What is the main benefit of link aggregation (e.g., LACP) on a Juniper switch?

Encrypts traffic between switches

Combines multiple physical links into one logical link to increase bandwidth and provide redundancy

Segments the network into multiple broadcast domains

What is the purpose of the 802.1Q tag in an Ethernet frame?

To provide encryption for the frame

To prioritize the frame for QoS

To identify which VLAN the frame belongs to

A network has two switches connected by two links. The administrator wants to use both links for redundancy but also wants to avoid a broadcast storm. What is the best approach?

Use one link for VLAN 10 and the other for VLAN 20, and disable STP.

Use both links as access ports in the same VLAN.

Enable STP on both switches and let it block one link.

Disable STP and rely on the switch's MAC learning to prevent loops.

An administrator connects two switches with a link and wants to carry traffic for VLANs 10, 20, and 30 between them. The ports on each switch are configured as access ports in VLAN 10. What must be done to allow VLANs 20 and 30 to traverse the link?

Use a different physical link for each VLAN.

Change the ports to trunk mode and allow VLANs 10, 20, and 30 on the trunk.

Configure the ports as trunk ports but only allow VLAN 10.

Keep the ports as access ports but add VLANs 20 and 30 to the allowed list.

Juniper NetworksCertified Associate, Data Center

Domain 2Objective 1

Ethernet Switching and Bridging Concepts JN0-281 Practice Questions (Page 2)

Part of the Layer 2 Switching and VLANs domain, which makes up ~21% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~7–13 in this domain), expect 1–2 from this objective — we provide 29 practice questions to prepare you well beyond it. (estimate)

29questions here

6free pages

8concepts

Questions 6–10

6foundation · easy
What is the main benefit of link aggregation (e.g., LACP) on a Juniper switch?
Select an answer first
7foundation · easy
Which field in an Ethernet frame is used by a switch to determine the destination for forwarding the frame?
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8foundation · easy
What is the purpose of the 802.1Q tag in an Ethernet frame?
Select an answer first
9expert · hard
A network has two switches connected by two links. The administrator wants to use both links for redundancy but also wants to avoid a broadcast storm. What is the best approach?
Select an answer first
10application · medium
An administrator connects two switches with a link and wants to carry traffic for VLANs 10, 20, and 30 between them. The ports on each switch are configured as access ports in VLAN 10. What must be done to allow VLANs 20 and 30 to traverse the link?
Select an answer first

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