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Slide 1: PassGuide 642-845 Cisco 642-845 ONT - Optimizing Converged Cisco Networks Q&A Demo www.PassGuide.com (C) Copyright 2006-2009 CertBible Tech LTD,All Rights Reserved. PassGuide.com - Make You Succeed To Pass IT Exams
Slide 2: PassGuide 642-845 Important Note Please Read Carefully Study Tips This product will provide you questions and answers carefully compiled and written by our experts. Try to understand the concepts behind the questions instead of cramming the questions. Go through the entire document at least twice so that you make sure that you are not missing anything. Latest Version We are constantly reviewing our products. New material is added and old material is revised. Free updates are available for 120 days after the purchase. You should check your member zone at PassGuide an update 3-4 days before the scheduled exam date. Feedback If you spot a possible improvement then please let us know. We always interested in improving product quality. Feedback should be send to feedback@passguide.com. You should include the following: Exam number, version, page number, question number, and your login ID. Our experts will answer your mail promptly. Be Prepared. Be Confident. Get Certified. ------------------------------------------------------------------------------------------------------------------------Sales and Support Manager Sales Team: sales@passguide.com Support Team: support@passguide.com --------------------------------------------------------------------------------------------------------------------- Copyright Each pdf file contains a unique serial number associated with your particular name and contact information for security purposes. So if we find out that a particular pdf file is being distributed by you, CertBible reserves the right to take legal action against you according to the International Copyright Laws. PassGuide.com - Make You Succeed To Pass IT Exams
Slide 3: PassGuide 642-845 Question：1 Which one of the following statements correctly describes an FXO interface? A. analog trunks that connect a gateway to plain old telephone service (POTS) device such as analog phones, fax machines, and legacy voice-mail systems B. analog trunks that provide the Survivable Remote Site Telephony (SRST) feature C. analog trunks that provide VoIP gateway functionality D. analog trunks that connect a gateway to a central office (CO) or private branch exchange (PBX) Answer: D Question：2 Cisco AutoQoS is innovative technology that minimizes the complexity, time, and operating cost of Quality of Service (QoS) deployment. Which two steps are executed in the deployment of Cisco AutoQoS for Enterprise?(Choose two.) A. The customer uses SNMP statistics to create the policy. B. QoS policy templates are generated and installed on the interface. C. The auto-generated policy is manually optimized before implementation. D. Auto-discovery is used to determine what traffic is on the interface. Answer: BD Question：3 Quality of Service (QoS) refers to the capability of a network to provide better service to selected network traffic over various technologies .Which two options are true about the application of QoS in a converged network?(Choose two.) A. End-to-end network delay is not a factor as long as the delay is consistent. B. Some packet loss can be corrected by codec algorithms. C. End-to-end network delay times that exceed 50 ms for real-time traffic are considered unacceptable. D. End-to-end network delay times that exceed 250 ms for real-time traffic are considered unacceptable. Answer: BD Question：4 Network topology exhibit: You are a network technician at TestInside.com, examine the exhibit carefully. You need to finalize the configuration of router TIS-R in this scenario. In particular you should decide which interface types can be used for connecting router TIS-R to the phone and fax respectively. (Choose two.) A. Connect the analog phone to an FXS port. B. Connect the fax to an FXS port. C. Connect the fax to an FXO port. D. Connect the analog phone to an FXO port. Answer: AB Question：5 Look at the following options, which one is not a benefit of VoIP compared to traditional circuit-switched telephony? A. Access to new communication devices B. Consolidated network expenses C. Improved employee productivity D. Higher voice quality Answer: D Question：6 On the basis of the following traffic descriptions, which one is used for marking? A. FIFO Layer 2 descriptor labels (L2DL) B. WRED (Weighted RED) orange or green labels C. MPLS experimental bits D. Header compression tags PassGuide.com - Make You Succeed To Pass IT Exams
Slide 4: PassGuide 642-845 Answer: B Question：7 You are a network technician at TestInside.com, do you know what are two of the three predefined classes for the Cisco SDM wizard? (Choose two.) A. best effort B. middle class C. high priority D. business-critical Answer: AD Question：8 You work as a network technician, study the following options carefully.A GRE tunnel is configured between a local and a remote site. Where should the service policy be applied to classify packets based on the pretunnel header? A. Apply the service policy on the physical interface but do not use the qos pre-classify command. B. In global configuration mode, apply the service policy and use the qos pre-classify command. C. In global configuration mode, apply the service policy but do not use the qos pre-classify command. D. Apply the service policy on the tunnel interface but do not use the qos pre-classify command. Answer: D Question：9 Which option is not considered one of the main methods to tackle the bandwidth availability problem? A. Use compression techniques. B. Increase (upgrade) the link bandwidth. C. Forward large packets first. D. Classify and mark traffic and deploy proper queuing mechanisms. Answer: C Question：10 Refer to the capabilities of a voice gateway router ,which statement is true ? A. Voice gateways need a gatekeeper to interconnect the VoIP networks with the PSTN network. B. Voice gateways equipped with a DSP module can take the role of the call agent during WAN failure. C. Voice gateways with Cisco Unified CallManager Express (CME) can permanently act as a call agent for IP phones. D. Voice gateways with analog interfaces need a gatekeeper to convert analog signals into digital format before voice is encapsulated into IP packets. Answer: C PassGuide.com - Make You Succeed To Pass IT Exams