Sunday, August 24, 2008

mel AR

Question 1

5 out of 5 points

Correct

Which of the following items must match in an OSPF hello packet in order for two routers to become OSPF neighbors? (Select three.)

Question 1 answers

Selected Answers:

Correct Authentication password

Correct Area ID

Correct Hello/dead intervals

Question 2 text Question 2

5 out of 5 points

Correct

Coscorp network administrator assigns an address of 239.255.8.5 to an application running on a device with an Ethernet MAC address of 01.b2.7d.05.f1.80. Which Layer 2 multicast address will this device use?

Question 2 answers

Selected Answer:

Correct 01.00.5e.7f.08.05

Question 3 text Question 3

0 out of 5 points

Incorrect

EBGP is being used to advertise the Coscorp IP blocks to the Internet. Which statement is true about EBGP?

Question 3 answers

Selected Answer:

Incorrect The next hop does not change when BGP updates are exchanged between EBGP neighbors

Question 4 text Question 4

0 out of 5 points

Incorrect

OSPF networks create Link State Advertisements (LSAs). What kind of LSA is conceived by an Area Border Router (ABR) containing route summarization of area subnets?

Question 4 answers

Selected Answer:

Incorrect "AS external summary link, type 4"

Question 5 text Question 5

5 out of 5 points

Correct

Coscorp uses OSPF as the routing protocol in their IPv6 network. Which three statements about configuring OSPF in an IPv6 network are true? (Select three).

Question 5 answers

Selected Answers:

Correct OSPF version 3 will support IPv6

Correct Multiple instances of OSPF for IPv6 can be run on a link

Correct The interface command ipv6 ospf area is all that is required to enable OSPF for IPv6 on an interface.

Question 6 text Question 6

1.67 out of 5 points

Partial Credit

Which three of the statements below correctly describe the characteristics of Autonomous Systems in routed networks? (Select three)

Question 6 answers

Selected Answers:

Correct An AS is a group of routers under the same technical administration

Correct An AS uses exterior gateway protocols (EGPs) to exchange information with other autonomous systems

Incorrect "Within an AS, all routers must run either BGP or IBGP"

Question 7 text Question 7

5 out of 5 points

Correct

"Coscorp network is using route summarization to decrease the size of the routing tables. In an EIGRP network, which of the following describes the best method for implementing summarization?"

Question 7 answers

Selected Answer:

Correct Dynamically at major network boundaries

Question 8 text Question 8

5 out of 5 points

Correct

The IGMP snooping feature has been enabled on the Coscorp multicast network. Which two statements are true about Internet Group Management Protocol (IGMP) snooping? (Select two).

Question 8 answers

Selected Answers:

Correct IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IGMP message towards the router

Correct IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches

Question 9 text Question 9

5 out of 5 points

Correct

Identify three characteristics of EIGRP feasible successors? (Select three).

Question 9 answers

Selected Answers:

Correct A feasible successor must be the next best router with a lower cost and a loop-free path.

Correct "If the successor becomes unavailable, then the feasible successor can be used immediately without recalculating for a lost route"

Correct "If the advertised distance of the non-successor route is less than the feasible distance of best route, then that route is identified as a feasible successor"

Question 10 text Question 10

1.67 out of 5 points

Partial Credit

A network administrator has decided to use IS-IS instead of OSPF in the Coscorp network. Which three are benefits of IS-IS over OSPF? (Select three.)

Question 10 answers

Selected Answers:

Correct IS-IS supports network layer protocols other than IP

Correct IS-IS produces fewer link state PDUs for a given network

Incorrect IS-IS requires fewer neighbor relationships in a broadcast multi-access network

Question 11 text Question 11

5 out of 5 points

Correct

You wish to represent some IPv6 networks in a shorter form. What number is valid representation for the 200F:0000:0000:AB00:0000:0000:0000:0000 /56 IPv6 prefix?

Question 11 answers

Selected Answer:

Correct 200F:0:0:AB00:: /56

Question 12 text Question 12

5 out of 5 points

Correct

What metric would be assigned to redistribute BGP routes into OSPF when the metric is not assigned?

Question 12 answers

Selected Answer:

Correct 1

Question 13 text Question 13

5 out of 5 points

Correct

Every routing protocol has a loop prevention mechanism. Which BGP attribute is used by BGP routers to prevent routing loops?

Question 13 answers

Selected Answer:

Correct AS-Path

Question 14 text Question 14

5 out of 5 points

Correct

"On a point-to-point IS-IS network connection, the PSNP (Partial Sequence Number Packet) is responsible for which of the following?"

Question 14 answers

Selected Answer:

Correct Acknowledging LSPs

Question 15 text Question 15

0 out of 5 points

Incorrect

Coscorp has migrated to IPv6 in their network. Which three IPv6 notations represent the same address? (Select three).

Question 15 answers

Selected Answers:

Incorrect 2031::130F::9C0:876A:130B

Incorrect 2031:0:130F:::9C0:876A:130B

Correct 2031:0:130F::9c0:876A:130B

Question 16 text Question 16

0 out of 5 points

Incorrect

Which of the following OSPF routes are supported in a Totally Stubby area? (Select two.)

Question 16 answers

Selected Answers:

Correct O* IA

Incorrect O IA

Question 17 text Question 17

5 out of 5 points

Correct

What are three key concepts that apply when configuring the EIGRP stub routing feature in a hub and spoke network? (Select three).

Question 17 answers

Selected Answers:

Correct Only remonte routers are configured as stubs

Correct A stub router should have only EIGRP hub routers as neighbors

Correct Stub routers are not queried for routes

Question 18 text Question 18

5 out of 5 points

Correct

Which three statements are true about EIGRP operation? (Select three).

Question 18 answers

Selected Answers:

Correct "When summarization is configured, the router will also create a route to null 0"

Correct Summarization is configured on a per-interface level.

Correct Automatic summarization across major network boundaries is enabled by default

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