ISPs use which protocol to establish peering sessions in an Internet exchange point environment?

You are enabling OSPF on a router and notice that all the Fast Ethernet and the Gigabit Ethernet
interfaces have the same OSPF cost of 1. Which single configuration change can you make in
router ospf configuration mode so that the Fast Ethernet interfaces have a higher OSPF cost than
the Gigabit Ethernet interfaces?

On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0
interface that has an IPv4 IP address of 192.168.1.1/24?

Which three statements about OSPFv2 or OSPFv3 authentication are true? (Choose three.)

Which statement is true about enabling IS-IS routing and using the net command to configure the
NSAP address?

You have just enabled IS-IS on the lab testing network. You notice that IS-IS is not using the
optimal path selection based on the interface bandwidth. Currently, the IS-IS routing process
seems to be selecting the best path based on the hop count.
What configuration change can you make to cause IS-IS to select the optimal path based on the
interface bandwidth?

You have installed a new router and configured OSPF on it. However, this new router is not able
to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four conditions
could cause this problem? (Choose four.)

Refer to the Cisco IOS XR configuration exhibit.

Which statement about the configuration is true?

Which statement about the benefits of MPLS PHP is true?

Refer to the exhibit.

Which three statements about MPLS LDP operations are true?