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Related Flashcards
Cards In This Set
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What command will show you the forward/filter table?
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Show mac address-table
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If a destination MAC address is not in the forward/filter table, what will the switch dowith the frame?
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Flood the frame out all ports except the port it was received on
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What are the three switch functions at layer 2?
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Address learning, forward/filter decisions, and loop avoidance
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If a frame is received on a switch port and the source MAC address is not in the forward/filter table, what will the switch do?
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It will add the source MAC address in the forward/filter table and associate it with theport the frame was received on.
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What is used at layer 2 to prevent switching loops?
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Spanning Tree Protocol (STP)
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If a switch receives a frame and it is a broadcast, what will the switch do to the frame?
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It will add the source MAC address in the forward/filter table and associate it with theport the frame was received on.
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When is STP considered to be converged?
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When all ports are in either the blocking or forwarding mode
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Switches break up _________ domains.
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Collision
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What is used to prevent switching loops in a network with redundant switched paths?
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Spanning Tree Protocol (STP)
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Which Cisco 802.1d extension stops BPDU from being transmitted out a port?
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PortFast
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Which of the following is a layer 2 protocol used to maintain a loop-free network?A. VTPB. STPC. RIPD. CDP
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B. The Spanning Tree Protocol is used to stop switching loops in a switched network withredundant paths.
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What command will display the forward/filter table?A. show mac filterB. show runC. show mac address-tableD. show mac filter-table
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C. The command show mac address-table displays the forward/filter table on the switch.
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What is the result of segmenting a network with a bridge (switch)? (Choose two options.)A. It increases the number of collision domains.B. It decreases the number of collision domains.C. It increases the number of broadcast domains.D. It decreases the number of broadcast domains.E. It makes smaller collision domains.F. It makes larger collision domains.
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A, E. Bridges break up collision domains, which would increase the number of collisiondomains in a network and also make smaller collision domains.
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Why would a network administrator configure port security on a switch?A. To prevent unauthorized Telnet access to a switch portB. To limit the number of layer 2 broadcasts on a particular switch portC. To prevent unauthorized hosts from accessing the LAND. To block unauthorized access to the switch management interfaces over commonTCP ports
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C. To stop unauthorized users from accessing the LAN, you can configure port security onyour switch.
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What are two effects on network performance of configuring a switch to store an entire framebefore forwarding it to the destination? (Choose two.)A. Increase in switch operating speedB. Increased latencyC. Filtering of all frame errorsD. Filtering of collision fragments onlyE. Decreased latency
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B, C. The store-and-forward LAN switch method will store the entire frame received on an interfaceand run a CRC to verify that no errors have occurred. This will increase latency on yourswitched network.
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