Ensurepass

QUESTION 271

DRAG DROP

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Correct Answer:

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QUESTION 272

DRAG DROP

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Correct Answer:

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QUESTION 273

Which option describes the effect of the OSPF default-information originate always command?

 

A.

It creates a stub area.

B.

It configures the device to advertise a default route regardless of whether it exists in the routing table.

C.

It configures the device to automatically redistribute a default route.

D.

It adds a static default route to the device configuration.

 

Correct Answer: B

Explanation:

default-information originate

To generate a default external route into an Open Shortest Path First (OSPF) routing domain, use the default-information originate command in router configuration mode. To disable this feature, use the no form of this command.

default-information originate [always] metric metric-value [ metric-type type-value ] [ route- map map-name ]

Syntax Description

always

(Optional) Always advertises the default route regardless of whether the software has a default route.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/command/ipv6-cr-book/ipv6-d2.html

 

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QUESTION 274

Which two options are reasons to manipulate the delay metric instead of the bandwidth metric for EIGRP routing? (Choose two.)

 

A.

Because the delay metric provides better handling for bursty traffic

B.

Because manipulating the bandwidth metric can also affect QoS

C.

Because manipulating the bandwidth affects only a particular path

D.

Because changes to the delay metric are propagated to all neighbors on a segment

 

Correct Answer: BD

Explanation:

Using the bandwidth to influence EIGRP paths is discouraged for two reasons:

Because changes to the delay metric are propagated to all downstream routers, changing the interface delay parameter is the preferred method of influencing path selection.

Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13673-14.html

 

 

QUESTION 275

What is the maximum number of secondary IP addresses that can be configured on a router interface?

 

A.

1

B.

2

C.

4

D.

1024

E.

65535

F.

no limit to the number of addresses

 

Correct Answer: F

Explanation:

From “IP Routing Frequently Asked Questions”

 

Q. What are the maximum number of secondary IP addesses that can be configured on a router interface?

A. There are no limits on configuring secondary IP addresses on a router interface.

 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/28745-44.html#q21

 

 

QUESTION 276

Which address is a MAC address that is mapped from an IPv6 address (RFC 2464)?

 

A.

3333.FF17.FC0F

B.

FFFE. FF17.FC0F

C.

FF34.3333.FF17

D.

FF7E.FF17.FC0F

 

Correct Answer: A

Explanation:

An IPv6 packet with a multicast destination address DST, consisting of the sixteen octets DST through DST, is transmitted to the Ethernet multicast address whose first two octets are the value 3333 hexadecimal and whose last four octets are the last four octets of DST.

Reference: https://tools.ietf.org/html/rfc2464

 

 

QUESTION 277

Which multicast protocol uses source trees and RPF?

 

A.

DVMRP

B.

PIM sparse mode

C.

CBT

D.

mOSPF

 

Correct Answer: A

Explanation:

DVMRP builds a parent-child database using a constrained multicast model to build a forwarding tree rooted at the source of the multicast packets. Multicast packets are initially flooded down this source tree. If redundant paths are on the source tree, packets are not forwarded along those paths. Forwarding occurs until prune messages are received on those parent-child links, which further constrains the broadcast of multicast packets. Reference: DVMRP and dense-mode PIM use only source trees and use RPF as previously described.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_19_ea1/configuration/guide/3550scg/swmcast.html

 

 

QUESTION 278

What is the function of the command ip pim autorp listener?

 

A.

It allows a border PIM sparse mode router to accept autorp information from another autonomous system.

B.

It allows the mapping agents to accept autorp information from the PIM rendezvous point.

C.

It allows the routers to flood the autorp information in a sparse-mode-only network.

D.

It allows a BSR to accept autorp information and translate it into BSR messages.

 

Correct Answer: C

Explanation:

To cause IP multicast traffic for the two Auto-RP groups 224.0.1.39 and 224.0.1.40 to be Protocol Independent Multicast (PIM) dense mode flooded across interfaces operating in PIM sparse mode, use the ip pim autorp listener command in global configuration mode. To disable this feature, use the no form of this command.

Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-cr-book/imc_i3.html#wp3085748429

 

 

QUESTION 279

Refer to the exhibit. Which statement is true about why the first-hop PIM IPv6 router is stuck in registering?

 

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A.

The scope of the IPv6 multicast address is link-local.

B.

The outgoing interface for the IPv6 multicast group should not be a tunnel interface.

C.

The R-bit is set in the IPv6 address, but this is not an embedded RP multicast IPv6 address.

D.

The S flag should not be set on a first-hop PIM router.

E.

A multicast IPv6 address does not start with FF.

 

Correct Answer: C

Explanation:

R bit: RP bit: R = 1 indicates the address embeds the address of the Rendezvous Point (RP). The embedded RP address needs to begin with the prefix FF70::/12, But here we see that the address is FF7E::1234.

QUESTION 280

Refer to the exhibit. Which option is the result of this configuration?

 

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A.

All SNMP traffic coming into the router is redirected to interface GigabitEthernet1/0.

B.

All SNMP traffic generated from the router is redirected to interface GigabitEthernet1/0.

C.

All SMTP traffic generated from the router is redirected to interface GigabitEthernet1/0.

D.

All POP3 traffic coming into the router is redirected to interface GigabitEthernet1/0.

E.

All SMTP traffic coming into the router is redirected to interface GigabitEthernet1/0.

 

Correct Answer: C

Explanation:

This is an example of policy based routing, where traffic sourced from this router that matches the access list (all traffic with port 25 which is SMTP) will be forced out the Gig 0/1 interface.

 

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