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QUESTION NO:4

Refer to the exhibit.

R1 has an EBGP session to ISP 1 and an EBGP session to ISP 2. R1 receives the same prefixes

through both links.

Which configuration should be applied so that the link between R1 and ISP 2 will be preferred for

outgoing traffic (R1 to ISP 2)?

A. Increase local preference on R1 for received routes

B. Decrease local preference on R1 for received routes

C. Increase MED on ISP 2 for received routes

D. Decrease MED on ISP 2 for received routes

Answer: A

Explanation: Explanation

Local preference is an indication to the AS about which path has preference to exit the AS in order

to reach a certain network. A path with higher local preference is preferred more. The default value

of preference is 100.

Reference

http://www.cisco.com/en/US/tech/tk872/technologies_configuration_example09186a0080b82d1f.s

html?

referring_site=smartnavRD


QUESTION NO:6

Why would a rogue host that is running a DHCP server on a campus LAN network present a

security risk?

A. It may allocate IP addresses from an unknown subnet to the users.

B. All multicast traffic can be sniffed by using the DHCP multicast capabilities.

C. The CPU utilization of the first hop router can be overloaded by exploiting DHCP relay open

ports.

D. A potential man-in-the-middle attack can be used against the clients.

Answer: D

Explanation:


QUESTION NO:13

Which two statements are true about traffic shaping? (Choose two.)

A. Out-of-profile packets are queued.

B. It causes TCP retransmits.

C. Marking/remarking is not supported.

D. It does not respond to BECN and ForeSight Messages.

E. It uses a single/two-bucket mechanism for metering.

Answer: A,C

Explanation:


QUESTION NO:20

Refer to the exhibit.

What is the potential issue with this configuration?

A. There is no potential issue; OSPF will work fine in any condition.

B. Sub-optimal routing may occur since there is no area 1 adjacency between the ABRs.

C. This is a wrong OSPF configuration because all routers must be in area 0 only.

D. This is a wrong OSPF configuration because /30 requires 0.0.0.3 wild card.

Answer: B

Explanation:


QUESTION NO:21

Refer to the exhibit.

A packet from RTD with destination RTG, is reaching RTB. What is the path this packet will take

from RTB to reach RTG?

A. RTB – RTA – RTG

B. RTB – RTD – RTC – RTA – RTG

C. RTB – RTF – RTE – RTA – RTG

D. RTB will not be able to reach RTG since the OSPF configuration is wrong.

Answer: C

Explanation:


Latest 400-101 Dumps400-101 PDF Dumps400-101 Exam Questions

QUESTION NO:23

What action will a BGP route reflector take when it receives a prefix marked with the community

attribute NO ADVERTISE from a client peer?

A. It will advertise the prefix to all other client peers and non-client peers.

B. It will not advertise the prefix to EBGP peers.

C. It will only advertise the prefix to all other IBGP peers.

D. It will not advertise the prefix to any peers.

Answer: D

Explanation:


QUESTION NO:29

What is the first thing that happens when IPv6 is enabled on an interface on a host?

A. A router solicitation is sent on that interface.

B. There is a duplicate address detection on the host interface.

C. The link local address is assigned on the host interface.

D. A neighbor redirect message is sent on the host interface.

Answer: B

Explanation:

Duplicate address detection (DAD) is used to verify that an IPv6 home address is unique on the

LAN before assigning the address to a physical interface (for example, QDIO). z/OS

Communications Server responds to other nodes doing DAD for IP addresses assigned to the

interface.

Reference

http://publib.boulder.ibm.com/infocenter/zos/v1r12/index.jsp?topic=/com.ibm.zos.r12.hale001

/ipv6d0021002145.htm


QUESTION NO:38

Refer to the exhibit.

This is an MPLS VPN network with OSPF as the PE-CE routing protocol. Which statement is

correct?

A. The routing inside the VPN RED will never work correctly.

B. The routing inside the VPN RED can be enabled by configuring virtual links between the PE

routers.

C. The routing inside the VPN RED can be enabled by configuring area 0 inside the VRF on the

PE routers.

D. The routing inside the VPN RED will work without any special OSPF configuration.

E. The routing inside the VPN RED will work if the PE routers have a full mesh of sham-links

configured for VRF RED.

Answer: D Explanation:

http://www.cisco.com/en/US/docs/net_mgmt/vpn_solutions_center/1.1/user/guide/VPN_UG1.html


QUESTION NO:39

Which two statements are correct about Nonstop Forwarding? (Choose two.)

A. It allows the standby RP to take control of the device after a hardware or software fault on the

active RP.

B. It is a Layer 3 function that works with SSO to minimize the amount of time a network is

unavailable to users following a switchover.

C. It is supported by the implementation of EIGRP, OSPF, RIPv2, and BGP protocols.

D. It synchronizes startup configuration, startup variables, and running configuration.

E. The main objective of NSF is to continue forwarding IP packets following a switchover.

F. Layer 2 802.1w or 802.1s must be used, as 802.1d cannot process the Layer 2 changes.

G. Routing protocol tuning parameters must be the same as the NSF parameters, or failover will

be inconsistent.

Answer: B,E

Explanation: Explanation

Cisco Nonstop Forwarding (NSF) works with the Stateful Switchover (SSO) feature in Cisco IOS

software. NSF works with SSO to minimize the amount of time a network is unavailable to its

users following a switchover. The main objective of Cisco NSF is to continue forwarding IP

packets following a Route Processor (RP) switchover.

Reference

http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fsnsf20s.html


QUESTION NO:41

On a router, interface S0 is running EIGRPv6, and interface S1 is running OSPFv3. A

redistribution command is issued under OSPFv3, redistribute EIGRP 1 metric 20 under ipv6 router

ospf 1. What will happen after applying this redistribution command?

A. All routes showing up as D and D EX in the routing table will be redistributed into OSPFv3.

B. All routes showing up as D, D EX, and C in the routing table will be redistributed into OSPFv3.

C. All routes showing up as D and D EX in the routing table and the S0 interface will be

redistributed into OSPFv3.

D. All routes showing up as D in the routing table will be redistributed into OSPFv3.

E. All routes showing up as D EX in the routing table will be redistributed into OSPFv3.

Answer: A

Explanation:

D are EIGRP Internal Routes and D EX are EIGRP external routes. Both Internal and External

EIGRP routes will be redistributed with the configuration shown above


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