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Q31. Refer to the exhibit. Which statement about the command output is true?
A. The router exports flow information to 10.10.10.1 on UDP port 5127.
B. The router receives flow information from 10.10.10.2 on UDP port 5127.
C. The router exports flow information to 10.10.10.1 on TCP port 5127.
D. The router receives flow information from 10.10.10.2 on TCP port 5127.
Answer: A
Explanation:
Q32. Which encapsulation supports an interface that is configured for an EVN trunk?
A. 802.1Q
B. ISL
C. PPP
D. Frame Relay
E. MPLS
F. HDLC
Answer: A
Explanation:
Restrictions for EVN
An EVN trunk is allowed on any interface that supports 802.1q encapsulation, such as Fast Ethernet,
Gigabit Ethernet, and port channels.
A single IP infrastructure can be virtualized to provide up to 32 virtual networks end-to-end.
If an EVN trunk is configured on an interface, you cannot configure VRF-Lite on the same interface.
OSPFv3 is not supported; OSPFv2 is supported.
Reference:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/evn/configuration/xe-3s/evn-xe-3s- book/evnoverview.Pdf
Q33. What is the primary service that is provided when you implement Cisco Easy Virtual Network?
A. It requires and enhances the use of VRF-Lite.
B. It reduces the need for common services separation.
C. It allows for traffic separation and improved network efficiency.
D. It introduces multi-VRF and label-prone network segmentation.
Answer: C
Explanation:
Q34. Which type of traffic does DHCP snooping drop?
A. discover messages
B. DHCP messages where the source MAC and client MAC do not match
C. traffic from a trusted DHCP server to client
D. DHCP messages where the destination MAC and client MAC do not match
Answer: B
Explanation:
The switch validates DHCP packets received on the untrusted interfaces of VLANs with DHCP snooping
enabled. The switch forwards the DHCP packet unless any of the following conditions occur (in which case the packet is dropped):
The switch receives a packet (such as a DHCPOFFER, DHCPACK, DHCPNAK, or DHCPLEASEQUERY
packet) from a DHCP server outside the network or firewall.
The switch receives a packet on an untrusted interface, and the source MAC address and the DHCP client
hardware address do not match. This check is performed only if the DHCP snooping MAC address
verification option is turned on. · The switch receives a DHCPRELEASE or DHCPDECLINE message from an untrusted host with an entry in the DHCP snooping binding table, and the interface information in the binding table does not match the interface on which the message was received.
The switch receives a DHCP packet that includes a relay agent IP address that is not 0.0.0.0. To support
trusted edge switches that are connected to untrusted aggregation-switch ports, you can enable the DHCP
option-82 on untrusted port feature, which enables untrusted aggregation- switch ports to accept DHCP
packets that include option-82 information. Configure the port on the edge switch that connects to the
aggregation switch as a trusted port. Reference: http:// www.cisco.com/c/en/us/td/docs/switches/lan/
catalyst6500/ios/12- 2SX/configuration/guide/book/snoodhcp.html
Topic 7, Mix Questions
83. Which two commands would be used to troubleshoot high memory usage for a process? (Choose two.)
A. router#show memory allocating-process table
B. router#show memory summary
C. router#show memory dead
D. router#show memory events
E. router#show memory processor statistics
Answer: A,B
Explanation:
Q35. A company's corporate policy has been updated to require that stateless, 1-to-1, and IPv6 to IPv6 translations at the Internet edge are performed. What is the best solution to ensure compliance with this new policy?
A. NAT64
B. NAT44
C. NATv6
D. NPTv4
E. NPTv6
Answer: E
Explanation:
NPTv6 provides a mechanism to translate the private internal organization prefixes to public globally
reachable addresses. The translation mechanism is stateless and provides a 1:1 relationship between the internal addresses and external addresses. The use cases for NPTv6 outlined in the RFC include peering with partner networks, multi homing, and redundancy and load sharing.
Reference:
http://www.cisco.com/c/dam/en/us/td/docs/solutions/SBA/August2012/Cisco_SBA_BN_IPv6AddressingGuide-Aug2012.pdf
Q36. Refer to the exhibit. The DHCP client is unable to receive a DHCP address from the DHCP server. Consider the following output:
hostname RouterB ! interface fastethernet 0/0
ip address 172.31.1.1 255.255.255.0 interface serial 0/0 ip address 10.1.1.1 255.255.255.252
! ip route 172.16.1.0 255.255.255.0 10.1.1.2
Which configuration is required on the Router B fastethernet 0/0 port in order to allow the DHCP client to successfully receive an IP address from the DHCP server?
