What distinguishes an HP switch with a CLOS fabric from an HP switch with a crossbar fabric?

A company needs a simple guest access solution. On each HP Provision access layer switch, the
network administrator (Web-Auth) to an external Web server. Which guidelines must the
administrator follow while setting up the Web server?

An HP Provision switch port is implementing MAC Authentication (MAC-Auth) to a RADIUS server.
A device connects to the port, and the switch submits a RADIUS Access-Request to the server.
What correctly describes how the switch determines the username and password for the request?

Refer to the exhibit.

The five routers shown in the exhibit are successfully implementing OSPF on the interface shown
in the exhibit. The exhibit also shows settings for OSPF areas and interface costs.
A network administrator enters these commands on Router 4 and Router 5:

How can the administrator ensures that Router 2 learns the route to 172.16.0.0/16 with next hop
10.0.0.6?

Refer to the exhibit.
Exhibit 1

Exhibit 2

Exhibit 1 shows a simplified network topology. All infrastructure devices shown in the exhibit are
successfully implementing (OSPF) on the interfaces. The exhibit also shows settings for OSPF
areas. Exhibit 2 shows additional settings on IRF. The master within IRF 1 fails. Connectivity is
disrupted for about one minute.
What can the network administrator do to prevent this issue occurring again?

A company plans to use Intelligent Management Center CMC) Network Traffic Analyzer (NTA) to
monitor network utilization. How do HP switches with the solution?

A company has configured two switches as an HP Intelligent Resilient Framework (IRF) virtual
device. The IRF port on each switch is bound to multiple physical links. How does the switch
select the link for transmitting packets on that IRF port?