Which two of these are used by bridges and switches to prevent loops in a layer 2 network? (Choose two.)

Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard? (Choose two.)

On which types of network will OSPF elect a backup designated router?

A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?

What can be determined from the router output shown in the graphic?

A network administrator is configuring the routers in the graphic for OSPF. The OSPF process has been started and the networks have been configured for Area 0 as shown in the diagram. The network administrator has several options for configuring RouterB to ensure that it will be preferred as the designated router (DR) for the 172.16.1.0 /24 LAN segment. What configuration tasks could be used to establish this preference? (Choose three)

What is the default administrative distance of OSPF?

Why do large OSPF networks use a hierarchical design? (Choose three)

Router 1 was just successfully rebooted. Identify the current OSPF router ID for Router 1.

Which type of EIGRP route entry describes a feasible successor?