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?
172.104.0.0/14
172.104.0.0/15
172.104.0.0/13
172.104.0.0/12
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?
err-disabled
restrict
protect
shutdown
log
Question 3
31% answer correctly
Which of the following about STP operations is true?
One root bridge exists per collision domain.
One root port exists per broadcast domain.
One designated port is defined per segment.
One root port is established per root bridge.
Non-designated ports are set in the forwarding state.