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Q241. 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
Q242. Which technology facilitates dynamic tunnel establishment in DMVPN?
A. CEF
B. mGRE
C. a dynamic routing protocol
D. NHRP
Answer: D
Q243. Which two statements best describes the difference between active mode monitoring and passive mode monitoring? (Choose two.)
A. Active mode monitoring is the act of Cisco PfR gathering information on user packets assembled into flows by NetFlow.
B. Active mode monitoring uses IP SLA probes for obtaining performance characteristics of the current exit WAN link.
C. Passive mode monitoring uses IP SLA to generate probes for the purpose of obtaining information regarding the characteristics of the WAN links.
D. Passive mode monitoring uses NetFlow for obtaining performance characteristics of the exit WAN links.
Answer: B,D
Q244. Which three types of traffic are protected when you implement IPsec within an IPv6-in-IPv4 tunnel? (Choose three.)
A. IPv6 link-local traffic
B. IPv6 multicast traffic
C. IPv6 unicast traffic
D. IPv4 tunnel control traffic
E. IPv4 broadcast traffic
F. IPv6 broadcast traffic
Answer: A,B,C
Q245. Refer to the exhibit.
Which additional configuration is necessary for R1 and R2 to become OSPF neighbors?
A. R1
!
router ospf 1
no passive-interface Fastethernet0/0
!
B. R2
!
router ospf 10
no network 10.1.1.6 0.0.0.0 area 0
network 10.1.1.6 0.0.0.0 area 1
!
C. R1
!
interface FastEthernet0/0
ip ospf mtu-ignore
!
R2
!
interface FastEthernet0/1
ip ospf mtu-ignore !
D. R1
!
no router ospf 1
router ospf 10
network 10.1.1.5 0.0.0.0 area 0
Answer: A
Explanation:
Because the passive interface default command is used, by default all interfaces are passive and no neighbors will form on these interfaces. We need to disable passive interface on the link to R2 by using the “no passive-interface Fastethernet0/0” on R1 under OSPF.
Q246. The OSPF database of a router shows LSA types 1, 2, 3 and 7 only. Which type of area is this router connected to?
A. backbone area
B. totally stubby area
C. stub area
D. not-so-stubby area
Answer: D
Q247. 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
Q248. When you implement PfR, which IP SLA probe is used to determine the MOS?
A. jitter
B. latency
C. packet loss
D. throughput
Answer: A
Q249. Which option is an incorrect design consideration when deploying OSPF areas?
A. area 1 - area 0 - MPLS VPN backbone - area 0 - area 2
B. area 1 - MPLS VPN backbone - area 2
C. area 1 - MPLS VPN backbone - area 1
D. area 2 - area 0 - MPLS VPN backbone - area 1
E. area 0 - area 2 - MPLS VPN superbackbone - area 1
Answer: E
Explanation:
In the case of MPLS-VPN Backbone as The OSPF superbackbone behaves exactly like Area 0 in regular OSPF, so we cannot have two different area 0’s that are not directly connected to each other. When area 0 connects to the superbackbone, it simply becomes an extension of area 0.
Q250. Which two options are causes of out-of-order packets? (Choose two.)
A. a routing loop
B. a router in the packet flow path that is intermittently dropping packets
C. high latency
D. packets in a flow traversing multiple paths through the network
E. some packets in a flow being process-switched and others being interrupt-switched on a transit router
Answer: D,E
Explanation:
In traditional packet forwarding systems, using different paths have varying latencies that cause out of order packets, eventually resulting in far lower performance for the network application. Also, if some packets are process switched quickly by the routing engine of the router while others are interrupt switched (which takes more time) then it could result in out of order packets. The other options would cause packet drops or latency, but not out of order packets.
