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Testinside642321V4.73认证考试题库考题分享.doc

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Exam : Cisco 642-321 Title : Cisco Optical SDH Exam Version : V4.73 English: www.TestI GB: www.T TestInside,help you pass any IT exam! 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 only on Working path. D. 1+1 sends signals on Working path ONLY, while 1:1 sends signals on both Working and Protect paths. Answer: C 4. You are provisioning an E-1 circuit on an ONS 15454 MS-SPRing configuration and XC-VXL-10G card. Each VC-12 connection must also terminate via the VC-3 matrix. How many VC-3 ports remain after this circuit is created, assuming no other circuits? A. 92 B. 93 C. 94 D. 95 E. 96 Answer: C 5. Click the Exhibit button. In the DCN connection shown in the exhibit, all non-GNE nodes are located on different subnets from the GNE. There are no static routes or external OSPF on any elements. ??CTC workstation and GNE have Router as its default gateway. Can the CTC workstation see the entire SDH network? A. Yes, but only if the CTCs network address is a static route in the GNE. B. Yes, because the GNE will only serve as a proxy-ARP for elements on the same subnet. C. Yes, but only if the routers address is entered as a static route in the non-GNE elements. D. Yes, because the GNE will serve as a proxy-ARP for all elements, regardless of their subnets. Answer: A 6. What protocol enables Ethernet over SONET/SDH encapsulation interoperability between the G-series and ML-series Ethernet cards?