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642-321 — Cisco Optical SDH Exam (SDH) Practice Test Questions is writtenand formatted by Top senior IT Professionals working in today’s prospering companies and data centers.
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642-321 — Cisco Optical SDH Exam (SDH) Practice Test Questions Crack+
The 642-321 exam will test your 642-321 exam knowledge and understanding on the following topics:
QUESTION
Show 2
A
When is the SDH connection between the
optical interfaces established?
ANSWER
QUESTION
What is the minimum wavelength spacing for SDH?
ANSWER
Show 2
A
(In meters)
QUESTION
What is the difference between a SONET OC-48 and a SONET
OC-192 interface?
ANSWER
Show 2
A
SONET OC-192 interface has the following properties:
— SP: 1.25 Gb/s
— OS: 4-byte time slots
— SDH: 1.25 Gb/s bit-interleaved-parity- (BIS)
— signal formats: 8 bits/5 MS
— formatting: bit-interleaved-
QUESTION
Describe the four-layer G.707 signal format.
ANSWER
Show 2
A
The G.707 signal format is the same as the SDH signal format, except for the following:
— Two timeslots are used for SDH: 48,192,768
— The number of bits per second is 1.25 Gb/s instead of 2.5 Gb/s
— The number of bytes per second is 1.25 Gb/s instead of 2.5 Gb/s
— The bit order is bit-and-byte instead of bit-and-parity-and-byte
QUESTION
When is the SDH connection between the
optical interfaces established?
ANSWER
Show 2
A
SDH connection is established on the second of two successive zero A
bit timeslot (A-Z0). The connection is reset on the next A-Z1
bit timeslot.
QUESTION
What is the difference between an optical interface
designated as SDH-OC-48 and an optical interface designated
as SDH-OC-192?
ANSWER
Show 2
A
A 1.25 Gb/s interface designated as OC-48 is equivalent to a 10.5 Gb/s
SDH-OC-48 interface. This interface is equivalent to
a 1.
642-321 — Cisco Optical SDH Exam (SDH) Practice Test Questions Crack [Latest]
Syntax Description
SNC=2.6 billion connections a day
KHz=Cisco Optical SDH has 128 bit capacity per 40 Gbps wavelength channel
SCAS=Subcarrier assigned area subcarrier
PXSC=Protection subcarrier
SFO=Subcarrier overhead
SDH=Subcarrier channel
FEC=Forward error correction
RDS=RDS Self-Synchronizing
2-way AM
1-way AM
4-way AS
2-way AS
1-way AS
4-way AS
PoP=Point-to-Point
Cisco 642-321 Exam Practice Test for 642-321
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System Requirements For 642-321 — Cisco Optical SDH Exam (SDH) Practice Test Questions:
Minimum:
OS: Microsoft® Windows® 7 SP1
CPU: Intel® Core™ i3-7100U (2.50 GHz) or AMD equivalent (2.40 GHz) or greater
Memory: 4 GB RAM
RAM: 256 MB
Graphics: DirectX 9.0c compliant video card, 1024 x 768 resolution or greater
DirectX: Version 9.0c
Storage: 1 GB available space
Output: USB 2.0 port
Multi-touch screen: Touch Screen
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