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JN0-649 Exam - Question 49


Click the Exhibit button.

Referring to the exhibit, which two statements are correct? (Choose two.)

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Correct Answer: BC

For VLAN 10, since all ports are in the designated state and the forwarding role, it indicates that the switch

Discussion

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chicharito14Options: BD
Feb 24, 2023

No doubt for B. C is absolutely wrong, the ROOT port on an non-root bridge receives BPDU from root bridge, so for vlan 20 the port receives BPDU is ge-0/0/8.0 not ge-0/0/7.0

tester2478
Jul 14, 2023

all ports are receiving BPDU from a root/FWD bridge so switch elect one as root port and the others as ALT/BKL so io go for BC

TUWATCHEROptions: BC
Mar 6, 2023

B - as all ports are designated C- BPDU also received on blocked ports

dragosskyOptions: BC
Jan 4, 2023

DS-1 port status - DESG / FWD - VLAN 10 - ROOT Bridge DS-1 port status BLK/ALT - VLAN 20

sangkiOptions: BC
Jan 4, 2023

i think b and c

hbstyleboyOptions: BC
Mar 16, 2023

If a non-root bridge receives a BPDU (Bridge Protocol Data Unit) from the root bridge on one of its ports, it will use the information contained in the BPDU to determine the root bridge and calculate the best path to reach it. The non-root bridge will compare the received BPDU's root bridge ID with its own bridge ID. If the root bridge ID in the received BPDU is lower than the bridge ID of the non-root bridge, the non-root bridge will understand that there is a better path to reach the root bridge through the port where the BPDU was received. This port will become the root port. Once the root port is selected, the non-root bridge will forward all traffic destined for the root bridge through this port. The non-root bridge will also send its own BPDU's out all other ports to help maintain the spanning tree topology and ensure that loops do not occur in the network. In summary, when a non-root bridge receives a BPDU from the root bridge, it uses the information in the BPDU to select its root port and forward traffic towards the root bridge.

Mahdi
Jul 18, 2023

should be BC

harrypogiOptions: BC
Sep 23, 2023

bc is correct

sirup12Options: BD
Feb 13, 2024

100% it is B, D. No doubt for B. BPDUs from the root bridge for VLAN 20 are received on port Ge-0/0/8 - root port. Root port is the closest port to the root bridge -> the best BPDUs are received on root port. D - 4096 is default priority + VLAN Number => 4106 for Vlan 10 and 4116 for Vlan 20

h4lv4r3
Feb 25, 2024

Default VSTP priority is 32k so D is wrong