Cisco 640-878 Online Practice Questions and Exam Preparation

Cisco 640-878 Online Questions & Answers

• Question 31:

  Which three statements about OSPFv2 or OSPFv3 authentication are true? (Choose three.)

  A. On Cisco IOS XR platforms, OSPFv3 authentication can be configured at the OSPF routing process, area, or interface level.
  B. OSPF authentication on Cisco IOS and IOS XE platforms can be configured per area or per interface.
  C. On Cisco IOS and IOS XE and IOS XR platforms, the authentication key can only be configured per interface.
  D. OSPFv3 uses IPsec for authentication and encryption.
  E. On Cisco IOS XR platforms, the OSPF authentication that is configured for the area overrides the authentication that is configured for the interface.
  F. On Cisco IOS and IOS XE platforms, the two OSPFv2 authentication methods that are supported are MD5 and SHA1.
  A. On Cisco IOS XR platforms, OSPFv3 authentication can be configured at the OSPF routing process, area, or interface level.
  B. OSPF authentication on Cisco IOS and IOS XE platforms can be configured per area or per interface.
  D. OSPFv3 uses IPsec for authentication and encryption.

• Question 32:

  Which spanning-tree mode can be used to map several VLANs to a single spanning-tree instance?

  A. MST
  B. PVST+
  C. PVRST+
  D. RSTP
  A. MST

• Question 33:

  A customer has installed a second router and copied the configuration from the first router, as shown below. What change is needed to ensure that router 1 is the primary IP address?

  Router 1 standby 1 priority 110 standby 1 preempt

  Router 2 standby 1 priority 120 standby 1 preempt

  A. decrease the priority on router 2 to 109
  B. decrease the priority on router 1 to 109
  C. remove standby 1 preempt from router 1
  D. increase the priority on router 2 to 130
  E. increase the priority on router 1 to 119
  A. decrease the priority on router 2 to 109

• Question 34:

  DRAG DROP

  Select and Place:

  

  

• Question 35:

  Refer to the exhibit.

  

  Which three commands are required on interface fastethernet 5/6 in order to create a trunk link between another Cisco Catalyst Switch? (Choose three.)

  A. no shutdown
  B. switchport mode trunk
  C. encapsulation trunk
  D. switchport trunk encapsulation dot1Q
  E. switchport trunk enable
  F. no switchport
  G. interface fastethernet 5/6 trunk
  H. switchport trunk allow dot1Q
  A. no shutdown
  B. switchport mode trunk
  D. switchport trunk encapsulation dot1Q

• Question 36:

  Topology Diagram:

  

  Select and Place:

  

  

• Question 37:

  When upgrading a Cisco ASR 1001 Router, when is the request platform software package expand file bootflash:image-name command required?

  A. to copy the consolidated Cisco IOS XE image to the bootflash:
  B. to perform Cisco IOS ISSU on the standby route processor
  C. to run the router using a consolidated package
  D. to run the router using individual subpackages
  D. to run the router using individual subpackages

• Question 38:

  DRAG DROP

  Select and Place:

  

  

• Question 39:

  Which three statements about service provider network requirements are true? (Choose three.)

  A. Service provider networks are becoming more specialized, with providers offering only one service.
  B. Service providers connect customers to the Internet.
  C. Jitter and packet loss are no longer an issue.
  D. Multiple access technologies are supported.
  E. Customers can connect directly using copper, wireless, or fiber-optic links.
  B. Service providers connect customers to the Internet.
  D. Multiple access technologies are supported.
  E. Customers can connect directly using copper, wireless, or fiber-optic links.

• Question 40:

  Refer to the Cisco IOS XR commands exhibit.

  

  The router administrator is trying to activate a software package on the router but is not able to do so. Which statement about this problem is true?

  A. The router needs to be in the global configuration mode.
  B. The router needs to be in the admin global configuration mode.
  C. The router needs to be in the admin EXEC mode.
  D. The install activate command is not the correct command to use.
  E. The administrator needs to log in as the "root" user instead of the "admin" user.
  C. The router needs to be in the admin EXEC mode.