Which three actions are valid methods to clear all entries from the Ethernet switching table on an EX Series switch? (Choose three.)

An EX Series switch receives an Ethernet frame with a destination MAC address that is not in the bridging table.
How does the Junos OS handle the received frame?

Which mechanism keeps a switch from forwarding Layer 2 traffic from one broadcast domain to another?

You are viewing the Ethernet switching table and notice that a previous entry is no longer listed. What is a valid reason for an entry to be removed from the table?

You execute the operational-mode command show ospf neighbor and notice that one neighbor relationship remains in the exStart state.

What causes this behavior?

You run the operational-mode command show ospf neighbor and notice that an expected OSPF neighbor on a broadcast link is not detected.
Which three issues cause this behavior? (Choose three.)

You want several different subnets within your enterprise network to be reachable from outside the enterprise network. Your edge router must share a single route advertisement about these subnets with external devices. If one of the subnets is unavailable, your edge router should drop any traffic destined to that subnet.

Which type of route, configured on the edge device with default behavior, accomplishes these objectives?

Refer to the Exhibit.

In the output shown in the exhibit, which protocol does the route display?

You configured an aggregate route of 192.168.8.0/21 and committed the updated configuration. Using an operational show command, you notice that the newly configured route is not present in the output.
What would explain this behavior?

Which configuration command would you use to add an IPv6 static route to your Junos device?