A. RouterB(config-if)# ip helper-address 172.16.1.2
B. RouterB(config-if)# ip helper-address 172.16.1.1
C. RouterB(config-if)# ip helper-address 172.31.1.1
D. RouterB(config-if)# ip helper-address 255.255.255.255
Answer: A
Explanation:
Q37. A network engineer finds that a core router has crashed without warning. In this situation, which feature can the engineer use to create a crash collection?
A. secure copy protocol
B. core dumps
C. warm reloads
D. SNMP
E. NetFlow
Answer: B
Explanation:
When a router crashes, it is sometimes useful to obtain a full copy of the memory image (called a core
dump) to identify the cause of the crash. Core dumps are generally very useful to your technical support representative.
Four basic ways exist for setting up the router to generate a core dump:
Using Trivial File Transfer Protocol (TFTP)
Using File Transfer Protocol (FTP)
Using remote copy protocol (rcp)
Using a Flash disk Reference: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/
tr19aa.html
Q38. Refer to the exhibit.
Which statement is true?
A. Traffic from the 172.16.0.0/16 network will be blocked by the ACL.
B. The 10.0.0.0/8 network will not be advertised by Router B because the network statement for the 10.0.0.0/8 network is missing from Router B.
C. The 10.0.0.0/8 network will not be in the routing table on Router B.
D. Users on the 10.0.0.0/8 network can successfully ping users on the 192.168.5.0/24 network, but users on the 192.168.5.0/24 cannot successfully ping users on the 10.0.0.0/8 network.
E. Router B will not advertise the 10.0.0.0/8 network because it is blocked by the ACL.
Answer: E
Explanation:
Q39. Which two functions are completely independent when implementing NAT64 over NAT-PT? (Choose two.)
A. DNS
B. NAT
C. port redirection
D. stateless translation
E. session handling
Answer: A,B
Explanation:
Network Address Translation IPv6 to IPv4, or NAT64, technology facilitates communication
between IPv6-only and IPv4-only hosts and networks (whether in a transit, an access, or an edge
network). This solution allows both enterprises and ISPs to accelerate IPv6 adoption while simultaneously
handling IPv4 address depletion. The DNS64 and NAT64 functions are completely separated, which is
essential to the superiority of NAT64 over NAT-PT. Reference: http:// www.cisco.com/c/en/us/products/
collateral/ios-nx-os-software/enterprise-ipv6- solution/white_paper_c11-676278.html
Q40. A corporate policy requires PPPoE to be enabled and to maintain a connection with the ISP, even if no interesting traffic exists. Which feature can be used to accomplish this task?
A. TCP Adjust
B. Dialer Persistent
C. PPPoE Groups
D. half-bridging
E. Peer Neighbor Route
Answer: B
Explanation:
A new interface configuration command, dialer persistent, allows a dial-on-demand routing (DDR) dialer
profile connection to be brought up without being triggered by interesting traffic. When configured, the dialer persistent command starts a timer when the dialer interface starts up and starts the connection when the timer expires. If interesting traffic arrives before the timer expires, the connection is still brought up and set as persistent. The command provides a default timer interval, or you can set a custom timer interval. To configure a dialer interface as persistent, use the following commands beginning in global configuration mode:
Command Purpose
Step 1 Router(config)# interface dialer Creates a dialer interface and number enters interface
Configuration mode.
Step 2 Router(config-if)# ip address Specifies the IP address and mask address mask of the dialer
interface as a node in the destination network to be called.
Step 3 Router(config-if)# encapsulation Specifies the encapsulation type.
type
Step 4 Router(config-if)# dialer string Specifies the remote destination to dial-string class class-name call
and the map class that defines characteristics for calls to this destination.
Step 5 Router(config-if)# dialer pool Specifies the dialing pool to use number for calls to this destination.
Step 6 Router(config-if)# dialer-group Assigns the dialer interface to a group-number dialer group.
Step 7 Router(config-if)# dialer-list Specifies an access list by list dialer-group protocol protocol- number or
by protocol and list name {permit | deny | list number to define the interesting access-list-number} packets that can trigger a call. Step 8 Router(config-if)# dialer
(Optional) Specifies the remote-name user-name
authentication name of the remote router on the destination subnetwork for a dialer interface.
Step 9 Router(config-if)# dialer Forces a dialer interface to be persistent [delay [initial] connected at all
times, even in seconds | max-attempts the absence of interesting traffic.
number]
Reference:
http://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_dia
ler_persist.html
