NE NE Switching 2

Question 1

What is an inter-VLAN routing method that uses a single trunk link between a router and a switch?

Accepted Answer

Router-on-a-stick

Answer

Layer 3 switching

Answer

Proxy ARP routing

Answer

Static routing

Question 2

Which Cisco proprietary protocol dynamically manages VLAN configuration across multiple switches?

Accepted Answer

VTP (VLAN Trunking Protocol)

Answer

STP

Answer

LACP

Answer

CDP

Question 3

What is the native VLAN in 802.1Q trunking?

Accepted Answer

The VLAN whose frames are sent untagged across the trunk

Answer

The VLAN that carries management traffic only

Answer

The highest-priority VLAN on the trunk

Answer

The VLAN assigned to all unused ports

Question 4

What does RSTP (802.1w) provide compared to traditional STP (802.1D)?

Accepted Answer

Faster convergence by introducing new port roles and states

Answer

Per-VLAN spanning tree instances

Answer

Load balancing across redundant links

Answer

VLAN pruning across trunk links

Question 5

What is the function of PortFast in Cisco STP implementations?

Accepted Answer

It allows access ports connected to end devices to skip STP listening and learning states

Answer

It increases STP convergence speed on trunk ports

Answer

It elects the root bridge faster

Answer

It enables BPDU filtering on all ports

Question 6

Which feature prevents a PortFast-enabled port from causing a topology change if a switch is mistakenly connected to it?

Accepted Answer

BPDU Guard

Answer

Root Guard

Answer

Loop Guard

Answer

UplinkFast