Cisco 642-997 Online Practice Questions and Exam Preparation

Cisco 642-997 Online Questions & Answers

• Question 21:

  Which statement describes what happens if a new EPLD version is released with a new Cisco NX-OS version for a Cisco Nexus switch, but these EPLDs are not upgraded at the same time that NX-OS is upgraded?

  A. Any new hardware or software feature that depends on the updated EPLD image is disabled until upgraded.
  B. Modules that use an updated EPLD image remain offline until the EPLD is upgraded.
  C. The EPLD image version mismatch is detected by the supervisor, which automatically initiates an upgrade.
  D. The Cisco NX-OS upgrade fails as a result of the mismatch between EPLDs and NX-OS versions.
  A. Any new hardware or software feature that depends on the updated EPLD image is disabled until upgraded.

• Question 22:

  Which statement about RBAC user roles on a Cisco Nexus switch is true?

  A. If you belong to multiple roles, you can execute only the commands that are permitted by both roles (logical AND).
  B. Access to a command takes priority over being denied access to a command.
  C. The predefined roles can only be changed by the network administrator (superuser).
  D. The default SAN administrator role restricts configuration to Fibre Channel interfaces.
  E. On a Cisco Nexus 7000 Series Switch, roles are shared between VDCs.
  B. Access to a command takes priority over being denied access to a command.

  ---

  If you belong to multiple roles, you can execute a combination of all the commands permitted by these roles. Access to a command takes priority over being denied access to a command. For example, suppose a user has RoleA, which

  denied access to the configuration commands. However, the users also have RoleB, which has access to the configuration commands. In this case, the users have access to the configuration commands.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guid e/cli/CLIConfigurationGuide/sec_rbac.html

• Question 23:

  Which two options are limitations of NetFlow Version 5? (Choose two.)

  A. no support for IPv6, Layer 2, or MPLS fields
  B. fixed field specifications
  C. excessive network utilization
  D. analyzes all packets on the interface
  A. no support for IPv6, Layer 2, or MPLS fields
  B. fixed field specifications

• Question 24:

  What is an Overlay Transport Virtualization extended VLAN?

  A. the VLAN used to locate other AEDs
  B. the VLAN used to access the overlay network by the join interface
  C. the user VLAN that exists in multiple sites
  D. the VLAN that must contain the overlay interface
  C. the user VLAN that exists in multiple sites

  ---

  Functions of OTV Maintains a list of overlays Maintains a list of configured overlay parameters such as name, multicast address, encapsulation type, authentication, and OTV feature sets Maintains the state of the overlay interface Maintains the status of OTV VLAN membership from Ethernet infrastructure and the state of the authoritative edge device (AED) from IS-IS Maintains a database of overlay adjacencies as reported by IS-IS Maintains IP tunnel information and manages the encapsulation for data sent on the overlay network Manages delivery groups (DGs) for each overlay by snooping multicast traffic and monitoring traffic streams for active DGs Configures, starts, and stops the OTV IS-IS instance Interfaces with IP multicast to join provider multicast groups for each overlay

• Question 25:

  What is the Overlay Transport Virtualization site VLAN used for?

  A. to allow the join interfaces at different sites to communicate
  B. to detect devices at the site that are not capable of OTV
  C. to allow multiple site AEDs to communicate with each other
  D. to detect other OTV edge devices in the site
  D. to detect other OTV edge devices in the site

  ---

  The edge device performs OTV functions: it receives the Layer 2 traffic for all VLANs that need to be extended to remote locations and dynamically encapsulates the Ethernet frames into IP packets that are then sent across the transport

  infrastructure. It is expected that at least two OTV edge devices are deployed at each data center site to improve the resiliency.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/DC I3_OTV_Intro/DCI_1.html

• Question 26:

  When creating a VDC on a Cisco Nexus 7000 switch, which command in the VDC designates that only 10 port channels can be created in that VDC?

  A. allocate resource port-channel 10
  B. limit-resource port-channel minimum 0 maximum 10
  C. allow-resource port-channel maximum 10
  D. port-channel maximum 10
  B. limit-resource port-channel minimum 0 maximum 10

• Question 27:

  Which command ensures that a learned MAC address is stored within NVRAM?

  A. switchport port-security mac-address address [vlan vlan-ID]
  B. switchport port-security
  C. switchport port-security mac-address sticky
  D. feature port-security
  C. switchport port-security mac-address sticky

• Question 28:

  Which of the following Cisco Nexus features is best managed with DCNM-LAN?

  A. VSS
  B. Domain parameters
  C. Virtual switches
  D. AAA
  C. Virtual switches

  ---

  DCNM-LAN supports the following platforms:

  Cisco Nexus 1000V switches

  Cisco Nexus 2000 Fabric Extenders

  Cisco Nexus 4000 Series switches

  Cisco Nexus 5000 Series switches

  Catalyst 6500

  DCNM-LAN provides limited support for the Catalyst 6500 Series switches that runs classic IOS version 12.2(33)SXI or higher.

  DCNM-LAN supports the viewing of the current configuration attributes of the device.

  DCNM-LAN does not support changing the configuration of the device.

  DCNM-LAN supports the Firewall Service Module (FWSM) version 4.0 or higher for the Catalyst 6500 Series switches.

  Cisco Nexus 7000 Series switches

• Question 29:

  

  Ethernet interface 1/5 on Cisco Nexus 5548 is connected to Cisco UCS C220 rack server. What is the status of Ethernet 1/5 interface for FCoE functionality?

  A. Interface reset on Ethernet 1/5 is preventing the FCoE connection from coming up
  B. MTU size of 1500 on Ethernet interface 1/5 needs to be changed for FCoE to come UP
  C. Cisco Nexus 5548 needs a layer 3 daughter card for FCoE to come UP on the Ethernet interface 1/5
  D. Ethernet interface 1/5 is operational for FCoE and the status is UP
  D. Ethernet interface 1/5 is operational for FCoE and the status is UP

• Question 30:

  Which two statements about Cisco Nexus 7000 line cards are true? (Choose two.)

  A. M1, M2, and F1 cards are allowed in the same VDC.
  B. M line cards are service-oriented and likely face the access layer and provide Layer 2 connectivity.
  C. F line cards are performance-oriented and likely connect northbound to the core layer for Layer 3 connectivity.
  D. M line cards support Layer 2, Layer 3, and Layer 4 with large forwarding tables and a rich feature set.
  E. The F2 line card must reside in the admin VDC.
  A. M1, M2, and F1 cards are allowed in the same VDC.
  D. M line cards support Layer 2, Layer 3, and Layer 4 with large forwarding tables and a rich feature set.

  ---

  Cisco is introducing a new line card called as F3 Module which has rich feature set and offers high performance 40G/100G port density to the Nexus 7000 product family. Cisco also introduced a new feature in NX-OS 6.2(2) where the F2e line card can be in the same VDC as M1 or M2 Line Card. The objective of this session is to cover detailed steps and methodology of migrating Nexus 7000 with VDC types prior to NX-OS 6.2 to the newer F3 or M/F2e VDC types. The session also covers the effect of VDC migration with commonly used Network features, firewall and load balancer services. M-Series XL modules support larger forwarding tables. M-Series modules are frequently required at network core, peering, and aggregation points. When used with the F1-Series, the M-Series modules provide inter-VLAN services and form a pool of Layer 3 resources for the system.

  Reference: https://www.ciscolive2014.com/connect/sessionDetail.ww?SESSION_ID=2244

  And http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/VMDC/2- 6/vmdctechwp.html