CCNA Service Provider Practice Test Results

Question 1
35% answer correctly
Given these four Class B networks: 172.104.0.0, 172.105.0.0, 172.106.0.0, 172.107.0.0, what is the supernet (CIDR) address that summarizes these four Class B networks?
172.104.0.0/12
172.104.0.0/14
172.104.0.0/13
172.104.0.0/15
172.104.0.0/11
Question 2
49% answer correctly
On Cisco IOS Switches, which port security violation mode results in frames from non-allowed MAC address being dropped, log message created, and SNMP trap sent?
protect
restrict
log
err-disabled
shutdown
Question 3
31% answer correctly
Which of the following about STP operations is true?
One designated port is defined per segment.
Non-designated ports are set in the forwarding state.
One root port exists per broadcast domain.
One root bridge exists per collision domain.
One root port is established per root bridge.