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Exam
: Cisco 642-321
Title
: Cisco Optical SDH Exam
Version : Demo
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1. Which timing mode is most appropriate for an ONS 15454 that has lost its BITS-1 and optical
references?
A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
Answer: C
2. With R4.0, how many total DCC-R tunnel connections can each ONS 15454 support using the TCC+
card?
A. 10
B. 32
C. 64
D. 84
E. 96
Answer: B
3. What is the difference between 1+1 and 1:1 protection switching?
A. 1+1 is based on APS, while 1:1 is based on IPS.
B. 1:1 is used in SNCP switching, while 1+1 is used in MS-SPRing switching.
C. 1+1 sends signals on Working and Protect paths, while 1:1 sends signals on