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Implementing and Operating Cisco Data Center Core Technologies (DCCOR) Questions 186–190 (page: 39)

Updated On: 10-Feb-2026

The EPLD update of the supervisor module has been scheduled for several Cisco MDS 9000 Series Switches. What will be the impact of the update?

  1. All traffic is stopped for the duration of the EPLD update and the switch is rebooted after the upgrade is completed.
  2. The redundant supervisor takes over while the EPLD update is in progress and the switch is rebooted after the upgrade is completed.
  3. All control plane traffic is stopped for the duration of the EPLD update and the switch remains operational for the duration of the upgrade.
  4. The redundant supervisor takes over while the EPLD update is in progress and there is no service disruption.

Answer(s): A

Explanation:

An EPLD update of the supervisor module of Fabric Switches (Cisco MDS 9100, Cisco MDS 9200, and Cisco MDS 9300 Series switches) is disruptive since there is no redundant supervisor to take over while the update is in progress. All traffic through the system is stopped while updating and the switch is power cycled after the upgrade has completed. The update may take up to 30 minutes to complete.


Reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/6_2/release/notes/epld/epld_rn.html



A network engineer configures a converged network adapter (CNA) and must associate a virtual Fibre Channel 7 interface to VSAN 7. The CNA is connected to the interface Eth1/7, and VLAN 700 is mapped to the VSAN. Which configuration must be applied to create the virtual Fibre Channel interface and associate it with the Ethernet physical interface?

  1. switch(config)# interface vfc 7 switch(config-if)# bind interface ethernet 1/7
  2. switch(config)# vlan 700 switch(config-vlan)# fcoe vsan 7
  3. switch(config)# vsan database switch(config-vsan)# vsan 7 interface vfc 7
  4. switch(config)# interface ethernet 1/7 switch(config-if)# vfc 7 attach vlan 1,700

Answer(s): A


Reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/fcoe/421_n1_1/b_Cisco_n5k_fcoe_config_gd_re_421_n1_1/
Cisco_n5k_fcoe_config_gd_re_421_n1_1_chapter4.html



A company is running a pair of Cisco Nexus 7706 Series Switches as part of a data center segment. All network engineers have restricted read-write access to the core switches. A network engineer must add a new FCoE VLAN to allow traffic from servers toward FCoE storage. Which set of actions must be taken to meet these requirements?

  1. 1. Assign the network-admin role to a user. 2. Commit the role to the switch to the active user database.
  2. 1. Modify a network-operator role and add the required privileges. 2. Assign a VDC-operator role to a user.
  3. 1. Create a user-defined role and add the required privileges. 2. Assign a role to a user.
  4. 1. Add the required privilege to the VDC-admin role. 2. Commit the changes to the active user database.

Answer(s): C

Explanation:

User roles contain rules that define the operations allowed for the user who is assigned the role. Each user role can contain multiple rules and each user can have multiple roles. For example, if role1 allows access only to configuration operations, and role2 allows access only to debug operations, then users who belong to both role1 and role2 can access configuration and debug operations. You can also limit access to specific VLANs, virtual routing and forwarding instances (VRFs), and interfaces.
The Cisco NX-OS software provides four default user roles:
* network-admin-Complete read-and-write access to the entire NX-OS device (only available in the default VDC)
* network-operator-Complete read access to the entire NX-OS device (only available in the default VDC)
* vdc-admin-Read-and-write access limited to a VDC
* vdc-operator-Read access limited to a VDC
Note: You cannot change the default user roles.


Reference:

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/guide/sec_nx-os-cfg/sec_rbac.html#wp1431408



Which communication method does NFS use for requests between servers and clients?

  1. SMB
  2. RPC
  3. SSC
  4. XDR

Answer(s): B

Explanation:

The Network File System (NFS) is an application where the user can view, store and update the files on a remote device. NFS allows the user to mount all or a part of a file system on a server. NFS uses Remote Procedure Calls (RPC) to route requests between the users and servers.


Reference:

https://www.cisco.com/c/en/us/td/docs/routers/nfvis/config/3-7-1/nfvis-config-guide-3-7-1/nfvis-config-guide_chapter_01100.html



What is an advantage of NFSv4 over Fibre Channel Protocol?

  1. uses IP transport
  2. congestion management
  3. improved security
  4. lossless throughput

Answer(s): C

Explanation:


Reference:

https://www.rcannings.com/san-storage-fc-vs-fcoe-vs-iscsi/



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