Title of Exam: 642-321 Cisco Optical SDH

Who is the vendor for 642-321?

CISCO

When completing 642-321 you would have earned credit towards : Cisco Optical Specialist

642-321Exam Description

The 642-321 Cisco Optical SDH exam is the only exam required to achieve a Cisco Optical Specialist certification.

What are the fields covered by 642-321?

The 642-321 Cisco Optical SDH examination covers four broad areas which are discussed in detail below:

Exam area 1 Optical Fundamentals

Describe Light and Fiber Optic Basics (Characteristics of Light, Properties and Components of Optical Fiber, Reflection, Refraction, and Fiber Types)

Exam area 2. Dense Wavelength Division Multiplexing (DWDM) Principles

Explain Dispersion in DWDM Systems (Harmonics, Measuring Dispersion, Effects of Dispersion on Telecom Signals, Polarization Mode Dispersion, Calculating Dispersion Budget)

Describe Optical filters [Characteristics of Filters, Types of filters, Thin Film Filters, Fiber Bragg Grating (FBG)]

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Exam area 3. Service Provisioning, Operation and Troubleshooting (216 DWDM)

Describe the components of the ONS 15216 system, supported configurations, and network applications

Describe the functions and characteristics of the DWDM system created by combining ONS 15454 OC-48 ITU cards and ONS 15216 DWDM filters

Exam area 4 SDH Principles

Given various SDH hierarchy levels, compute the bit rates, identify the main protection switching concepts for SNCP, MS-SPRing, and Linear Configurations.

Compare and contrast SNC and MS-SPRing ring technology (capacity, application, node limiatations, design constraints, traffic flow and APS.)

Exam area 5 Service Provisioning, Operation and Troubleshooting (15454 SDH)

Describe the procedures for configuring a Cisco ONS 15454 in a Data Communications Network.

Describe the shelf layout, shelf hardware, and backplane interfaces

Set the timing parameters in the ONS 15454 from the CTC Timing subtab

Difficulty rating : this examination rates 3 on a scale of 1 - 5 difficulty rating.

How long do I have to complete 642-321?

2-4 hours

How many questions will I be required to answer?

175 and 185 questions

How much will 642-321 cost?

115 USD - Contact the Examination Test Centre directly for information regarding course availability, registration information and cost. Remember that costs may vary from vendor to vendor and from examination to examination.

642-321 Study Tips:

Testking has several products that include excellent materials that will aid in preparation for this exam. Their materials include detailed 642-321study notes and guides, questions and answers with detailed explanations, even practice tests, which were compiled by experts in their respective field. For this examination you can check 642-321 Test King and the 642-321 practice test.

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