Cisco 640-875 Online Practice Questions and Exam Preparation

Cisco 640-875 Online Questions & Answers

• Question 121:

  Which statement about STP operations is true?

  A. One root bridge exists per collision domain.
  B. One root port is established per root bridge.
  C. One designated port is defined per segment.
  D. Non-designated ports are set in the forwarding state.
  E. One root port exists per broadcast domain.
  C. One designated port is defined per segment.

• Question 122:

  Which two features were introduced in ICMP version 6? (Choose two.)

  A. error reporting
  B. neighbor discovery
  C. signaling
  D. round trip estimates
  E. router discovery
  B. neighbor discovery
  E. router discovery

• Question 123:

  Which Cisco IOS XR command presents a list of all interfaces, their Layer 3 address (if configured), and the status of the interface and protocol?

  A. RP/0/RSP0/CPU0:PE1# show interface GigabitEthernet 0/0/0/1
  B. RP/0/RSP0/CPU0:PE1# show controllers
  C. RP/0/RSP0/CPU0:PE1(admin)# show hw-module fpd location all
  D. RP/0/RSP0/CPU0:PE1(config)# show bundle
  E. RP/0/RSP0/CPU0:PE1(admin)# show platform
  F. RP/0/RSP0/CPU0:PE1# show ipv4 interfaces brief
  F. RP/0/RSP0/CPU0:PE1# show ipv4 interfaces brief

• Question 124:

  If you attempt to enable 802.1x for an EtherChannel port, what happens?

  A. An error occurs, because 802.1x is not supported on EtherChannels
  B. The 802.1x authentication is extended to all of the ports in the EtherChannel bundle
  C. An error occurs, but 802.1x is enabled for the EtherChannel bundle
  D. All of the ports are removed from the EtherChannel bundle
  A. An error occurs, because 802.1x is not supported on EtherChannels

• Question 125:

  What is the Cisco recommended way to secure SNMPv2 community strings?

  A. Configure complex community string names and avoid using default settings
  B. Create multiple read/write strings to keep the attacker guessing
  C. Use access-lists to limit the amount of access to the community strings
  D. Use SNMPv3 to limit the amount of memory overhead
  C. Use access-lists to limit the amount of access to the community strings

• Question 126:

  Which three layers comprise the SONET transport hierarchy? (Choose three.)

  A. line layer
  B. path layer
  C. section layer
  D. data-link layer
  E. application layer
  F. network layer
  A. line layer
  B. path layer
  C. section layer

• Question 127:

  Refer to the exhibit.

  

  You want to configure RADIUS authentication for users who connect by using the SSH protocol. If the RADIUS server is unreachable, the users that are defined in the running configuration should be used. Which additional command should you use?

  A. aaa authentication ssh group radius backup config
  B. aaa authentication ssh group radius backup current
  C. aaa authentication list ssh group radius users
  D. aaa authentication login ssh group radius local
  D. aaa authentication login ssh group radius local

• Question 128:

  Which three statements about Cisco IOS XR CLI operations are true? (Choose three.)

  A. Cisco IOS XR uses a three-stage configuration method.
  B. Committed changes are persistent across reboots in Cisco IOS XR.
  C. The commit replace global configuration command replaces the contents of the running configuration with the target configuration.
  D. The save global configuration command saves the contents of target configuration to the running configuration.
  E. There is no concept of a startup-config in Cisco IOS XR.
  F. The clear global configuration command erases the entire current running configuration.
  G. The show running-config global configuration command displays the configuration that occurs if the contents of the uncommitted changed (target configuration) are committed to the running configuration.
  B. Committed changes are persistent across reboots in Cisco IOS XR.
  C. The commit replace global configuration command replaces the contents of the running configuration with the target configuration.
  E. There is no concept of a startup-config in Cisco IOS XR.

• Question 129:

  A networking engineer plans to create three consecutive subnets. The first subnet will support 300 hosts. The second subnet will support 200 hosts third subnet will support 180 hosts. Which subnet mask is the exact summary to use if the engineer wants to advertise one range that covers all three subnets?

  A. 255.255.255.0
  B. 255.255.252.0
  C. 255.255.255.128
  D. 255.255.254.0
  B. 255.255.252.0

• Question 130:

  Refer to the exhibit. To change the configuration from PAP to CHAP, which two actions must you perform? (Choose two.)

  

  A. In global mode, activate CHAP
  B. In the physical interfaces, configure ppp authentication chap
  C. In the multilink interface, configure ppp authentication chap
  D. On each device, configure encapsulation ppp chap
  E. On every router, create a username by using the name of the neighbor. Configure the usernames to have the same password
  C. In the multilink interface, configure ppp authentication chap
  E. On every router, create a username by using the name of the neighbor. Configure the usernames to have the same password