A Juniper switch is configured with VLAN 100 and an interface ge-0/0/1 is assigned to it. The administrator notices that the interface is operationally down. The 'show vlans' command shows VLAN 100 is up. What is the most likely cause of the interface being down?

The VLAN is not configured with a VLAN ID.

The interface is configured as a trunk port.

The physical cable is disconnected or the connected device is powered off.

The VLAN is not assigned to any other interfaces.

A network engineer is troubleshooting a connectivity issue between two hosts in the same VLAN on a Juniper switch. The 'show vlans' command shows the VLAN is up and both interfaces are members. The 'show interfaces terse' command shows both interfaces are up. The 'show ethernet-switching table' shows the MAC addresses of both hosts are learned on the correct interfaces. However, the hosts still cannot ping each other. What is the most likely cause of this issue?

The VLAN is not configured with an IP address.

The switch has a MAC address table issue that is preventing the forwarding of frames.

The switch has a spanning-tree loop that is causing the interfaces to be in a blocking state.

The hosts are configured with IP addresses in different subnets.

An administrator has configured VLAN 400 on a Juniper switch and assigned interface ge-0/0/1 to it. The administrator wants to verify that the interface is correctly assigned to VLAN 400 and is operationally up. Which command provides this information?

show ethernet-switching table vlan-id 400

Juniper NetworksCertified Associate, Data Center

Domain 2Objective 6

VLAN Configuration, Monitoring, Troubleshooting 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 9 practice questions to prepare you well beyond it. (estimate)

9questions here

2free pages

3concepts

Questions 1–5

1application · medium
A Juniper switch is configured with VLAN 100 and an interface ge-0/0/1 is assigned to it. The administrator notices that the interface is operationally down. The 'show vlans' command shows VLAN 100 is up. What is the most likely cause of the interface being down?
Select an answer first
2expert · hard
A network engineer is troubleshooting a connectivity issue between two hosts in the same VLAN on a Juniper switch. The 'show vlans' command shows the VLAN is up and both interfaces are members. The 'show interfaces terse' command shows both interfaces are up. The 'show ethernet-switching table' shows the MAC addresses of both hosts are learned on the correct interfaces. However, the hosts still cannot ping each other. What is the most likely cause of this issue?
Select an answer first
3foundation · easy
Two hosts on the same VLAN cannot communicate. The interfaces are configured as access ports with the same VLAN ID. Which command would you use to verify that the VLAN is operationally up and has the correct interfaces assigned?
Select an answer first
4foundation · easy
Which Junos operational command displays the VLAN ID, name, and associated interfaces for all VLANs on a switch?
Select an answer first
5application · medium
An administrator has configured VLAN 400 on a Juniper switch and assigned interface ge-0/0/1 to it. The administrator wants to verify that the interface is correctly assigned to VLAN 400 and is operationally up. Which command provides this information?
Select an answer first

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VLAN Configuration, Monitoring, Troubleshooting JN0-281 Practice Questions (Page 1)

Questions 1–5

A Juniper switch is configured with VLAN 100 and an interface ge-0/0/1 is assigned to it. The administrator notices that the interface is operationally down. The 'show vlans' command shows VLAN 100 is up. What is the most likely cause of the interface being down?

Two hosts on the same VLAN cannot communicate. The interfaces are configured as access ports with the same VLAN ID. Which command would you use to verify that the VLAN is operationally up and has the correct interfaces assigned?

Which Junos operational command displays the VLAN ID, name, and associated interfaces for all VLANs on a switch?

An administrator has configured VLAN 400 on a Juniper switch and assigned interface ge-0/0/1 to it. The administrator wants to verify that the interface is correctly assigned to VLAN 400 and is operationally up. Which command provides this information?

Keep studying — Layer 2 Switching and VLANs