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Valentina is employed under the network management team at Iris Global Services, which is a software management firm. Following a recent hacking attempt at its office, the network administrator wants her to cross-check whether security precautions have been enabled on the STP interfaces so that the information transmitted by the BPDUs can be protected. On inspection, she discovers that the security precautions have not been configured. Analyze what Valentina should do in order to prevent a rogue switch or computer connected to one of these ports from hijacking the network's STP paths. a. Use the shutdown command to disable unused ports
b. Use a root guard on the switches
c. Use a BPDU filter to disable STPs
d. Use a BPDU guard to block BPDUs

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The way that Valentina should do in order to prevent a rogue switch or computer connected to one of these ports from hijacking the network's STP paths is option D:  Use a BPDU guard to block BPDUs

What is BPDU guard used for?

Switching devices cannot unintentionally connect to ports that support PortFast thanks to BPDU Guard. The BPDU guard makes sure that any attempts to connect an L2 device to the network are refused. 27

A switch that has been connected to the network without the owner or administrator of the network's permission is referred to as a rogue switch. The security of a network is threatened by rogue switches. The distinction is that whereas BPDUfilter only "filters" a BPDU, BPDUguard will place the interface that it receives the BPDU on in err-disable mode.

Therefore, One of the improvements to the Spanning Tree Protocol (STP) is the Bridge Protocol Data Unit (BPDU) Guard function. Reliability, manageability, and security of the switch network are all improved by this functionality. Any Ethernet LAN can have a loop-free topology thanks to STP.

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