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PopQuiz Cisco Exam #640-861: DESGN Exam (MeasureUp, set 1) Check your network design aptitude for Cisco's CCDA certification with these 10 sample questions. courtesy of MeasureUp 1. Answers A and B are correct. DDR (Dial on Demand Routing) is by its nature an event driven technology that relies on certain conditions to initiate connectivity, otherwise known as "interesting traffic". Low volume, periodic, on-demand traffic is ideal for a DDR solution. The term "interesting traffic" means that when traffic meeting a pre-determined "type" or "load" is seen by the router, it knows that an ISDN call is warranted to pass that traffic to its destination. Any other form of network traffic not deemed "interesting" will not prompt the router to initiate a call. Since DDR (via ISDN) has the potential to result in costly ISDN calls, you want to carefully control the events that result in the ISDN routing invoking a connection attempt. The other options requiring constant connectivity and/or high bandwidth are incorrect because ISDN constant connectivity is too expensive (especially since DSL is so widely available and much cheaper), and the bandwidth is too low to support high bandwidth.
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2. Answer A is correct. A bridge filters a frame after referring to the bridging table and discovering that the source MAC and the destination MAC are on the same segment. Bridges do not look at Layer 3 addresses; they are concerned only with Layer 2 Addresses (MAC addresses), which eliminates any choices that reference an IP Address. IP Addresses are defined at Layer 3. If the location of a MAC address is not known, the frame is forwarded on all ports just like a switch. A switch after all is just a multiport bridge.
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3. Answer B is correct. The enterprise edge functional area filters traffic from modules at the edge and routes the packets into the enterprise campus. The enterprise campus functional area contains all the elements for the network for independent operation within a campus network. The service provider edge functional area enables communication with other networks that use different WAN technologies. The Internet connectivity model is a module of the enterprise edge functional area, and it provides Internet access to the users in the enterprise.
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4. Answer C is correct. The service provider edge functional area enables communication with other networks that use different WAN technologies. The enterprise campus functional area contains all the elements for the network for independent operation within a campus network. The enterprise edge functional area filters traffic from modules at the edge and routes the packets into the enterprise campus. The Internet connectivity model is a module of the enterprise edge functional area, and it provides Internet access to the users in the enterprise.
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5. Answer A is correct. Leased lines provide a point-to-point connection that is always available for transmission. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. A packet-switched network uses a permanent virtual circuit to deliver packets to various locations. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology.
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6. Answer B is correct. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. Leased lines provide a point-to-point connection that is always available for transmission. A packet-switched network uses a permanent virtual circuit to deliver packets to various locations. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology.
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7. Answer C is correct. A packet-switched network uses a permanent virtual circuit (PVC) to deliver packets to various locations. Leased lines provide a point-to-point connection that is always available for transmission. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology.
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8. Answer D is correct. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology. Leased lines provide a point-to-point connection that is always available for transmission. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. A packet-switched network uses a permanent virtual circuit to deliver packets to various locations.
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9. Answer E is correct. Digital Subscriber Line (DSL) technology uses traditional copper telephone wire while still providing high bandwidth connectivity. MPLS combines Layer 2 switching and Layer 3 switching. MPLS assigns labels that are used to determine how the data is processed. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology. Leased lines provide a point-to-point connection that is always available for transmission. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. A packet-switched network uses a permanent virtual circuit to deliver packets to various locations.
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10. Answer F is correct. MPLS provides for high scalability while still providing for flexible WAN solutions. MPLS combines Layer 2 switching and Layer 3 switching. It assigns labels that are used to determine how the data is processed. Digital Subscriber Line (DSL) technology uses traditional copper telephone wire while still providing high bandwidth connectivity. Asynchronous Transfer Mode (ATM) performs switching using cells and transfers data using digital signal technology. Leased lines provide a point-to-point connection that is always available for transmission. Circuit-switched networks dedicate a physical path to a single location between two network endpoints for a period of time. A packet-switched network uses a permanent virtual circuit to deliver packets to various locations.
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