Answer C Explanation QUESTION NO 16 After the recent upgrade of the switching

Answer c explanation question no 16 after the recent

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Answer: C Explanation: QUESTION NO: 16 After the recent upgrade of the switching infrastructure, the network engineer notices that the port roles that were once "blocking" are now defined as "alternate" and "backup." What is the reason for this change? A. The new switches are using RSTP instead of legacy IEEE 802.1D STP. Cisco 300-115 Exam "Pass Any Exam. Any Time." - 9
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B. IEEE 802.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. C. The administrator has defined the switch as the root in the STP domain. D. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. Answer: A Explanation: QUESTION NO: 17 An administrator recently configured all ports for rapid transition using PortFast. After testing, it has been determined that several ports are not transitioning as they should. What is the reason for this? A. RSTP has been enabled per interface and not globally. B. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. C. STP is unable to achieve rapid transition for trunk links. D. The switch does not have the processing power to ensure rapid transition for all ports. Answer: C Explanation: QUESTION NO: 18 Which technique automatically limits VLAN traffic to only the switches that require it? A. access lists B. DTP in nonegotiate C. VTP pruning D. PBR Answer: C Explanation: QUESTION NO: 19 What effect does the mac address-table aging-time 180 command have on the MAC address- table? Cisco 300-115 Exam "Pass Any Exam. Any Time." - 10
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A. This is how long a dynamic MAC address will remain in the CAM table. B. The MAC address-table will be flushed every 3 minutes. C. The default timeout period will be 360 seconds. D. ARP requests will be processed less frequently by the switch. E. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. Answer: A Explanation: QUESTION NO: 20 While working in the core network building, a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. As designed, the link was placed into a non-forwarding state due to a fault with UDLD. After the damaged cable was replaced, the link did not recover. What solution allows the network switch to automatically recover from such an issue? A. macros B. errdisable autorecovery C. IP Event Dampening D. command aliases E. Bidirectional Forwarding Detection Answer: B Explanation: QUESTION NO: 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. The SDM template is causing the CPU of the switch to spike during peak working hours. What is the root cause of this issue? A. The VLAN receives additional frames from neighboring switches.
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