A network administrator configures a static trunk between two switches. The trunk is up, but devices in VLAN 10 cannot communicate across the link. Which configuration mismatch is the most likely cause?

The trunk encapsulation is set to ISL on one switch

The trunk mode is set to dynamic auto on one switch

The native VLAN is different on the two switches

The allowed VLAN list on one switch does not include VLAN 10

A network has multiple VLANs and the engineer wants to use MST to reduce the number of spanning-tree instances. They create an MST region with two instances: instance 1 for VLANs 10-20 and instance 2 for VLANs 30-40. What must be identical on all switches in the region?

The port roles and states for each instance.

The VLAN-to-instance mapping, the region name, and the revision number.

The MAC address of the switches.

The bridge priority for each instance.

What is the primary purpose of 802.1Q trunking on a Cisco switch?

To provide a secure encrypted tunnel for management traffic between switches

To aggregate multiple physical links into a single logical link for increased bandwidth

To segment a LAN into separate broadcast domains without the use of VLANs

To carry traffic for multiple VLANs over a single link by adding VLAN identification tags to frames

Which statement about the native VLAN on an 802.1Q trunk is true?

The native VLAN must be the same on both ends of the trunk to avoid misconfiguration

The native VLAN is used only for control traffic such as BPDUs and DTP frames

Frames on the native VLAN are tagged with VLAN ID 1 by default

The native VLAN can be changed to any VLAN except VLAN 1

An administrator is configuring a switch port that connects to a single workstation. They want to ensure that if a rogue switch is connected, the port is automatically disabled to prevent a spanning-tree loop. Which feature should be enabled?

`spanning-tree bpdufilter enable`

`spanning-tree bpduguard enable`

CiscoCertified Network Professional Enterprise

Domain 3Objective 1

3.1 Layer 2 350-401 Practice Questions (Page 1)

Part of the 3.0 Infrastructure domain, which accounts for 30% of the 350-401 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~15–24 in this domain), expect 5–8 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

10concepts

30%of the exam

Questions 1–5

1foundation · easy
A network administrator configures a static trunk between two switches. The trunk is up, but devices in VLAN 10 cannot communicate across the link. Which configuration mismatch is the most likely cause?
Select an answer first
2application · medium
A network has multiple VLANs and the engineer wants to use MST to reduce the number of spanning-tree instances. They create an MST region with two instances: instance 1 for VLANs 10-20 and instance 2 for VLANs 30-40. What must be identical on all switches in the region?
Select an answer first
3foundation · easy
What is the primary purpose of 802.1Q trunking on a Cisco switch?
Select an answer first
4foundation · easy
Which statement about the native VLAN on an 802.1Q trunk is true?
Select an answer first
5application · medium
An administrator is configuring a switch port that connects to a single workstation. They want to ensure that if a rogue switch is connected, the port is automatically disabled to prevent a spanning-tree loop. Which feature should be enabled?
Select an answer first

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