What is the primary function of a bridge in a Layer 2 network?

To route packets between different IP subnets

To filter traffic based on IP addresses and port numbers

To forward frames based on destination MAC addresses

To translate between different media types, such as Ethernet and fiber

A network engineer is designing a redundant Layer 2 network with multiple switches and links. They are considering whether to enable RSTP. What is the most critical consequence of NOT enabling a spanning tree protocol in this design?

Broadcast frames will loop indefinitely, consuming bandwidth and CPU, and MAC address tables will become unstable.

The switches will not be able to learn MAC addresses, so all frames will be flooded.

The switches will automatically disable redundant links to prevent loops.

The network will experience routing loops at Layer 3, causing packets to be dropped.

What is the role of spanning tree protocols in a bridged network?

To prevent loops by blocking redundant paths

To provide redundancy by allowing multiple active paths

To route frames between different VLANs

To encrypt frames for secure transmission

What does a bridge do with a frame whose destination MAC address is on the same port from which the frame was received?

It sends the frame to the CPU for processing

It forwards the frame out the same port

It forwards the frame out all other ports

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

Domain 1Objective 1

Bridging Components JN0-352 Practice Questions (Page 1)

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 15 practice questions to prepare you well beyond it. (estimate)

15questions here

3free pages

5concepts

Questions 1–5

1foundation · easy
Which address does a bridge use to make forwarding decisions?
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2foundation · easy
What is the primary function of a bridge in a Layer 2 network?
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3expert · medium
A network engineer is designing a redundant Layer 2 network with multiple switches and links. They are considering whether to enable RSTP. What is the most critical consequence of NOT enabling a spanning tree protocol in this design?
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4foundation · easy
What is the role of spanning tree protocols in a bridged network?
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5foundation · easy
What does a bridge do with a frame whose destination MAC address is on the same port from which the frame was received?
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