Cisco Implementing Cisco Switched Networks Set 4

Which first-hop redundancy solution listed would supply clients with MAC address 0000.0C07.AC0A for group 10 in response to an ARP request for a default gateway?

You want to allow Router R1 to immediately become the active router if its priority is highest than the active router fails. What command would you use if you wanted to configure this?

Routers R1 and R2 are configured for HSRP as shown below:
You have configured the routers R1 & R2 with HSRP. While debugging router R2 you notice very frequent HSRP group state transitions. What is the most likely cause of this?

In the hardware address 0000.0c07.ac0a, what does 07.ac represent?

HSRP has been configured between two Company devices. What kind of message does an HSRP configured router send out every 3 seconds?

The following command was issued on a router that is being configured as the active HSRP router.
standby ip 10.2.1.1
Which statement is true about this command?

What can be determined about the HSRP relationship from the displayed debug output?

Which command will ensure that R2 will be the primary router for traffic using the gateway address of 172.16.15.20?

Which command will need to be added to External_A to ensure that it will take over if serial 0/0 on External_B fails?

Online Incorporated is an internet game provide. The game service network had recently added an additional switch block with multiple VLANs configured. Unfortunately, system administrators neglected to document the spanning-tree topology during configuration. For baseline purpose, you will be required to identify the spanning-tree topology for the switch block. Using the output of "show spanning-tree" command on switch SW-C and the provided physical topology, answer the following questions:
The output of "show spanning-tree" command on SW-C:
Which spanning Tree Protocol has been implemented on SW-B?