cisco Certified Internetwork Professional

Quality of Service Exam (QoS 642-641)

  
 
Exam Number:     642-641
Associated Certifications: CCIP
Available Languages: English
 
 
642-641 Braindumps

Exam Description

Exam Topics
Recommended Training

 
 

 Exam Description

   
 
QoS is a qualifying exam for the Cisco Certified Internetwork Professional CCIP certification. The QoS exam (642-641) will test materials covered under the Implementing Quality of Service (IQoS) course. The exam will certify that the successful candidate has knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in a Service Provider environment. The exam covers topics on IP QoS, classification and marking Mechanisms, queuing mechanisms, traffic shaping and policing mechanisms, congestion avoidance mechanisms, link efficiency mechanisms, signaling mechanisms, modular QoS command line interface, and QoS & IP over ATM.

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Exam Topics
The following information provides general guidelines for the content likely to be included on the QoS exam. However, other related topics may also appear on any specific delivery of the exam.

Introduction to IP Quality of Service

Describe the need for IP QoS
Describe the Integrated Services model
List the key benefits and drawbacks of the IntServ model
Describe the Differentiated Services model
List the key benefits of the DiffServ model compared to the IntServ model
Describe the interoperability between DSCP-based and IP-precedence-based devices in a network
Describe the building blocks of IP QoS mechanisms (classification, marking, metering, policing, shaping, dropping, forwarding, queuing)
List the IP QoS mechanisms available in the Cisco IOS
Describe what QoS features are supported by different IP QoS mechanisms

Classification and Marking Mechanisms

Describe Policy-based routing and how it can be used to classify and mark IP packets
Configure the Policy-based routing mechanism on Cisco routers
Describe QoS Policy Propagation through BGP and how it can be used to classify and mark IP packets
List other mechanisms that also support classification and marking capabilities (Committed Access Rate, Class-based Marking)

Queuing Mechanisms

Describe how queuing works on Cisco routers
Describe FIFO Queuing (FQ) and its benefits and drawbacks
Describe Priority Queuing (PQ) including its benefits and drawbacks
Configure Priority Queuing (PQ) on Cisco routers
Describe Custom Queuing (CQ) including its benefits and drawbacks
Configure Custom Queuing (CQ) on Cisco routers
Describe Weighted Fair Queuing (WFQ) including its benefits and drawbacks
Configure Weighted Fair Queuing (WFQ) on Cisco routers
Describe different distributed Weighted Fair Queuing (dWFQ) mechanisms available on Cisco IOS routers
Describe Modified Deficit Round Robin (MDRR) queuing
Describe IP RTP Prioritization
Configure IP RTP Prioritization on Cisco routers

Traffic Shaping and Policing Mechanisms

Describe shaping and policing mechanisms available in Cisco IOS
Describe the benefits and drawbacks of traffic shaping and policing mechanisms
Describe Generic Traffic Shaping (GTS) on Cisco routers
Configure GTS on Cisco routers
Describe Frame Relay Traffic Shaping (FRTS) and its differences from GTS
Configure Frame Relay Traffic Shaping (FRTS) on Cisco routers
Describe the Committed Access Rate (CAR) mechanism including its benefits and drawbacks
Configure Committed Access Rate (CAR) on Cisco Routers

Congestion Avoidance Mechanisms

Describe Random Early Detection (RED)
Describe the Weighted Random Early Detection (WRED) mechanism
Configure Weighted Random Early Detection (WRED) on Cisco routers
Describe the Flow-based WRED mechanism

Link Efficiency Mechanisms

Describe payload compression and payload compression algorithms available on Cisco routers
Describe header compression and header compression algorithms available on Cisco routers
Configure Cisco IOS header compression mechanisms
Describe Link Fragmentation and Interleaving (LFI)
Configure Link Fragmentation and Interleaving (LFI) mechanisms on Cisco IOS routers

Signaling Mechanisms

Describe Resource Reservation Protocol (RSVP)
Configure RSVP on Cisco IOS routers

Modular QoS Command Line Interface

Describe the Modular QoS CLI (MQC) concept and its structure
Describe Modular QoS CLI classification options
Configure the Modular QoS CLI to perform classification
Describe Network-based Application Recognition (NBAR)
Describe Modular QoS CLI policy options
Configure the Modular QoS CLI to perform service policies

QoS and IP over ATM

List the requirements of IP QoS in combination with ATM QoS
Describe per-VC queuing
Describe and configure per-VC WRED
Describe and configure per- VC CB-WRQ
 

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Recommended Training

   

Implementing Cisco MPLS (MPLS) is the recommended training for this exam.

Courses listed are offered by Cisco Learning Partners—the only authorized source for Cisco IT training   delivered exclusively by Certified Cisco Instructors.
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Index
 

640-910  |  642-641  |  642-661  |  642-801