[Free] Download New Latest (June 2016) Cisco 400-201 Practice Test 231-240

Ensurepass

QUESTION 231

Which statements about the Route Target Rewrite feature are not true? (Choose two.)

 

A.

After the route target replacement policy is applied to the target router, the BGP session need not be refreshed manually to put the policy into operation.

B.

Route Target Rewrite allows the administration of the routing policy to stay local to the AS.

C.

Route target replacement is always done by the ASBR.

D.

Route target rewrites are supported for VRF export maps.

E.

Route target replacement can be done on incoming and outgoing BGP updates.

 

Correct Answer: AC

Explanation:

The MPLS VPN–Route Target Rewrite feature allows the replacement of route targets on incoming and outgoing Border Gateway Protocol (BGP) updates. Typically, Autonomous System Border Routers (ASBRs) perform the replacement of route targets at autonomous system boundaries. Route Reflectors (RRs) and provider edge (PE) routers can also perform route target replacement.

The main advantage of the MPLS VPN – Route Target Rewrite feature is that it keeps the administration of routing policy local to the autonomous system.

 

 

QUESTION 232

Which three things are the building blocks of the Cisco VPLS architecture? (Choose three)

 

A.

VLAN Trunk Protocol (VTP)

B.

State Synchronization Protocol (SSP)

C.

L2VPN

D.

Ethernet Virtual Switch Interface (VSI)

E.

Label Distribution Protocol (LDP)

 

Correct Answer: CDE

 

 

QUESTION 233

Which statement about VPLS is true?

 

A.

All CE devices emulate a bridge

B.

All provider devices emulate a bridge

C.

Hierarchical VPLS reduces signaling overhead

D.

Each PE device emulates a bridge

E.

Each CE device emulates a bridge

 

Correct Answer: C

Explanation:

A hierarchical model can be used to improve the scalability characteristics of VPLS. Hierarchical VPLS (HVPLS) reduces signaling overhead and packet replication requirements for the provider edge.

 

 

QUESTION 234

When you design QoS on CE for an MPLS Layer 2 VPN, which three things should be considered? (Choose three.)

 

A.

Layer 2 access link QoS design

B.

enterprise-to-service-provider mapping models

C.

Layer 3 link access QoS design

D.

service provider service level agreements

E.

Layer 2 link access load balancing

 

Correct Answer: ABD

 

 

QUESTION 235

With VPLS, which protocol is used for label exchange and PW signalling?

 

A.

MP-BGP

B.

LDP

C.

BGP

D.

MTP

E.

Directed LDP

F.

IGP

 

Correct Answer: E

Explanation:

Using a directed LDP session, each provider edge advertises a virtual circuit label mapping that is used as part of the label stack imposed on the Ethernet frames by the ingress provider edge during packet forwarding.

 

 

QUESTION 236

Which three attribute-value pairs (AVPs) must be present in L2TPv3 ICRQ messages? (Choose three.)

 

A.

PW capabilities list

B.

Message type

C.

Assigned control connection ID

D.

PW type

E.

Remote session ID

F.

Hostname

 

Correct Answer: BDE

Explanation:

The ICRQ can
include information such as pseudowire type, required Layer 2specific sublayer, and circuit status.

 

The following AVPs MUST be present in the ICRQ:

Message Type

Local Session ID

Remote Session ID

Serial Number

Pseudowire Type

Remote End ID

Circuit Status

Services

 

 

QUESTION 237

Which two features must be configured to perform AToM NSF? (Choose two)

 

A.

FRR

B.

SSO

C.

distribute CEF

D.

switch virtual path

E.

graceful restart

 

Correct Answer: BE

Explanation:

Before you configure AToM NSF, you need to configure MPLS LDP Graceful Restart. MPLS LDP GR is enabled globally. When you enable LDP GR, it has no effect on existing LDP sessions. LDP GR is enabled for new sessions that are established after the feature has been globally enabled.

 

How AToM NSF Works

AToM NSF improves the availability of the network of the service provider that uses AToM to provide Layer 2 VPN services. HA provides the ability to detect failures and handle them with minimal disruption to the service being provided. AToM NSF is achieved by SSO and NSF mechanisms. A standby RP provides control-plane redundancy. The control plane state and data plane provisioning information for the attachment circuits (ACs) and AToM pseudowires (PWs) are checkpointed to the standby RP to provide NSF for AToM L2VPNs.

 

 

QUESTION 238

When an MPLS Layer 2 VPN runs in the hub-and-spoke model, where is QoS implemented?

 

A.

hub and spoke

B.

PE

C.

CE

D.

hub

E.

spoke

 

Correct Answer: D

 

 

 

 

 

 

QUESTION 239

Which three configuration options are available for configuring the l2tp-class command in L2TPv3? (Choose three)

 

A.

TCP port

B.

authentication

C.

IP DF bit

D.

retransmit retries

E.

sequencing

F.

hostname

 

Correct Answer: BDF

Explanation:

On Cisco 7200, l2tp-class options available are:

R1(config-l2tp-class)#?

l2tp-class configuration commands:

accounting Method list to use for tunnel accounting authentication Authenticate the L2TP control connection cookie Local cookie options default Set a command to its defaults digest Message Digest Authentication for the L2TP control connection exit Exit from l2tp-class configuration mode hello Set HELLO message interval hidden Hide AVPs in outgoing control messages hostname Local hostname for control connection authentication no Negate a command or set its defaults password Password for control connection authentication, AVP hiding receive-window Receive window size for the control connection retransmit Control message retransmission parameters timeout Control connection timeout parameters

R1(config-l2tp-class)#retransmit ?

initial SCCRQ message retries/timeout settings

retries Number of retries before tearing down a control connection timeout Control packet retransmission

timeout parameters

R1#sh run | be l2tp-class

l2tp-class test

authentication

hostname TESTNODE

retransmit retries 5

 

 

QUESTION 240

Which two Any Transport over MPLS (AToM) traffic encapsulations require the use of a control word? (Choose two)

 

A.

HDLC

B.

ATM AAL5

C.

PPP

D.

Ethernet VLAN

E.

Frame Relay

 

Correct Answer: BE

Explanation:

AToM Header

The AToM header is 4 bytes (control word). The control word is optional for Ethernet, PPP, HDLC, and cell relay transport types. However, the control word is required for Frame Relay, and ATM
AAL5 transport types.

 

Free VCE & PDF File for Cisco 400-201 Real Exam

Instant Access to Free VCE Files: CCNA | CCNP | CCIE …
Instant Access to Free PDF Files: CCNA | CCNP | CCIE …

Comments are closed.