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An advantage of NFS (Network File System) as compared to Fibre Channel is that NFS provides the dynamic allocation of storage capacity. This means that NFS allows the storage space to be allocated and released on demand, depending on the needs of the applications and users. NFS also enables the sharing of files and directories across different servers and clients, simplifying the management and access of data. Fibre Channel, on the other hand, is a protocol that provides high-speed and low-latency communication between storage devices and servers, but it requires fixed and pre-allocated storage capacity, which can lead to underutilization or overprovisioning of resources. Fibre Channel also requires dedicated hardware and cabling, which can increase the cost and complexity of the storage network.

References: For more information on NFS and Fibre Channel, please refer to the following resources:

• DCCOR: Fibre Channel & Storage Networking
• iSCSI vs. Fibre Channel

 Before a maintenance policy can be committed, it is essential to set the policy to apply the change on the next reboot (Option C). This ensures that the changes are applied in a controlled manner, avoiding any immediate disruptions. References := Cisco Data Center Core Technologies

https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/CLI-User-Guides/Admin-

Management/3-1/b_Cisco_UCS_Manager_CLI_Administration_Mgmt_Guide_3_1/

b_Cisco_UCS_Manager_CLI_Administration_Mgmt_Guide_3_1_chapter_01100.html

The ACI REST API is a programmatic interface that uses REST architecture to interact with the management information tree (MIT) of the Cisco Application Policy Infrastructure Controller (APIC). The API requires authentication for users to access and manipulate the objects in the MIT. The authentication is based on username and password credentials, and the API provides several methods to manage the session authentication. Two of these methods are:

• POST to aaaLogin. This method logs in a user and opens a session. The message body contains an aaa:User object with the name and password attributes, and the response contains a session token and cookie. The session token and cookie are required for subsequent requests to the API, and they have a limited validity period that can be refreshed.
• DELETE to aaaLogout. This method logs out a user and closes a session. The message body contains an aaa:User object with the name attribute, and the response contains a status code indicating the success or failure of the operation. The session token and cookie are invalidated and cannot be used for further requests to the API.

References := The information is based on the Cisco APIC REST API Configuration Guide, which explains the usage and features of the ACI REST API, including the authentication methods89.

 The correct configuration to generate a syslog message when CPU utilization is higher than 60% is option A. This configuration uses the Event Manager Applet feature of Cisco IOS to monitor the CPU utilization via SNMP. When the CPU utilization exceeds 60%, the specified action is triggered, which in this case is to send a syslog message with a priority of notifications and the message “cpu high”. The event snmp oid command specifies the OID to be monitored, and the entry-op gt 60 part of the command sets the condition for triggering the action when the value is greater than 60. The poll-interval 5 specifies that the SNMP OID will be polled every 5 seconds.

https://www.cisco.com/c/en/us/support/docs/ip/internet-protocol-ip/200931-EEM-Subsystem-in-Order-to-

Monitor-CPU-Tr.pdf

https://blog.ipspace.net/2008/06/generate-snmp-trap-on-high-cpu-load.html