When a switch receives an untagged frame on a trunk port, how does it determine the frame's VLAN?

It uses the source MAC address to look up the VLAN

It drops the frame because untagged frames are not allowed on trunk ports

It broadcasts the frame to all VLANs

It assigns the frame to the native VLAN configured on that port

A network administrator is configuring QoS on a trunk port. The requirement is to mark all traffic from a specific server with a priority of 5. The server sends untagged frames. What must be configured to achieve this?

Configure the access port to tag frames with PCP 5.

Configure the native VLAN to have a priority of 5.

Configure the trunk port to add a tag with PCP 5 to untagged frames.

Configure the server to send tagged frames with PCP 5.

How does VLAN tagging help maintain VLAN integrity across multiple switches?

By encrypting frames so only authorized switches can read them

By using IP routing to forward frames between switches

By ensuring that frames from different VLANs are not mixed on a trunk link

By assigning each VLAN a unique MAC address

A data center has multiple Juniper switches interconnected. The network team wants to ensure that VLAN 100 can span across all switches while keeping broadcast traffic isolated from other VLANs. What is the most efficient way to achieve this?

Configure all inter-switch links as access ports in VLAN 100.

Create VLAN 100 only on the core switch and use access ports on all other switches.

Use a single flat network without VLANs and rely on IP subnets for isolation.

Create VLAN 100 on each switch and configure trunk links between switches with VLAN 100 allowed.

Juniper NetworksCertified Associate, Data Center

Domain 2Objective 3

VLAN Tagging JN0-281 Practice Questions (Page 1)

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

20questions here

4free pages

7concepts

Questions 1–5

1foundation · easy
When a switch receives an untagged frame on a trunk port, how does it determine the frame's VLAN?
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2expert · hard
A network administrator is configuring QoS on a trunk port. The requirement is to mark all traffic from a specific server with a priority of 5. The server sends untagged frames. What must be configured to achieve this?
Select an answer first
3foundation · easy
Which type of port typically sends and receives only untagged frames?
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4foundation · easy
How does VLAN tagging help maintain VLAN integrity across multiple switches?
Select an answer first
5application · medium
A data center has multiple Juniper switches interconnected. The network team wants to ensure that VLAN 100 can span across all switches while keeping broadcast traffic isolated from other VLANs. What is the most efficient way to achieve this?
Select an answer first

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