200-301 Which Command Should the Administrator Use Practice Questions

A switch port is configured with port security using these commands:

switchport port-security
switchport port-security maximum 2
switchport port-security violation restrict
switchport port-security mac-address sticky

A user unplugs a company laptop and connects a different unauthorized device. The interface stays up/up, but the new device has no connectivity.

Which statement best explains what happened?

A router is configured as follows:

interface g0/1
 ip address 172.16.1.1 255.255.255.0
 ip helper-address 10.20.20.10

Hosts on 172.16.1.0/24 are not receiving addresses from the DHCP server at 10.20.20.10. The server is reachable by ping from the router.

What is the purpose of the ip helper-address command in this scenario?

A router interface is configured for OSPF, but neighbors do not form. The engineer checks the interface and sees Hello 10 and Dead 40. The neighbor on the same segment uses Hello 30 and Dead 120.

What is the most likely cause of the OSPF adjacency failure?

R1 has the following static route configured:

What does this route accomplish?