Cisco 642-845 Exam Study Guide
642-845 ONT
Optimizing Converged Cisco Networks
Exam Number: 642-845
Associated Certifications: CCNP
Duration: 90 minutes (50-60 questions)
Available Languages: English, Japanese
642-845 Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.
Describe Cisco VoIP implementations.
* Describe the functions and operations of a VoIP network (e.g., packetization, bandwidth considerations, CAC, etc.).
* Describe and identify basic voice components in an enterprise network (e.g. Gatekeepers, Gateways, etc.)
Describe QoS considerations.
* Explain the necessity of QoS in converged networks (e.g., bandwidth, delay, loss, etc.).
* Describe strategies for QoS implementations (e.g. QoS Policy, QoS Models, etc.).
Describe DiffServ QoS implementations.
* Describe classification and marking (e.g., CoS, ToS, IP Precedence, DSCP, etc.).
* Describe and configure NBAR for classification.
* Explain congestion management and avoidance mechanisms (e.g., FIFO, PQ, WRR, WRED, etc.).
* Describe traffic policing and traffic shaping (i.e., traffic conditioners).
* Describe Control Plane Policing.
* Describe WAN link efficiency mechanisms (e.g., Payload/Header Compression, MLP with interleaving, etc.).
* Describe and configure QoS Pre-Classify.
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