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Q451. Refer to the exhibit.
If a console port is configured as shown, which response is displayed when you connect to the console port?
A. a blinking cursor
B. the message "Authorized users only"
C. the username prompt
D. three username name prompts followed by a timeout message
E. the message "Connection refused"
Answer: A
Q452. Which two statements about VPLS are true? (Choose two.)
A. Split horizon is used on PE devices to prevent loops.
B. Spanning tree is extended from CE to CE.
C. IP is used to switch Ethernet frames between sites.
D. PE routers dynamically associate to peers.
E. VPLS extends a Layer 2 broadcast domain.
Answer: A,E
Q453. Which two statements about MAC Authentication Bypass are true? (Choose two.)
A. Traffic from an endpoint is authorized to pass after MAB authenticates the MAC address of the endpoint.
B. During the learning stage, the switch examines multiple packets from the endpoint to determine the MAC address of the endpoint.
C. After the switch learns the MAC address of the endpoint, it uses TACACS+ to authenticate it.
D. After learning a source MAC address, it sends the host a RADIUS Account-Request message to validate the address.
E. The MAC address of a device serves as its user name and password to authenticate with a RADIUS server.
Answer: A,E
Q454. Which statement about NAT64 is true?
A. NAT64 provides address family translation and translates IPv4 to IPv6 and IPv6 to IPv4.
B. NAT64 provides address family translation and can translate only IPv6 to IPv4.
C. NAT64 should be considered as a permanent solution.
D. NAT64 requires the use of DNS64.
Answer: A
Q455. What are two benefits of NVI? (Choose two.)
A. It provides scalability by maintaining a NAT table on every interface.
B. It can dynamically create a static route to the NAT pool for translation.
C. It supports the use of route maps for policy-based NAT.
D. It supports the use of a single interface for translations.
E. It injects a route into the existing routing protocol that directs translation to the NAT pool.
Answer: A,B
Q456. Refer to the exhibit.
Which log levels are enabled for the console?
A. informational only
B. informational and debugging
C. informational, debugging, notifications, warnings, errors, critical, alerts, and emergencies
D. informational, notifications, warnings, errors, critical, alerts, and emergencies
Answer: D
Q457. Which three statements about OSPFv3 address families are true? (Choose three.)
A. Each address family requires the same instance ID.
B. Address families can perform route redistribution into any IPv4 routing protocol.
C. An address family can have two device processes on each interface.
D. IPv4 address family require an IPv4 address to be configured on the interface.
E. Each address family uses a different shortest path tree.
F. Different address families can share the same link state database.
Answer: B,D,E
Q458. Which statement about the OSPF Loop-Free Alternate feature is true?
A. It is supported on routers that are configured with virtual links.
B. It is supported in VRF OSPF instances.
C. It is supported when a traffic engineering tunnel interface is protected.
D. It is supported when traffic can be redirected to a primary neighbor.
Answer: B
Explanation:
Restrictions for OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute
. The OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute feature is not supported on devices that are virtual links headends.
. The feature is supported only in global VPN routing and forwarding (VRF) OSPF
Instances.
. The only supported tunneling method is MPLS.
. You cannot configure a traffic engineering (TE) tunnel interface as a protected interface. Use the MPLS Traffic Engineering—Fast Reroute Link and Node Protection feature to protect these tunnels. For more information, see the “MPLS Traffic Engineering—Fast Reroute Link and Node Protection” section in the Multiprotocol Label Switching Configuration Guide.
. You can configure a TE tunnel interface in a repair path, but OSPF will not verify the tunnel’s placement; you must ensure that it is not crossing the physical interface that it is intended to protect.
. Not all routes can have repair paths. Multipath primary routes might have repair paths for all, some, or no primary paths, depending on the network topology, the connectivity of the computing router, and the attributes required of repair paths.
. Devices that can be selected as tunnel termination points must have a /32 address advertised in the area in which remote LFA is enabled. This address will be used as a tunnel termination IP. If the device does not advertise a /32 address, it may not be used for remote LFA tunnel termination.
. All devices in the network that can be selected as tunnel termination points must be configured to accept targeted LDP sessions using the mpls ldp discovery targeted-hello accept command.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-3s/iro-xe-3s-book/iro-ipfrr-lfa.html
Q459. A GRE tunnel is down with the error message %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error.
Which two options describe possible causes of the error? (Choose two.)
A. Incorrect destination IP addresses are configured on the tunnel.
B. There is link flapping on the tunnel.
C. There is instability in the network due to route flapping.
D. The tunnel mode and tunnel IP address are misconfigured.
E. The tunnel destination is being routed out of the tunnel interface.
Answer: C,E
Explanation:
The %TUN-5-RECURDOWN: Tunnel0 temporarily disabled due to recursive routing error message means that the generic routing encapsulation (GRE) tunnel router has discovered a recursive routing problem. This condition is usually due to one of these causes:
. A misconfiguration that causes the router to try to route to the tunnel destination address using the tunnel interface itself (recursive routing)
. A temporary instability caused by route flapping elsewhere in the network
Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/22327-gre-flap.html
Q460. DRAG DROP
Drag and drop the path-selection criteria on the left into the correct route-selection order on the right, that a router will use when having multiple routes toward the same destination.
Answer: