A network engineer is troubleshooting a connectivity issue between two switches. A packet capture shows a frame with an EtherType of 0x8100 and a VLAN tag with VID=100. However, the receiving switch is not forwarding the frame to the expected port. What is the most likely cause?

The receiving switch does not have VLAN 100 configured.

The TPID is incorrect for the receiving switch.

The PCP bits are set to a low priority, causing the switch to drop the frame.

The frame is untagged and should be assigned to the native VLAN.

A network administrator is examining a frame captured on a trunk port. The 802.1Q tag shows a VID of 0x001 and a DEI bit set to 1. What does the DEI bit indicate?

The frame is tagged with VLAN 1.

The frame is an untagged frame.

The frame is eligible to be dropped under congestion.

When a switch sends a frame belonging to the native VLAN out a trunk port, what does it do?

It sends the frame without a VLAN tag

It adds a tag with the native VLAN ID

It drops the frame because native VLAN traffic is not allowed on trunks

It encapsulates the frame in a new Ethernet header

Where is the IEEE 802.1Q VLAN tag inserted in an Ethernet frame?

Between the source MAC address and the EtherType/Length field

Between the preamble and the destination MAC address

After the payload and before the Frame Check Sequence

After the EtherType/Length field and before the payload

Juniper NetworksCertified Associate, Data Center

Domain 2Objective 3

VLAN Tagging JN0-281 Practice Questions (Page 4)

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 16–20

16expert · hard
A network engineer is troubleshooting a connectivity issue between two switches. A packet capture shows a frame with an EtherType of 0x8100 and a VLAN tag with VID=100. However, the receiving switch is not forwarding the frame to the expected port. What is the most likely cause?
Select an answer first
17application · medium
A network administrator is examining a frame captured on a trunk port. The 802.1Q tag shows a VID of 0x001 and a DEI bit set to 1. What does the DEI bit indicate?
Select an answer first
18foundation · easy
When a switch sends a frame belonging to the native VLAN out a trunk port, what does it do?
Select an answer first
19foundation · easy
Where is the IEEE 802.1Q VLAN tag inserted in an Ethernet frame?
Select an answer first
20foundation · easy
Which standard defines the VLAN tag format used in Ethernet networks?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

No more pagesBack to JN0-281

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Juniper Networks. “JN0-281” is a trademark of its owner, used for identification only.