A network administrator is troubleshooting a connectivity issue between two switches. A packet capture shows an Ethernet frame with the bytes 0x8100 followed by a 2-byte field containing 0x000A. What does the 0x8100 value indicate?

The frame uses the 802.1Q tagging standard.

The frame is tagged with VLAN 10.

The frame has a priority of 10.

The frame is an untagged frame.

Two Juniper switches are connected via a trunk link. The native VLAN is configured as VLAN 10 on Switch A and VLAN 20 on Switch B. What is a potential consequence of this misconfiguration?

All tagged traffic will be dropped because the native VLANs do not match.

The switches will form a loop and cause a broadcast storm.

The trunk link will automatically negotiate a common native VLAN.

Untagged traffic from VLAN 10 on Switch A will be incorrectly received as VLAN 20 on Switch B, causing potential security and connectivity issues.

What is the primary purpose of VLAN tagging on a trunk link?

To compress frames to reduce bandwidth usage on trunk links

To prioritize frames based on their source MAC address

To identify which VLAN a frame belongs to as it traverses a shared link

To encrypt VLAN traffic to prevent unauthorized access

What is the purpose of the Priority Code Point (PCP) field in the 802.1Q tag?

To mark frames that should be dropped under congestion

To specify the frame's priority for quality of service

To identify the protocol type of the payload

Juniper NetworksCertified Associate, Data Center

Domain 2Objective 3

VLAN Tagging JN0-281 Practice Questions (Page 3)

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 11–15

11application · medium
A network administrator is troubleshooting a connectivity issue between two switches. A packet capture shows an Ethernet frame with the bytes 0x8100 followed by a 2-byte field containing 0x000A. What does the 0x8100 value indicate?
Select an answer first
12application · medium
Two Juniper switches are connected via a trunk link. The native VLAN is configured as VLAN 10 on Switch A and VLAN 20 on Switch B. What is a potential consequence of this misconfiguration?
Select an answer first
13foundation · easy
What is the primary purpose of VLAN tagging on a trunk link?
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14foundation · easy
Which field in the 802.1Q tag identifies the VLAN to which a frame belongs?
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15foundation · easy
What is the purpose of the Priority Code Point (PCP) field in the 802.1Q tag?
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