Download New Updated (Spring 2015) Cisco 350-029 Actual Tests 111-120

By | April 26, 2015

Ensurepass

 

QUESTION 111

What method of streaming live video is the least taxing on bandwidth in a large enterprise environment?

 

A.

TCP

B.

UDP

C.

HTTP

D.

Multicast

 

Correct Answer: D

 

 

QUESTION 112

Which three statements about anycast RP are true? (Choose three.)

 

A.

MSDP is running between anycast RPs.

B.

Anycast RP provides redundancy and load-sharing capabilities

C.

Multicast BGPis running between anycast RPs.

D.

In anycast RP, two or more RPs are configured with the same multicast IP address on loopback interfaces

E.

In anycast RP, two or more RPs are configured with the same unicast IP address on loopback interfaces

 

Correct Answer: ABE

 

 

QUESTION 113

Which are correct descriptions and configurations of Anycast RP? (Choose three).

 

A.

In Anycast RP, two or more RPs are configured with the same IP address on loopback interfaces.

B.

Anycast RP provides redundancy and load-sharing capabilities.

C.

Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip pim rpaddress 1.1.1.1

D.

Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip rp-address pim 1.1.1.1

E.

Routers with Anycast RP can be configured statically (loopback 1.1.1.1) with the command ip anycast-rp pim 1.1.1.1

 

Correct Answer: ABC

 

 

QUESTION 114

What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SMoperations?

 

A.

immediately after receiving the first packet on the shared tree for a given (S, G)

B.

after receiving over 1 kb/s traffic on the shared tree for a given (S, G)

C.

10 seconds after receiving the first packet on the shared tree for a given (S, G)

D.

30 seconds after receiving the first packet on the shared tree for a given (S, G)

E.

after receiving over 10 kb/
s traffic on the shared tree for a given (S, G)

 

Correct Answer: A

 

 

QUESTION 115

Cisco IOS XR Software Multicast Routing Implementation,which three features are supported in IPv6 on Cisco CRS router? (Choose three.)

 

A.

PIM-SSM

B.

Aggregation multicast

C.

PIM-Bidirectional

D.

OOR handling

E.

Integrated multicast

F.

Multicast NSF

 

Correct Answer: ACF

 

 

QUESTION 116

Which of the following statements is correct regarding PIM Sparse Mode operations?

 

A.

Receivers are “registered” with RP by their first-hop router

B.

It supports shared trees only assuming all hosts want the multicast traffic

C.

From the RP, traffic flows down a Source Tree to each receiver

D.

It does not support all underlying unicast routing protocols like BGP

E.

Receivers are “joined” to the Shared Tree (rooted the rp) by their local Designated Router (DR)

 

Correct Answer: E

 

 

QUESTION 117

Which two statements about RPF checksin Multicast Source Discovery Protocol (MSDP) are true? (Choose two)

 

A.

RPF check should be done against the route to the source of the corresponding PIM- SMdomain.

B.

Checking session advertisement (SA) messages causes messages looping.

C.

The RPF checkensures that there is a working redundancy for anycast RPs.

D.

RPF check should be done against the route to the RP of the PIM-SM domain that originated the SA.

E.

It prevents message looping, and session advertisement (SA) messages must be RPF checked.

 

Correct Answer: DE

Explanation:

SA Message Receipt

SA messages are only accepted from the MSDP RPF peer that is in the best path back toward the originator.

The same SA message arriving from other MSDP peers must be ignored or SA loops can occur.

Deterministically selectingthe MSDP RPF peer for an arriving SA message requires knowledge of the MSDP topology. However, MSDP does not distribute topology information in the form of routing updates. MSDP infers this information by using (M)BGP routing data as the best approximationof the MSDP topology for the SA RPF check mechanism. An MSDP topology, therefore, must follow the same general topology as the BGP peer topology. Besides a few exceptions (such as default MSDP peers and MSDP peers in MSDP mesh groups), MSDP peers, in general should also be (M)BGP peers.

 

Rule 1 of RPF checking in MSDP is applied when the sending MSDP peer is also an i(M)BGP peer. When Rule 1 is applied, the RPF check proceeds as follows:

The peer searches the BGP Multicast Routing Information Base (MRIB) for the best path to the RP that originated the SA message. If a path is not found in the MRIB, the peer then searches the Unicast Routing Information Base (URIB). If a path is still not found, the RPF check fails.

If the previous search succeeds (that is,the best path is found), the peer then determines the address of the BGP neighbor for this best path, which will be the address of the BGP neighbor that sent the peer the path in BGP update messages.

 

 

QUESTION 118

What type of IPv6 address is this address FF05::2:260:8FF:FE52:F9D8?

 

A.

multicast temporary node local

B.

multicast temporary site local

C.

unicast permanent link local

D.

multicast permanent node link local

E.

multicast permanent site local

F.

unicast temporary link local

 

Correct Answer: E

Explanation:

Permanent IPv6 Multicast addresses are assigned by IANA while the temporary IPv6 Multicast addresses can be used in pre-deployment Multicast testing. The Flag field may contain one of two possible values, as illustrated and described in the Table below:

 

Type of Multicast Address Binary Representation Hexadecimal Value

Permanent 0000 0

Temporary 0001 1

 

Multicast scope

The scope field indicates the scope of the IPv6 internetwork for which the multicast traffic is intended. The size of this field is 4 bits. In addition to information provided by multicast routing protocols, routers use multicast scope to determine whether multicast traffic can be forwarded. For multicast addresses there are 14 possible scopes (some are still unassigned), ranging from interface-local to global (including both link-local and sitelocal). The following table lists the defined values for the scope field:

 

Table 3. Multicast scope field values

Value Scope

0 Reserved

1 Interface-local scope (same node)

2 Link-local scope (same link)

3Subnet-local scope

4 Admin-local scope

5 Site-local scope (same site)

8 Organization-local scope

E Global scope

F Reserved

All other scope field values are currently undefined.

For example, traffic with the multicast address of FF02::2 has a link-local scope. An IPv6 router never forwards this type of traffic beyond the local link.

 

 

QUESTION 119

In PIM-SM operations, the first router connected to the multicast source sends the Register message to which device?

 

A.

Designated Router (DR)

B.

Multicastsource

C.

Multicast receiver

D.

RP mapping agent

E.

RP

 

Correct Answer: E

Explanation:

A multicast data sender just starts sending data destined for a multicast group. The sender’s local router (DR) takes those data packets, unicast-encapsulates them, and sends them directlyto the RP. The RP receives these encapsulated data packets, decapsulates them, and forwards them onto the shared tree. The packets then follow the (*,G) multicast tree state in the routers on the RP Tree, being replicated wherever the RP Tree branches, andeventually reaching all the receivers for that multicast group. The process of encapsulating data packets to the RP is called registering, and the encapsulation packets are known as PIM Register packets.

 

 

QUESTION 120

Which three statements about bidirectional PIM are true? (Choose three)

 

A.

Traffic for a bidirectional group flows along the one shared tree and simultaneously utilizes multiple paths in a redundant network topology.

B.

It does not require any traffic signaling in the protocol

C.

Membership to a bidirectional group is signaled using explicit Join messages.

D.

It maintains source-specific forwarding state.

E.

It reduces memory, bandwidth, and CPU requirements

 

Correct Answer: BCE

Explanation:

Reference

http://www.cisco.com/en/US/docs/ios/12_1t/12_1t2/feature/guide/dtbipim.html

 

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