A network administrator notices that an access port connected to a user's desk is receiving BPDUs, which is unexpected. The administrator suspects a rogue switch has been connected. The requirement is to prevent the rogue switch from participating in spanning tree while keeping the port operational for the user's PC. Which action should the administrator take?

Set the interface to 'no spanning-tree' to ignore all BPDUs and keep the port forwarding.

Configure the interface as a trunk port and apply loop protection to prevent BPDU loops.

Enable root protection on the interface to prevent the rogue switch from becoming the root bridge.

Enable BPDU protection on the interface and configure the interface to be error-disabled if a BPDU is received.

A network administrator has enabled BPDU protection on an access port. Later, a user accidentally connects a small switch to that port, and the port goes into an error-disabled state. The administrator has removed the rogue switch and wants to bring the port back to service without restarting the switch. Which action should the administrator take?

Disable and re-enable the interface using the 'disable' and 'enable' commands.

Reboot the switch to reset all interfaces.

Remove and re-add the BPDU protection configuration on the interface.

Clear the MAC address table on the switch.

Which configuration error is a common cause of port security violations on an access port?

The MAC limit is set too low for the number of devices connected

The interface speed is set incorrectly

The VLAN is not assigned to the interface

The interface is configured as a trunk port

Juniper NetworksCertified Specialist, Enterprise Routing and Switching (JNCIS-ENT)

Domain 3Objective 6

Configure, Monitor, or Troubleshoot Layer 2 Protection and Port Security JN0-352 Practice Questions (Page 1)

Part of the Layer 2 Security domain, which makes up ~13% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–8 in this domain), expect 1–1 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

14concepts

14 Concepts in This Objective

Layer 2 protection mechanisms
Port security basics
Configuring port security
Monitoring port security
Troubleshooting port security
Configuring BPDU protection
Monitoring BPDU protection
Troubleshooting BPDU protection
Configuring root protection
Monitoring root protection
Troubleshooting root protection
Configuring loop protection
Monitoring loop protection
Troubleshooting loop protection

Questions 1–5

1foundation · easy
Which Layer 2 protection feature is designed to prevent a port from being elected as the root port by ignoring superior BPDUs received on that interface?
Select an answer first
2foundation · easy
What is the port state called when loop protection detects that BPDUs have stopped on a port?
Select an answer first
3application · medium
A network administrator notices that an access port connected to a user's desk is receiving BPDUs, which is unexpected. The administrator suspects a rogue switch has been connected. The requirement is to prevent the rogue switch from participating in spanning tree while keeping the port operational for the user's PC. Which action should the administrator take?
Select an answer first
4application · medium
A network administrator has enabled BPDU protection on an access port. Later, a user accidentally connects a small switch to that port, and the port goes into an error-disabled state. The administrator has removed the rogue switch and wants to bring the port back to service without restarting the switch. Which action should the administrator take?
Select an answer first
5foundation · easy
Which configuration error is a common cause of port security violations on an access port?
Select an answer first

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Configure, Monitor, or Troubleshoot Layer 2 Protection and Port Security JN0-352 Practice Questions (Page 1)

Questions 1–5

Which Layer 2 protection feature is designed to prevent a port from being elected as the root port by ignoring superior BPDUs received on that interface?

What is the port state called when loop protection detects that BPDUs have stopped on a port?

Which configuration error is a common cause of port security violations on an access port?

Keep studying — Layer 2 Security