[Free] Download New Latest (November) Cisco 400-201 Actual Tests 141-150

Ensurepass

QUESTION 141

What is the statistical reserve?

 

A.

Bandwidth that is reserved for SVCs to route over a trunk

B.

Bandwidth that is reserved on a trunk so that ABR connections can burst

C.

Bandwidth on a trunk that is reserved for control traffic and cannot be used by connections

D.

Bandwidth that cannot be allocated to connections but can be used to accommodate statistical variations in the traffic

 

Correct Answer: D

 

 

QUESTION 142

Which statement about ATM AAL5 over MPLS is true?

 

A.

It supports ATM signaling.

B.

It supports traffic shaping of packets in MPLS to the ATM path.

C.

It supports ATM switched virtual circuits

D.

It supports fragmentation and reassembly.

E.

It supports AAL5 SDU switching.

 

Correct Answer: E

Explanation:

Reference:

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/fsaal22.html#wp1015337 Restrictions

The following restriction apply to AAL5 over MPLS:

The AAL5 over MPLS feature supports only AAL5 SDU switching.

The following services are not supported with the AAL5 over MPLS feature:  ATM switched virtual circuits (SVCs)  ATM signaling  Fragmentation and reassembly  Traffic shaping of packets in the MPLS-to-ATM path

The instructions for configuring AAL5 over MPLS in this feature module apply only to the Cisco 12000 series router for 12.0(21)ST. Avoid using these instructions for any other platform or release.

 

 

QUESTION 143

Which three of these are types of Ethernet Virtual Connections (EVCs) in the MEF concept? (Choose three)

 

A.

rooted multipoint EVC (E-Tree)

B.

point-to-point EVC (E-Line)

C.

point-to-multipoint EVC (E-Tree)

D.

hub spoke EVC (E-Tree)

E.

multipoint-to-multipoint EVC (E-LAN)

 

Correct Answer: ABE

Explanation:

MEF Service

Ethernet Service Types can be used to create a broad range of Subscriber services. The service types are characterized by their required connectivity [10]. The following service types have been defined to date:

Ethernet Line Service (E-Line Service) uses a Point-to-Point EVC. The Ethernet LAN Service (E-LAN Service) uses a Multipoint-to-Multipoint EVC. The Ethernet Tree Service (E-TREE Service) uses a Rooted-Multipoint EVC.

 

 

QUESTION 144

Which two statements best describe EtherChannel? (Choose two).

 

A.

EtherChannel technology helps aggregate traffic grouping multiple, full-duplex point-to- point links together.

B.

EtherChannel technology is based on the 802.1 IEEE stand.

C.

EtherChannel can aggregate up to 800 Mbps,8 Gbps,or 80Gbps of aggregate bandwidth for a Fast EtherChannel, Gigabit EtherChannel,or 10 Gigabit EtherChannel connection respectively.

D.

EtherChannel is defined for Rapid Spanning Tree for faster convergence.

 

Correct Answer: AC

 

 

QUESTION 145

What does UDLD stand for?

 

A.

UniDirectional Loop Detection

B.

Unspecified Distribution Label Detection

C.

Unified Distribution Label Direction

D.

UniDirectional Link Detection

 

Correct Answer: D

 

 

 

 

 

 

 

QUESTION 146

The layer 2 protocol used by POS technology offers a standardized way for mapping IP packets into SONET/ SDH payloads. Select the correct sequence of POS operation:

 

1) Data is scrambled and synchronous mapping takes place by octet into the SONET/SDH frame.

2) Encapsulated via Point-to-Point Protocol (PPP) takes place framing information is added with High-level Data Link Control (HDLC).

3) Gaps between frames are filled with flags, set to value 7E.

4
) Octet stuffing occurs if any flags or resultant escape characters (of value 7D) are found in the data.

5) Data is segmented into an IP datagram with its 20-byte IP header.

 

A.

1, 3, 4, 5, 2

B.

5, 2, 3, 1, 4

C.

2, 3, 5, 4, 1

D.

5, 2, 3, 4, 1

E.

1, 2, 3, 4, 5

 

Correct Answer: D

Explanation:

The proper order of operation of PoS is:

When transmitting:

IP -> PPP -> FCS generation -> Byte stuffing -> Scrambling -> SONET/SDH framing When receiving:

SONET/SDH framing -> Descrambling -> Byte destuffing -> FCS detection -> PPP -> IP Remote

 

 

QUESTION 147

Refer to the exhibit. Which two configurations are shown? (Choose two)

 

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A.

L2TP tunnel configuration

B.

GRE tunnel configuration

C.

IPsec tunnel configuration

D.

tunnel keepalive mechanism configuration

 

Correct Answer: BD

 

 

QUESTION 148

Which statement about the Link Control Protocol (LCP) is true?

 

A.

LCP is used for basic PPP link setup and operation.

B.

LCP is used for PPP CHAP authentication.

C.

LCP is used for PPP over ATM (PPPoA) setup.

D.

LCP is used for PPP over Ethernet (PPPoE) setup.

E.

LCP is used for PPP over Frame Relay (PPPoFR) setup.

 

Correct Answer: A

Explanation:

The LCP protocol:

Checks the identity of the linked device and either accepts or rejects the device determines the acceptable packet size for transmission searches for errors in configuration can terminate the link if requirements exceed the parameters.

 

 

QUESTION 149

What does the protocol field inside the PPP frame indicate?

 

A.

the protocol used to determine the authentication method

B.

the protocol used to identify the data in the Information field

C.

the protocol used to carry the PPP frame

D.

the protocol used to decode the FCS field

E.

the protocol used to detect the number of padding bytes

 

Correct Answer: B

Explanation:

The Protocol field indicates the type of payload packet (e.g. LCP, NCP, IP, IPX, AppleTalk, etc.).

The Information field contains the PPP payload; it has a variable length with a negotiated maximum called the Maximum Transmission Unit. By default, the maximum is 1500 octets. It might be padded on transmission; if the information for a particular protocol can be padded, that protocol must allow information to be distinguished from padding.

 

 

QUESTION 150

Which three are advantages of SONET? (Choose three)

 

A.

Allows the transportation of all forms of traffic

B.

Multiplexing is easy

C.

Clocks do not need to be synchronized

D.

Reduces network complexity and cost

E.

Padding is not necessary and not permitted

 

Correct Answer: ABD

Explanation:

SONET Advantages

The big advantage of SONET is that it was designed to provide the following functions needed in networking at that time:

Single-step multiplexing

Access to low-level signals directly

Carry existing DS1, DS3, ATM, and packet traffic

Synchronous timing to eliminate bit stuffing

Overhead room for acc
eptable network management information Allow transmission of data at higher speeds (50 Mbps+)

 

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