CCNA Switch Questions

What criteria is used first during the root port selection process?

• local port ID

• lowest path cost to the root bridge

• lowest neighbor's bridge ID

• lowest neighbor's port ID

What does a switch use to build its MAC address table?

• VTP

• DTP

• egress traffic

• ingress traffic

The network engineer wants VLAN 67 traffic to be untagged between Sw1 and Sw2 while all other VLANs remain tagged. Which command accomplishes this task?

• switchport access vlan 67

• switchport trunk allowed vlan 67

• switchport private-vlan association host 67

• switchport trunk native vlan 67

A port security violation has occurred on a switch port due to the maximum MAC address count being exceeded. Which command must be configured to increment the security-violation count and forward an SNMP trap?

• switchport port-security violation access

• switchport port-security violation protect

• switchport port-security violation restrict

• switchport port-security violation shutdown

Which state does the switch port move to when PortFast is enabled?

• forwarding

• listening

• blocking

• learning

Consider the following configuration: (config) int g1/11
(config-if)# switchport mode access

(config-if)# spanning-tree portfast

(config-if)# spanning-tree bpduguard enable

What is the result if G1/11 receives an STP BPDU?

• The port transitions to STP blocking

• The port transitions to the root port

• The port immediately transitions to STP forwarding

• The port goes into the error-disabled state

Refer to the image. PC1 is trying to ping PC3 for the first time and sends out an ARP to S1. Which action is taken by S1?

• It forwards it out G0/4 only

• It is flooded out every port except G0/2

• It drops the frame

• It forwards it out interface G0/1 only

Consider the following:

Switch 1 VLAN 110 32778 0018.184e.3c00

Switch 2 VLAN 110 24586 00a1.e3ff.a680

Switch 3 VLAN 110 28682 0022.55cf.cc00

Switch 4 VLAN 110 64000 0e38.7363.657f

Which switch becomes the root of the spanning tree for VLAN 110?

• Switch 1

• Switch 2

• Switch 3

• Switch 4

Which mode must be used to configure EtherChannel between two switches without using a negotiation protocol?

• on

• auto

• active

• desirable

A frame that enters a switch fails the frame check sequence. Which two interface counters are incremented? (Choose two.)

• runts

• giants

• frame

• CRC

• input errors