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Question 1:

What are three features that are enabled by generating Change of Authorization (CoA) requests in a push model? (Choose three)

A. session reauthentication

B. session identification

C. host reauthentication

D. MAC identification

E. session termination

F. host termination

Correct Answer: BCE

Question 2:

Which two statements about a wireless access point configured with the guest-mode command are true? (Choose two)

A. It can support more than one guest-mode SSID.

B. It supports associations by clients that perform passive scans.

C. It allows clients configured without SSIDs to associate.

D. It allows associated clients to transmit packets using its SSID.

E. If one device on a network is configure in guest-mode, clients can use the guest-mode SSID to connect to any device in the same network.

Correct Answer: BC

Question 3:

Which two statements about ICMP redirect messages are true? (Choose two)

A. Redirects are only punted to the CPU if the packets are also source-routed.

B. The messages contain an ICMP Type 3 and ICMP code 7.

C. By default, configuring HSRP on the interface disables ICMP redirect functionality.

D. They are generated when a packet enters and exits the same route interface.

E. They are generated by the host to inform the router of an temate route to the destination.

Correct Answer: CD

Question 4:

Which three statements about VRF-Aware Cisco Firewall are true? (Choose three)

A. It supports both global and per-VRF commands and DoS parameters.

B. It enables service providers to deploy firewalls on customer devices.

C. It can generate syslog messages that are visible only to individual VPNs.

D. It can support VPN networks with overlapping address ranges without NAT.

E. It enables service providers to implement firewalls on PE devices.

F. It can run as more than one instance.

Correct Answer: CEF

Question 5:

Which OpenStack project has orchestration capabilities?

A. Cinder

B. Horizon

C. Sahara

D. Heat

Correct Answer: D

Latest 400-251 Dumps400-251 Practice Test400-251 Braindumps

Question 6:

Which option best describes RPL?

A. RPL stands for Routing over low priority links that use link-state LSAs to determine the best route between two root border routers.

B. RPL stands for Routing over low priority links that use distance vector DOGAG to determine the best route between two root border routers.

C. RPL stands for Routing over Low-power Lossy Networks that use link-state LSAs to determine the best route between leaves and the root border router.

D. RPL stands for Routing over Low-power Lossy Networks that use distance vector DOGAG to determine the best route between leaves and the root border router.

Correct Answer: D

Question 7:

Refer to the exhibit. Which effect of this configuration is true?

A. Users attempting to access the console port are authenticated against the TACACS server.

B. The device tries to reach the server every 24 hours and falls back to the LOCAL database if it fails.

C. If TACACS authentication fails, the ASA uses Cisco 123 as its default password.

D. The servers in the TACACS group are reactivated every 1440 seconds.

E. Any VPN user with a session timeout of 24 hours can access the device.

Correct Answer: A

Question 8:

Refer to the exhibit. Which two effects of this configuration are true? (Choose two)

A. The BGP neighbor session between R1 and R2 re-establishes after 100 minutes.

B. A warning message is displayed on R2 after it receives 50 prefixes.

C. A warning message is displayed on R2 after it receives 100 prefixes from neighbor 1.1.1.1.

D. The BGP neighbor session between R1 and R2 re-establishes after 50 minutes.

E. The BGP neighbor session tears down after R1 receive 100 prefixes from neighbor 1.1.1.1.

F. The BGP neighbor session tears down after R1 receive 200 prefixes from neighbor 2.2.2.2.

Correct Answer: CF

Question 9:

Which two statements about EVPN are true? (Choose two)

A. EVPN route exchange enables PEs to discover one another and elect a DF.

B. EVPN routes can advertise backbone MAC reachability.

C. EVLs allow you to map traffic on one or more VLANs or ports to a Bridge Domain.

D. EVPN routes can advertise VLAN membership and verify the reachability of Ethernet segments.

E. It is a next-generation Ethernet L2VPN solution that supports load balancing at the individual flow level and provider advanced access redundancy.

F. It is a next-generation Ethernet L3VPN solution that simplifies control-plane operations and enhances scalability.

Correct Answer: AB

“EVLs allow you to map traffic on one or more VLANs or ports to a Bridge Domain.” seems to be correct too. https://www.cisco.com/c/en/us/products/collateral/routers/asr-9000-series-aggregation-services-routers/ whitepaper_c11-731864.html

Question 10:

Which two events can cause a failover event on an active/standby setup? (Choose two)

A. The active unit experiences interface failure above the threshold.

B. The unit that was previously active recovers.

C. The stateful failover link fails.

D. The failover link fails.

E. The active unit fails.

Correct Answer: AE

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