A trunk link between two switches is up, but the `show interfaces trunk` output on Switch A shows the native VLAN as 1, while Switch B shows it as 10. What is the immediate impact of this misconfiguration?

The trunk will automatically renegotiate the native VLAN to match.

All traffic on the trunk will be dropped.

Untagged traffic on VLAN 1 from Switch A will be received as VLAN 10 on Switch B.

What happens to a port that has BPDU guard enabled when it receives a BPDU?

The port continues to forward traffic but ignores the BPDU

The port becomes the root port and the switch becomes the root bridge

The port is placed in a root-inconsistent state and stops forwarding

The port is put into an errdisable state and must be manually re-enabled or automatically recovered

What is a common issue when using PAgP to form an EtherChannel?

PAgP is not supported on Cisco switches

PAgP can only bundle up to 4 physical links

PAgP modes must be compatible; for example, desirable and auto will form a channel

PAgP requires the use of 802.1Q trunking

What is a common error when configuring a static EtherChannel?

Using the channel-group command with the mode active option

Configuring different allowed VLAN lists on the physical interfaces

Configuring the same speed and duplex on all physical interfaces

Assigning the physical interfaces to the same VLAN

An administrator enabled BPDU guard on all access ports. A user accidentally connected a small unmanaged switch to an access port to share the connection with a coworker. The port went into errdisable state. What is the most efficient way to restore the port without manual intervention?

Configure the port as a trunk port.

Disable BPDU guard on the port.

Manually re-enable the port with `shutdown` and `no shutdown`.

Configure `errdisable recovery cause bpduguard` and set a recovery interval.

CiscoCertified Network Professional Enterprise

Domain 3Objective 1

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

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 6–10

6application · medium
A trunk link between two switches is up, but the `show interfaces trunk` output on Switch A shows the native VLAN as 1, while Switch B shows it as 10. What is the immediate impact of this misconfiguration?
Select an answer first
7foundation · easy
What happens to a port that has BPDU guard enabled when it receives a BPDU?
Select an answer first
8foundation · easy
What is a common issue when using PAgP to form an EtherChannel?
Select an answer first
9foundation · easy
What is a common error when configuring a static EtherChannel?
Select an answer first
10expert · hard
An administrator enabled BPDU guard on all access ports. A user accidentally connected a small unmanaged switch to an access port to share the connection with a coworker. The port went into errdisable state. What is the most efficient way to restore the port without manual intervention?
Select an answer first

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