Cisco 642-997 Online Practice Questions and Exam Preparation

Cisco 642-997 Online Questions & Answers

• Question 51:

  os/fabricpath/configuration/guide/fp_switching.html

  Which SCSI terminology is used to describe source and destination nodes?

  A. hosts and targets
  B. initiators and targets
  C. HBA and disks
  D. initiators and disks
  E. HBA and targets
  B. initiators and targets

  ---

  In computer data storage, a SCSI initiator is the endpoint that initiates a SCSI session, that is, sends a SCSI command. The initiator usually does not provide any Logical Unit Numbers (LUNs).

  On the other hand, a SCSI target is the endpoint that does not initiate sessions, but instead waits for initiators' commands and provides required input/output data transfers. The target usually provides to the initiators one or more LUNs,

  because otherwise no read or write command would be possible.

  Reference: http://en.wikipedia.org/wiki/SCSI_initiator_and_target

• Question 52:

  Which statement about RADIUS configuration distribution using Cisco Fabric Services on a Cisco Nexus 7000 Series Switch is true?

  A. Cisco Fabric Services does not distribute the RADIUS server group configuration or server and global keys.
  B. Enabling Cisco Fabric Services causes the existing RADIUS configuration on your Cisco NX-OS device to be immediately distributed.
  C. When the RADIUS configuration is being simultaneously changed on more than one device in a Cisco Fabric Services region, the most recent changes will take precedence.
  D. Only the Cisco NX-OS device with the lowest IP address in the Cisco Fabric Services region can lock the RADIUS configuration.
  A. Cisco Fabric Services does not distribute the RADIUS server group configuration or server and global keys.

  ---

  CFS does not distribute the RADIUS server group configuration or server and global keys. The keys are unique to the Cisco NX-OS device and are not shared with other Cisco NX- OS devices.

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/6_x/nx- os/security/configuration/guide/b_Cisco_Nexus_7000_NX- OS_Security_Configuration_Guide__Release_6-x/b_Cisco_Nexus_7000_NXOS_Security_Configuration_Guide__Release_6-x_chapter_0101.html

• Question 53:

  Which statement about enhanced zoning on Cisco Multilayer Director Switches are true?

  A. It allows partial zone set changes to be distributed without having to activate a zone set.
  B. Enhanced zoning is compatible with IVR.
  C. Zone changes can scheduled with a CRON job.
  D. More than one zone set can be active with enhanced zoning.
  A. It allows partial zone set changes to be distributed without having to activate a zone set.

  ---

  Enhanced zoning implements changes to the zoning database and distributes it without reactivation. Distribution of zone sets without activation avoids hardware changes for hard zoning in the switches.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/san_switching/6x/ b_5500_SAN_Switching_Config_6x/b_5500_SAN_Switching_Config_602N12_chapter_01 001.html#con_1871274

• Question 54:

  Refer to the exhibit.

  

  This multilayer Cisco Nexus switch had been the active virtual gateway for Group 1 before it became temporarily unavailable. What will happen to GLBP Group 1 when this device becomes available again?

  A. The currently active router remains active.
  B. It depends on the priority value that is configured active on the router.
  C. The Cisco Nexus switch becomes the active virtual gateway after 600 seconds.
  D. It depends on the weighting values that are configured active on the router.
  A. The currently active router remains active.

  ---

  GLBP prioritizes gateways to elect an active virtual gateway (AVG). If multiple gateways have the same priority, the gateway with the highest real IP address becomes the AVG. The AVG assigns a virtual MAC address to each member of the GLBP group. Each member is the active virtual forwarder (AVF) for its assigned virtual MAC address, forwarding packets sent to its assigned virtual MAC address. The AVG also answers Address Resolution Protocol (ARP) requests for the virtual IP address. Load sharing is achieved when the AVG replies to the ARP requests with different virtual MAC addresses.

  Note: Packets received on a routed port destined for the GLBP virtual IP address terminate on the local router, regardless of whether that router is the active GLBP router or a redundant GLBP router. This termination includes ping and Telnet traffic. Packets received on a Layer 2 (VLAN) interface destined for the GLBP virtual IP address terminate on the active router.

• Question 55:

  

  On a Cisco Nexus7000 switches what is true regarding Cisco FabricPath requirements?

  A. Ensure that you have installed the Enhanced Layer 2 license and that you have installed an F Series module
  B. Ensure that you have installed the Enhanced Layer 2 license and that you have installed an M Series module
  C. Ensure that you have installed the Enhanced Layer 3 license and that you have installed an M Series module
  D. Ensure that you have installed the Scalable Feature License license and that you have installed an F Series module
  A. Ensure that you have installed the Enhanced Layer 2 license and that you have installed an F Series module

  ---

  

  

  

  FabricPath switching has the following prerequisites:

  You should have a working knowledge of Classical Ethernet Layer 2 functioning.

  You must install the FabricPath feature set on the default and nondefault VDC before you information on installing the FabricPath feature set.

  You are logged onto the device.

  Ensure that you have installed the Enhanced Layer 2 license.

  You are in the correct virtual device context (VDC). A VDC is a logical representation of a set of system resources. You can use the switchto vdc command with a VDC number.

