Cisco 640-911 practice test

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2. The safer , easier way to help you pass any IT exams.  1.Which two networking devices operate at Layer 1 of the OSI model? (Choose two.) A. Repeater B. Bridge C. Switch D. Router E. Hub Answer: A,E Explanation: It defines the electrical and physical specifications of the data connection. It defines the relationship between a device and a physical transmission medium (e.g. a copper or fiber optical cable). This includes the layout of pins, voltages, line impedance, cable specifications, signal timing, hubs, repeaters, network adapters, host bus adapters (HBA used in storage area networks) and more." http://en.wikipedia.org/wiki/OSI_model 2.Which two networking devices forward data based on destination MAC address? (Choose two.) A. Repeater B. Bridge C. Switch D. Router E. Hub Answer: B,C Explanation: http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9670/white_paper_c11465436.html 3.Which two network topologies are the most popular in switching? (Choose two.) A. Bus B. Token passing bus C. Star D. Extended star E. Ring Answer: C,D Explanation: http://en.wikipedia.org/wiki/Network_topology 4.Which device would you select to partition a network into VLANs? A. repeater B. bridge C. switch D. router E. hub Answer: C 5.At which layer of the OSI model does TCP operate? A. 1 www.passcert.com 2 / 3

3. The safer , easier way to help you pass any IT exams.  B. 2 C. 3 D. 4 E. 5 Answer: D Explanation: http://en.wikipedia.org/wiki/OSI_model www.passcert.com 3 / 3

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