Download New Updated (Spring 2015) Cisco 350-029 Actual Tests 151-160

By | April 26, 2015

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QUESTION 151

What are three common reasons for ATM CRC errors? (Choose three.)

 

A.

Incorrect VPI and VCI configuration

B.

Noise, gain hits, or other transmission problems on the data link equipment

C.

ATM cells are dropped due to incorrect ATM routing in the service provider.

D.

A faulty or failing ATM interface.

E.

Cells are dropped due to traffic policing in the ATM cloud on one or more virtual circuits attached to the ATM interface.

 

Correct Answer: BDE

Explanation:

Reasons for ATM CRC Errors

The following are some potential reasons for ATMCRC errors:

Dropped cells due to traffic policing in the ATM cloud on one or more VCs attached to the ATM interface.

Noise, gain hits, or other transmission problems on the data-link equipment.

A faulty or failing ATM interface.

The show interfaces commandoutput displays the CRC error count. These errors suggest that when the SAR reassembles the packet and checks the CRC, the calculated CRC value does not match the value in the assembled packet’s CRC field.

 

 

QUESTION 152

Select the three best answers which best describe Private Network-to Network Interface (PNNI) in an ATM network (Choose three.)

 

A.

It is the Routing protocol used between ATM switches

B.

PNNI uses the same Dijsktra algorithm for SPF calculation

C.

PNNI and OSPF use the same Database tomake cohesive decision for packet forwarding

D.

PNNI measures line capacities and delays in addition to simple cost metrics

 

Correct Answer: ABD

Explanation:

The Private Network-to-Network Interface (PNNI) is a link-state routing protocol used in ATM networks. PNNI is similar to the open shortest path first (OSPF) used for IP routing. PNNI is a suite of network protocols that can be used to discover an ATM network topology, create a database of topology information, and route calls over the discovered topology. PNNI is alink-state routing protocol, which means that the protocol collects information about the currentstate of links and nodes in the network to build a network database. The PNNI network database can be used to determine the network structure and the currentstate of network components. To build the PNNI network database, each PNNI node must receive topology information from all the other devices in the network. To keep the database current, the node must receive regular updates from other nodes.

 

 

QUESTION 153

What is the label for MPLS over ATM?

 

A.

VPI 16

B.

DLCI

C.

VPI and VCI

D.

circuit number

E.

PVC and SVC

 

Correct Answer: C

 

 

QUESTION 154

What is used as label in cell-based MPLS?

 

A.

VPI and VCI

B.

None of above

C.

VCI

D.

Specific 4 bytes label

E.

VPI

 

Correct Answer: A

 

 

 

QUESTION 155

When should traffic shaping be implemented on Frame Relay PVCs? (Choose two)

 

A.

When you want to drop excess traffic above the CIR

B.

When there is a speed mismatch between the central site and the remote site.

C.

When using Frame Relay SVCs

D.

When over-subscribing the central site link

E.

When LLQ is implemented on the Frame Relay PVC.

F.

When Multilink PPP LFI is implemented on the Frame Relay PVC.

 

Correct Answer: BD

 

 

QUESTION 156

Which statement about Frame Relay is not true?

 

A.

Static mapping is used when the remote router does not support Inverse ARP.

B.

Frame Relay Inverse ARP requires LMI capability to construct an address to the DLCI mapping table on the router.

C.

Frame Relay Inverse ARP is disabled by default in CiscoIOS Software for all protocols that are enabled on the physical interface.

D.

Inverse ARP does not work when LMI is disabled.

E.

Frame Relay provides forward and backward congestion notification messages.

 

Correct Answer: C

 

 

QUESTION 157

Which three are optional extensions of the Frame Relay Local Management Interface specification? (Choose three)

 

A.

Switched virtual circuit

B.

Virtual circuit status

C.

Simple flow control

D.

Multicasting

E.

Permanent virtual circuit

 

Correct Answer: BCD

Explanation:

< font face="Arial">Optional LMI Extensions

The LMI specification also defines several optional extensions:

 

* Global addressing convention

* Multicast capability

* A simple flow control mechanism

* Ability for the network to communicate a PVC’s CIR to the subscriber in a Status message

* A new message type that allows the network to announce PVC status changes without prompting from the subscriber

 

Implementors may build any, all, or none of these features into their networks.

 

 

 

QUESTION 158

Select the three valid LMI extension:

 

A.

Multicasting

B.

Global addressing

C.

Forward-explicit congestion notification (FECN)

D.

Virtual circuit status messages.

E.

Backward-explicit congestion notification (BECN)

 

Correct Answer: ABD

Explanation:

Optional LMI Extensions

The LMI specification also defines several optional extensions:

 

* Global addressing convention

* Multicast capability

* A simple flow control mechanism

* Ability for the network to communicate a PVC’s CIR to the subscriber in a Status message

* A new message type that allows the network to announce PVC statuschanges without prompting from the subscriber

 

Implementors may build any, all, or none of these features into their networks.

 

 

QUESTION 159

In the Cisco Resilient Ethernet Protocol (REP), how many ports are always blocking?

 

A.

zero

B.

at least one

C.

at least two

D.

at least four

E.

at least three

 

Correct Answer: B

Explanation:

http://www.cisco.com/en/US/prod/collateral/switches/ps6568/ps6580/prod_white_paper090 0aecd8 06ec6fa.pdf

Cisco REP Operation

With REP at least one port is always blocked in any given segment, that is, the alternate port.

 

 

QUESTION 160

Which four statements about Ethernet virtual circuit (EVC) infrastructure are true? (Choose four.)

 

A.

EVC infrastructure is a Layer 3 platform-independent routing architecture that supports IP over Ethernet services.

B.

Ethernet flow point (EFP) is configured on the maininterface.

C.

Feature commands like MQC-based QoS policies can be specified.

D.

EVC infrastructure is a Layer 2 platform-independent bridging architecture that supports Ethernet services.

E.

Each Ethernet flow point (EFP) matches a predefined VLAN tag-based criteria.

F.

Ethernet flow point (EFP) is configured on the VLAN interface.

 

Correct Answer: BCDE

Explanation:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SY/configuration/guide /ethernet_virtual_connection.html#wp1050309

http://www.cisco.com/en/US/docs/switches/metro/me3600x

 

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