ccna zoom technologies ppt

ccna zoom technologies ppt.2. the switch with the smallest Co switch ID is elected as the root switch. a and b are incorrect because the election is based on the switch ID, which contains the switch's priority and MAC address. d is incorrect because it is the switch ID that is the smallest and not the largest.3. the switch port that Do selects for forwarding segment traffic is called the designated port. a is incorrect because the root port is the port that the switch uses to travel to the root switch. b (alternate port) is used in RSTP and is the secondary root port. c (alternate port) is used in RSTP and is the secondary designated port.4.A andD. In the listening state, the port processes and forwards BPDUs; the port stays in this state for 15 s. B refers to a port in the learning state; C is the amount of time the port remains in the blocking state.5. There are three port states in AoRSTP: discard, learn, and forward. Since there are only three states, B, C, and D are incorrect.6. co alternative ports have suboptimal paths to the root switch. a has the best path to the root switch; b has the best path from the network segment to the root switch; and d has the suboptimal path from the network segment to the root switch.7. ao On the Catalyst switch, use the command spanning-treemoderapid-pvst to enable PVST+ with RSTP support. state is not a valid parameter, so B is incorrect; C is not a valid command; and D has an invalid value for the mode parameter.8. co ports must be configured identically to establish a channel. a is incorrect because a channel can contain up to 8 ports. b is incorrect because each switch can have up to 6 channels. d is fast converging STP,dynamically established channels are PAgP and LACPo9. bo If there is a Layer 2 loop, the switch will have very high CPU and port utilization. a is incorrect because the mere presence of a large number of broadcasts and multicasts does not imply the presence of a Layer 2 loop; the presence of a Layer 2 loop is indicated only if duplicate broadcast/multicast frames are seen; c indicates the presence of a physical layer fault, such as a cable failure; the presence of a Layer 2 loop will be continuously updated using correct and incorrect information D is incorrect.10.B. When using the Protocol Analyzer to troubleshoot a Layer 2 loop, look for recurring frames.A displays traffic statistics for the interface, but does not indicate whether the traffic is broadcast and is constantly in transit through the loop; C is not a valid command; and D is used to troubleshoot a Layer 3, not a Layer 2, fault.