  You are working on the F Series module.

  Reference: http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-

• Question 56:

  Which function does the graceful restart feature allow a Cisco Nexus 7000 Series router to perform?

  A. Perform a rapid route convergence.
  B. Initialize a standby supervisor transparently when one is present.
  C. Remain in the data forwarding path through a process restart.
  D. Maintain a management connection throughout a router restart.
  C. Remain in the data forwarding path through a process restart.

  ---

  Graceful Restart and Non Stop Routing both allow for the forwarding of data packets to continue along known routes while the routing protocol information is being restored (in the case of Graceful Restart) or refreshed (in the case of Non Stop Routing) following a processor switchover. When Graceful Restart is used, peer networking devices are informed, via protocol extensions prior to the event, of the SSO capable routers ability to perform graceful restart. The peer device must have the ability to understand this messaging. When a switchover occurs, the peer will continue to forward to the switching over router as instructed by the GR process for each particular protocol, even though in most cases the peering relationship needs to be rebuilt. Essentially, the peer router will give the switching over router a "grace" period to re-establish the neighbor relationship, while continuing to forward to the routes from that peer.

  Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/high- availability/solution_overview_c22-487228.html

• Question 57:

  Which statement about electronic programmable logic device image upgrades is true?

  A. EPLD and ISSU image upgrades are nondisruptive.
  B. An EPLD upgrade must be performed during an ISSU system or kickstart upgrade.
  C. Whether the module being upgraded is online or offline, only the EPLD images that have different current and new versions are upgraded.
  D. You can execute an upgrade or downgrade only from the active supervisor module.
  D. You can execute an upgrade or downgrade only from the active supervisor module.

  ---

  You can upgrade (or downgrade) EPLDs using CLI commands on the Nexus 7000 Series device. Follow these guidelines when you upgrade or downgrade EPLDs:

  You can execute an upgrade from the active supervisor module only. All the modules,

  including the active supervisor module, can be updated individually.

  You can individually update each module whether it is online or offline as follows:

  If you upgrade EPLD images on an online module, only the EPLD images with version

  numbers that differ from the new EPLD images are upgraded.

  If you upgrade EPLD images on an offline module, all of the EPLD images are upgraded.

  On a system that has two supervisor modules, upgrade the EPLDs for the standby

  supervisor and then switch the active supervisor to standby mode to upgrade its EPLDs. On a system that has only one supervisor module, you can upgrade the active supervisor, but this will disrupt its operations during the upgrade.

  If you interrupt an upgrade, you must upgrade the module that is being upgraded again.

  The upgrade process disrupts traffic on the targeted module.

  Do not insert or remove any modules while an EPLD upgrade is in progress.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_0/epld/release/notes/epld_ rn.html

• Question 58:

  In the dynamic vNIC creation wizard, why are choices for Protection important?

  A. They allow reserve vNICs to be allocated out of the spares pool.
  B. They enable hardware-based failover.
  C. They select the primary fabric association for dynamic vNICs.
  D. They allow dynamic vNICs to be reserved for fabric failover.
  C. They select the primary fabric association for dynamic vNICs.

  ---

  Number of Dynamic vNICs ?This is the number of vNICs that will be available for dynamic assignment to VMs. Remember that the VIC has a limit to the number of vNICs that it can support and this is based on the number of uplinks between

  the IOM and the FI. At least this is the case with the 2104 IOM and the M81KR VIC, which supports ((# IOM Links * 15) ?2)). Also remember that your ESXi server will already have a number of vNICs used for other traffic such as Mgmt,

  vMotion, storage, etc, and that these count against the limit.

  Adapter Policy ?This determines the vNIC adapter config (HW queue config, TCP offload, etc) and you must select VMWarePassThru to support VM-FEX in High Performance mode.

  Protection ?This determines the initial placement of the vNICs, either all of them are placed on fabric A or Fabric B or they are alternated between the two fabrics if you just select the "Protected" option. Failover is always enabled on these

  vNICs and there is no way to disable the protection.

  Reference: http://infrastructureadventures.com/2011/10/09/deploying-cisco-ucs-vm-fex-for- vsphere-%E2%80%93-part-2-ucsm-config-and-vmware-integration/

• Question 59:

  Which action limits the maximum number of routes that are allowed in the routing table?

  A. Use a filter BGP.
  B. Use only static routes.
  C. Use the maximum routes command inside address family.
  D. Use a route map to filter routes.
  C. Use the maximum routes command inside address family.

• Question 60:

  When a local RBAC user account has the same name as a remote user account on an AAA server, what happens when a user with that name logs into a Cisco Nexus switch?

  A. The user roles from the remote AAA user account are applied, not the configured local user roles.
  B. All the roles are merged (logical OR).
  C. The user roles from the local user account are applied, not the remote AAA user roles.
  D. Only the roles that are defined on both accounts are merged (logical AND).
  C. The user roles from the local user account are applied, not the remote AAA user roles.

  ---

  If you have a user account configured on the local Cisco NX-OS device that has the same name as a remote user account on an AAA server, the Cisco NX-OS software applies the user roles for the local user account to the remote user, not the user roles configured on the AAA server.

  Reference: http://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