A switch receives a frame on port ge-0/0/4 with a source MAC address of 00:AA:BB:CC:DD:EE. The switch already has an entry for this MAC address associated with port ge-0/0/7. What action does the switch take regarding the MAC address table?

It deletes the existing entry and creates a new one for port ge-0/0/4

It adds a second entry for the same MAC address on port ge-0/0/4

It keeps the existing entry for port ge-0/0/7 unchanged

It updates the existing entry to associate the MAC address with port ge-0/0/4

A network administrator is troubleshooting a security issue. A switch has learned a MAC address on two different ports within a short time. The administrator suspects a rogue device is spoofing the MAC address. What is the most likely behavior of the switch in this situation?

The switch updates the MAC table to the most recent port.

The switch shuts down both ports.

The switch floods all frames to that MAC address.

The switch drops all frames from that MAC address.

Juniper NetworksCertified Specialist, Enterprise Routing and Switching (JNCIS-ENT)

Domain 1Objective 2

Frame Processing JN0-352 Practice Questions (Page 5)

Part of the Layer 2 Switching and VLANs domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–1 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

7concepts

Questions 21–22

21foundation · easy
A switch receives a frame on port ge-0/0/4 with a source MAC address of 00:AA:BB:CC:DD:EE. The switch already has an entry for this MAC address associated with port ge-0/0/7. What action does the switch take regarding the MAC address table?
Select an answer first
22expert · medium
A network administrator is troubleshooting a security issue. A switch has learned a MAC address on two different ports within a short time. The administrator suspects a rogue device is spoofing the MAC address. What is the most likely behavior of the switch in this situation?
Select an answer first

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Frame Processing JN0-352 Practice Questions (Page 5)

Questions 21–22

A switch receives a frame on port ge-0/0/4 with a source MAC address of 00:AA:BB:CC:DD:EE. The switch already has an entry for this MAC address associated with port ge-0/0/7. What action does the switch take regarding the MAC address table?

A network administrator is troubleshooting a security issue. A switch has learned a MAC address on two different ports within a short time. The administrator suspects a rogue device is spoofing the MAC address. What is the most likely behavior of the switch in this situation?

Keep studying — Layer 2 Switching and VLANs