Download New Updated (Spring 2015) Cisco 350-029 Actual Tests 121-130

By | April 26, 2015

Ensurepass

 

QUESTION 121

Which of the following technologies can improve convergence time following a link failure in a service provider network? (Choose two.)

 

A.

RSVP

B.

MPLS TE FR

C.

MPLS VPN

D.

SNMP

E.

BFD

F.

VPLS

 

Correct Answer: BE

 

 

QUESTION 122

You are about to design a very fast convergence time on a SP network. Which feature would you utilize to declare a link failure within less than two seconds of the fault on a link?

 

A.

fast convergence SFP

B.

MTU discovery

C.

redundancy links

D.

keepalive

E.

carrier delay

 

Correct Answer: E

Explanation:

1.11. Convergence

 

 

QUESTION 123

Select the two answers that best describe the IP Event Dampening featurE.

 

A.

The IP Event Dampening uses exponential decay mechanism to suppress the effects of excessiveinterface flapping.

B.

BGP Operators use IP Event Dampening to suppress the effect of unstable internet Routes.

C.

The IP Event Dampening works with routing protocols by stopping the announcement of dampened Interface subnets in their updates.

D.

When IP Event Dampened internet routes reach their re-use limit, BGP installs them in the Routing Table and announces them to other BGP speakers.

 

Correct Answer: AC

Explanation:

1.10. High Availability

 

 

QUESTION 124

Which of the following events can NOT betuned via router configuration to provide for faster convergence following a link failure?

 

A.

Failure detection

B.

IGP LSP/LSA origination

C.

Per-hop flooding time of new link state

D.

Number of hops that need to be notified of new link state

E.

Failure reporting

 

Correct Answer: D

 

 

QUESTION 125

Refer to the exhibit. Which Cisco IOS feature does this algorithm illustrate?

 

clip_image002

 

A.

OSPF exponential back-off

B.

IP event dampening

C.

partial SPF

D.

EIGRP DUAL

E.

the Cisco MPLS traffic engineering path recalculation

 

Correct Answer: B

Explanation:

1.10. High Availability

 

clip_image003

 

 

QUESTION 126

Which configuration prevents traffic that is sourced from the unique local address scope to besent out of the link to the upstream service provider?

 

A.

interface ethernet0/0

ipv6 traffic-filter NoULA out

!

ipv6access-list NoULA

deny ipv6 FC00::/8 any

permit ipv6 any any

B.

interface ethernet0/0

ipv6 traffic-filter NoULA out

!

ipv6 access-list NoULA

deny ipv6 FC00::/7 any

permit ipv6 any any

C.

interface ethernet0/0

ipv6 access-group NoULA out

!

ipv6access-list NoULA

deny ipv6 FC00::/8 any

permit ipv6 any any

D.

interface ethernet0/0

ipv6 access-group NoULA out

!

ipv6 access-list NoULA

deny ipv6 FC00::/7 any

permit ipv6 any any

 

Correct Answer: B

Explanation:

A unique local address (ULA) is an IPv6 address in the blockfc00::/7, defined in RFC 4193. It is the approximate IPv6 counterpart of the IPv4 private address. Unique local addresses are available for use in private networks, e.g. inside a single site or organization or spanning a limited number of sites or organizations.

 

They are not routable in the global IPv6 Internet. With our IPv6 ACL completed, we just need to apply it to an interface. There is a minor difference in syntax herE. instead of using the command ip access-group to apply our IPv6 ACL, we use the more aptly named command ipv6 traffic-filter, followed by the ACL name and a direction (in this case, “out”).

 

 

QUESTION 127

The IPv6 address FE80::656:78FF:FE9A:BCDE is what type of address?

 

A.

Site-local

B.

Link-local

C.

Multicast

D.

None of theabove

 

Correct Answer: B

Explanation:

A link-local address is an IPv6 unicast address that can be automatically configured on any interface using the link-local prefix FE80::/10 (1111 1110 10) and the interface identifier in the modified EUI-64 format. Link-local addresses are not necessarily bound to the MAC address (configured in a EUI-64 format). Link-local addresses can also be manually configured in the FE80::/10 format using the ipv6 address link-local command.

 

 

QUESTION 128

Which option is not a valid method to assign the lowest-order 64-bit field of an IPv6 unicast address?

 

A.

ARP

B.

manual assignment

C.

DHCPv6

D.

auto-configured based on the 48-bit MAC address

E.

auto-generated pseudo-random number

 

Correct Answer: A

Explanation:

I concluded, and quickly confirmed that there’s no such thing as ARP in IPv6 – so how do hosts find each other on a network? During the course of my studies, I learned that many functions like this were wrapped under the umbrella of IPv6 Neighbor Discovery, which runs on ICMPv6. The function of ARP is replaced in IPv6 by Neighbor Solicitation messages. I’d like to deep dive for a minute or two and explain exactly how this works.

 

 

 

 

 

QUESTION 129

When IPv6 is deployed by a Service Provider to bring on an IPv6 Enterprise, which transition strategy works the best?

 

A.

Deploy IPv6 at the Edges and tunnel Enterprise through the core

B.

None of the above will work

C.

Deploy IPv6 at Edges and Core at the same time for smooth transition

D.

Deploy IPv6 at the core first and then move to Edges toward the end customer

 

Correct Answer: A

 

 

QUESTION 130

Which two statements about DS-Lite are true? (Choose two.)

 

A.

IPv4 packets are carried over IPv6 tunnels to the LSN while IPv6 traffic is forwarded natively.

B.

Ipv6 packets are carried over IPv4 tunnels to the LSN while IPv4traffic is forwards natively.

C.

The LSN performs NAT44 on private IPv4 source addresses.

D.

DS-Lite does not perform any address translation.

 

Correct Answer: AC

Explanation:

Reference

“Understanding Dual-Stack Lite”

http://www.networkworld.com/community/node/46600

Dual-Stack Lite is a promising approach that takes the best of NAT464 while avoiding its problems:

It uses IPv6-only links between the provider and the customer, but does not use NAT64 translation. When a device in the customer network sends an IPv4 packet to anexternal destination, the IPv4 packet is encapsulated in an IPv6 packet for transport into the provider network. At the LSN, the packet is decapsulated and NAT44 isperformed.

 

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