JNCIS ENT Layer 2 Switching Operations Quiz

1. In RSTP, what is the primary advantage over traditional STP?

Faster convergence time (milliseconds vs. seconds)

Lower CPU usage

Support for more VLANs

Automatic IP address assignment

2. What is the purpose of the STP bridge priority value in root bridge election?

To determine link speed

To influence which switch becomes the root bridge (lower priority wins)

To control MAC address learning rate

To manage VLAN membership

3. Which of the following best describes port security on a switch?

Limiting MAC addresses allowed on a port to prevent unauthorized access

Encrypting all traffic on a port

Blocking all incoming traffic

Assigning static IP addresses to ports

Submit

5. What is the maximum number of VLANs supported on most Juniper EX-series switches?

64 VLANs

256 VLANs

4,094 VLANs

8,192 VLANs

Submit

7. In Juniper EX switches, what does the term 'native VLAN' refer to?

The VLAN that carries untagged traffic on a trunk port

The first VLAN created on a switch

A VLAN used only for management

The VLAN with the highest ID number

8. Which feature prevents unknown unicast flooding by learning MAC addresses dynamically?

Spanning Tree Protocol

MAC address learning

Port security

VLAN tagging

Submit

10. What is the default VLAN on Juniper EX switches called?

VLAN 0

VLAN 1 (default)

Management VLAN

Native VLAN

11. What is the primary function of the MAC address table in a Layer 2 switch?

To forward frames based on destination MAC addresses

To encrypt network traffic

To assign IP addresses to devices

To manage routing protocols

Submit

13. Which command displays the MAC address table on a Juniper EX switch?

Show mac-address-table

Display bridge table

Show ethernet-switching table

List mac addresses

14. What is the purpose of BPDU (Bridge Protocol Data Unit) in spanning tree?

To encrypt switch-to-switch communication

To exchange topology information and elect root bridge

To assign IP addresses dynamically

To manage MAC address aging

Submit

16. What does the root bridge election process in STP use as the primary tie-breaker?

Port speed

Bridge ID (Priority + MAC address)

Number of connected devices

VLAN configuration

17. Which of the following best describes a trunk port in Layer 2 switching?

A port that carries single VLAN traffic only

A port that carries multiple VLANs with 802.1Q tagging

A port used for console management

A port that blocks all spanning tree traffic

18. What is the default state of a port on a Juniper EX switch when it first powers on?

Access port in VLAN 1

Trunk port with all VLANs

Disabled until configured

Part of a LAG (Link Aggregation Group)

19. In Juniper EX switches, what command creates a VLAN with ID 100 and name 'Production'?

Set vlans Production vlan-id 100

Create vlan Production 100

Configure vlan 100 Production

Add vlan Production id 100

20. Which spanning tree protocol is the IEEE standard for preventing bridge loops?

RSTP (Rapid Spanning Tree Protocol)

STP (Spanning Tree Protocol)

MSTP (Multiple Spanning Tree Protocol)

PVST+ (Per VLAN Spanning Tree Plus)

JNCIS ENT Layer 2 Switching Operations Quiz

1. In RSTP, what is the primary advantage over traditional STP?

2.

What first name or nickname would you like us to use?

2. What is the purpose of the STP bridge priority value in root bridge election?

3. Which of the following best describes port security on a switch?

4. In Layer 2 switching, ______ is the process by which a switch learns the MAC addresses of connected devices.

5. What is the maximum number of VLANs supported on most Juniper EX-series switches?

6. The ______ timer in spanning tree determines how long a switch waits before aging out a MAC address entry.

7. In Juniper EX switches, what does the term 'native VLAN' refer to?

8. Which feature prevents unknown unicast flooding by learning MAC addresses dynamically?

9. The ______ port role in spanning tree forwards frames and accepts BPDUs on a designated port.

10. What is the default VLAN on Juniper EX switches called?

11. What is the primary function of the MAC address table in a Layer 2 switch?

12. A VLAN is used to ______ a broadcast domain on a switch.

13. Which command displays the MAC address table on a Juniper EX switch?

14. What is the purpose of BPDU (Bridge Protocol Data Unit) in spanning tree?

15. In Juniper EX switches, the ______ mode allows a port to dynamically negotiate VLAN membership.

16. What does the root bridge election process in STP use as the primary tie-breaker?

17. Which of the following best describes a trunk port in Layer 2 switching?

18. What is the default state of a port on a Juniper EX switch when it first powers on?

19. In Juniper EX switches, what command creates a VLAN with ID 100 and name 'Production'?

20. Which spanning tree protocol is the IEEE standard for preventing bridge loops?