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Exam JN0-351 topic 1 question 43 discussion

Actual exam question from Juniper's JN0-351
Question #: 43
Topic #: 1
[All JN0-351 Questions]

Which two mechanisms are part of building and maintaining a Layer 2 bridge table? (Choose two.)

  • A. blocking
  • B. flooding
  • C. learning
  • D. listening
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Suggested Answer: BC 🗳️

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koloooo
2 weeks, 2 days ago
Selected Answer: BC
1. MAC Learning: When a switch receives a frame, it learns the source MAC address and the port it arrived on, adding this information to the table. 2. Forwarding: When a frame arrives with a destination MAC address found in the table, the switch forwards it directly to the corresponding port. 3. Flooding: If the destination MAC address is not in the table, the switch floods the frame to all ports in the VLAN (except the incoming port). 4. Aging: Dynamic MAC address entries are typically aged out after a certain period (defaulting to 300 seconds) if they are not used.
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koloooo
3 weeks, 6 days ago
Selected Answer: BC
https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topic-map/bridging-and-vlans.html
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sandaruwann654
7 months, 1 week ago
Selected Answer: BC
B,C are correct
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julin_10
1 year ago
Selected Answer: BC
Transparent bridging uses five mechanisms to create and maintain Ethernet switching tables on the switch: Learning Forwarding Flooding Filtering Aging
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