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QUESTION NO:1

Which two commands are required to enable multicast on a router, knowing that the receivers only

support IGMPv2? (Choose two.)

A. ip pim rp-address

B. ip pim ssm

C. ip pim sparse-mode

D. ip pim passive

Answer: A,C

Explanation:

Sparse mode logic (pull mode) is the opposite of Dense mode logic (push mode), in Dense mode

it is supposed that in every network there is someone who is requesting the multicast traffic so

PIM-DM routers begin by flooding the multicast traffic out of all their interfaces except those from

where a prune message is received to eliminate the

QUESTION NO:5

Refer to the exhibit.

A small enterprise connects its office to two ISPs, using separate T1 links. A static route is used

for the default route, pointing to both interfaces with a different administrative distance, so that one

of the default routes is preferred.

Recently the primary link has been upgraded to a new 10 Mb/s Ethernet link.

After a few weeks, they experienced a failure. The link did not pass traffic, but the primary static

route remained active. They lost their Internet connectivity, even though the backup link was

operating.

Which two possible solutions can be implemented to avoid this situation in the future? (Choose

two.)

A. Implement HSRP link tracking on the branch router R1.

B. Use a track object with an IP SLA probe for the static route on R1.

C. Track the link state of the Ethernet link using a track object on R1.

D. Use a routing protocol between R1 and the upstream ISP.

Answer: B,D

Explanation:

Interface Tracking

Interface tracking allows you to specify another interface on the router for the HSRP process to

monitor in order to alter the HSRP priority for a given group.

If the specified interface’s line protocol goes down, the HSRP priority of this router is reduced,

allowing another HSRP router with higher priority can become active (if it has preemption

enabled).

To configure HSRP interface tracking, use the standby [group] track interface [priority] command.

When multiple tracked interfaces are down, the priority is reduced by a cumulative amount. If you

explicitly set the decrement value, then the value is decreased by that amount if that interface is

down, and decrements are cumulative. If you do not set an explicit decrement value, then the

value is decreased by 10 for each interface that goes down, and decrements are cumulative.

The following example uses the following configuration, with the default decrement value of 10.

Note: When an HSRP group number is not specified, the default group number is group 0.

interface ethernet0

ip address 10.1.1.1 255.255.255.0

standby ip 10.1.1.3

standby priority 110

standby track serial0

standby track serial1

The HSRP behavior with this configuration is:

0 interfaces down = no decrease (priority is 110)

1 interface down = decrease by 10 (priority becomes100)

2 interfaces down = decrease by 10 (priority becomes 90)

Reference

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_tech_note09186a0080094a91.shtml#i

ntracking

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:18

Refer to the exhibit.

Which statement is correct about the prefix 160.0.0.0/8?

A. The prefix has encountered a routing loop.

B. The prefix is an aggregate with an as-set.

C. The prefix has been aggregated twice, once in AS 100 and once in AS 200.

D. None of these statements is true.

Answer: B

Explanation:

QUESTION NO:30

What is the flooding scope of an OSPFv3 LSA, if the value of the S2 bit is set to 1 and the S1 bit is

set to 0?

A. link local

B. area wide

C. AS wide

D. reserved

Answer: C

Explanation:

The Type 1 router LSA is now link local and the Type 2 Network LSA is AS Wide

S2 and S1 indicate the LSA’s flooding scope. Table 9-1 shows the possible values of these two

bits and the associated flooding scopes.

Table 9-1 S bits in the OSPFv3 LSA Link State Type field and their associated flooding scopes

LSA Function Code, the last 13 bits of the LS Type field, corresponds to the OSPFv2 Type field.

Table 9-2 shows the common LSA types used by OSPFv3 and the values of their corresponding

LS Types. If you decode the hex values, you will see that the default U bit of all of them is 0. The S

bits of all LSAs except two indicate area scope. Of the remaining two, AS External LSAs have an

AS flooding scope and Link LSAs have a linklocal flooding scope. Most of the OSPFv3 LSAs have

functional counterparts in OSPFv2; these OSPFv2 LSAs and their types are also shown in Table

9-2.

Table 9-2 OSPFv3 LSA types and their OSPFv2 counterparts

Reference

http://www.networkworld.com/subnets/cisco/050107-ch9-ospfv3.html?page=1

400-101 PDF Dumps400-101 Exam Questions400-101 Braindumps

QUESTION NO:31

How will EIGRPv6 react if there is an IPv6 subnet mask mismatch between the Global Unicast

addresses on a point-to-point link?

A. EIGRPv6 will form a neighbor relationship.

B. EIGRPv6 will not form a neighbor relationship.

C. EIGRPv6 will form a neighbor relationship, but with the log MSG: “EIGRPv6 neighbor not on a

common subnet.”

D. EIGRPv6 will form a neighbor relationship, but routes learned from that neighbor will not be

installed in the routing table.

Answer: A Explanation:

http://www.ietf.org/rfc/rfc3587.txt

QUESTION NO:36

For which routes does LDP advertise a label binding?

A. all routes in the routing table

B. only the IGP and BGP routes in the routing table

C. only the BGP routes in the routing table

D. only the IGP routes in the routing table

Answer: D

Explanation:

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

QUESTION NO:42

Which type of domains is interconnected using Multicast Source Discovery Protocol?

A. PIM-SM

B. PIM-DM

C. PIM-SSM

D. DVMRP

Answer: A

Explanation: Multicast Source Discovery Protocol (MSDP) is a Protocol Independent Multicast

(PIM) family multicast routing protocol defined by Experimental RFC 3618. MSDP interconnects

multiple IPv4 PIM Sparse-Mode (PIM-SM) domains which enables PIM-SM to have Rendezvous

Point (RP) redundancy and inter-domain multicasting.

Reference

http://en.wikipedia.org/wiki/Multicast_Source_Discovery_Protocol

QUESTION NO:54

What does Cisco recommend when you are enabling Cisco IOS IPS?

A. Do not enable all the signatures at the same time.

B. Do not enable the ICMP signature.

C. Disable the Zone-Based Policy Firewall because it is not compatible with Cisco IOS IPS.

D. Disable CEF because it is not compatible with Cisco IOS IPS. .

Answer: A

Explanation:

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