Spanning Tree

What is the default bridge priority value assigned to Juniper EX Series switches when RSTP is enabled?

An administrator needs to configure MSTP on a group of EX Series switches. Which three parameters must be identical across all switches in the same MST region?

You need to ensure that a core switch retains its position as the root bridge even if a new switch with a manually lowered bridge priority is added to the network. Which feature should you configure on the core switch's ports facing the downstream switches?

While examining an RSTP topology, you notice that a designated port has suddenly stopped receiving BPDUs from its upstream neighbor, causing the port to transition into a discarding state to prevent potential loops. Which feature is actively providing this protection?

What is the role of the Root Port in an RSTP topology?

An enterprise network runs MSTP. Instance 0 is always reserved for which specific purpose?

What is the primary function of the RSTP port role known as the 'Backup' port?

When configuring MSTP, what purpose does the regional configuration digest serve?

An operator configures RSTP across multiple EX Series switches. A rogue switch running legacy STP is connected to an RSTP switch. How does the RSTP switch handle interaction with the legacy STP switch?

You need to modify the bridge priority of an EX Series switch running RSTP to ensure it becomes the root bridge. Which configuration command correctly sets the bridge priority to 4096?

When a topology change occurs in an RSTP network, how are MAC address forwarding table entries affected across the switches?

An administrator configures link aggregation (ae0) using LACP between two EX Series switches running RSTP. How does RSTP treat the aggregated interface ae0?

An organization runs MSTP with multiple instances. A packet belonging to a VLAN that is not explicitly mapped to any MST instance is processed in which manner?

What is the primary purpose of the Hello timer in RSTP?

An EX Series switch running MSTP receives a BPDU from an upstream switch in a different MST region. How does the receiving switch identify the boundary between the two regions?

You want to disable spanning tree protocol entirely on a specific access interface (ge-0/0/10.0) of an EX Series switch while keeping RSTP active globally. Which configuration command achieves this?

An enterprise network uses MSTP. What is the function of the Internal Root in an MST region?

What action does the 'set protocols rstp max-age <seconds>' command perform on a Juniper switch?

When configuring MSTP, how is the regional maximum hop count enforced across switches within the same MST region?

You are configuring an EX Series switch and want to set the forward delay timer to 15 seconds. Which command is used?

An administrator configures root protection on a designated port. If that port subsequently receives a superior BPDU from another switch, what exact state does the port transition into?

Which TWO port roles are defined in Rapid Spanning Tree Protocol (RSTP) but did not exist in legacy 802.1D STP? (Choose two.)

Which TWO commands can be used to view spanning tree information on a Juniper EX Series switch? (Choose two.)

What is the primary benefit of enabling edge port configuration on switch access ports connected to end devices?

Which THREE parameters are included when calculating the MST region configuration digest? (Choose three.)

Which TWO features help protect an RSTP topology from unauthorized switches or misconfigurations on access ports? (Choose two.)

Which THREE states are defined in Rapid Spanning Tree Protocol (RSTP)? (Choose three.)

Which TWO statements are correct regarding the operation of MSTP instance 0 (CIST)? (Choose two.)

Which TWO mechanisms are utilized by RSTP to achieve rapid convergence compared to legacy 802.1D STP? (Choose two.)

Which THREE parameters must match across all switches for them to successfully form a single MST region? (Choose three.)

Which TWO commands are valid Junos configuration hierarchy paths for setting up RSTP? (Choose two.)

Which THREE statements describe the function of the Designated Port in RSTP? (Choose three.)

You notice that an access switch running RSTP is continually dropping user traffic because a connected end-user device is sending inferior BPDUs that trigger topology changes. Which Juniper feature should you configure on the access ports to protect against this behavior?

You are configuring Multiple Spanning Tree Protocol (MSTP) across multiple EX Series switches in your enterprise network. Which three parameters must be identical across all switches to ensure they belong to the same MST region?

Which TWO parameters are included when a Junos switch calculates the MST configuration digest? (Choose two.)

You have an EX Series switch running RSTP. You notice that a port connected to a server is flapping between forwarding and discarding states. The server NIC is configured for teaming but is not sending BPDUs. You have configured the port as an edge port using 'set protocols rstp interface ge-0/0/5 edge'. However, the port still flaps. What is the most likely cause?

You are troubleshooting an RSTP network. You notice that a port on an EX Series switch is flapping between Discarding and Forwarding states. You suspect a BPDU inconsistency. Which command would you use to check for BPDU inconsistencies on the switch?

You have an EX Series switch running RSTP. You want to configure a port connected to a printer to immediately transition to forwarding without going through the learning state. Which configuration statement should you use?