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
172.104.0.0/13
172.104.0.0/15
172.104.0.0/11
172.104.0.0/14
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?
shutdown
protect
restrict
log
err-disabled
Question 3
39% answer correctly
Which statement about 10/40/100 GigabitEthernet interface configuration on Cisco IOS XR is true?
The interface has no flow control configuration.
Use the negotiation auto command in interface configuration mode to enable link auto-negotiation to ensure that devices that share a link segment are automatically configured with the highest performance.
The configuration supports only full-duplex operation.
The range for MTU values is 64 bytes to 1518 bytes on the interface.