ICND1 LAN Switching Technologies 5

Question 1

Which command enables PortFast on an individual switch interface?

Accepted Answer

spanning-tree portfast

Answer

The interface-level command 'spanning-tree portfast' enables PortFast, skipping the listening and learning STP states.

Question 2

What is the maximum number of VLANs supported in the standard VLAN range (not extended)?

Accepted Answer

1005

Answer

Standard VLANs range from 1 to 1005 on Cisco switches, with some reserved for specific uses.

Question 3

A switch port is in err-disabled state. Which command restores it without manually shutting it down and bringing it back up?

Accepted Answer

errdisable recovery cause bpduguard

Answer

'errdisable recovery cause bpduguard' enables automatic recovery for ports shut down by BPDU Guard.

Question 4

On a Cisco switch, which inter-VLAN routing method uses a single physical trunk link to a router with subinterfaces?

Accepted Answer

Router-on-a-stick

Answer

Router-on-a-stick uses one physical link with 802.1Q subinterfaces on the router, one per VLAN, for inter-VLAN routing.

Question 5

Which spanning tree port state listens for BPDUs but neither learns MAC addresses nor forwards frames?

Accepted Answer

Listening

Answer

The Listening state processes BPDUs to determine topology but does not populate the MAC table or forward data.

(ICND1) Interconnecting Cisco Networking Devices Part 1 Practice Test