Download New Updated (July) Cisco 400-101 Actual Test 111-120

Ensurepass

QUESTION 111

In which 802.1D port state are the root bridge, the root port, and the designated port(s) elected?

 

A.

Listening

B.

learning

C.

forwarding

D.

blocking

E.

disabled

 

Correct Answer: A

Explanation:

STP switch port states:

Reference: http://en.wikipedia.org/wiki/Spanning_Tree_Protocol

 

 

QUESTION 112

In a network where a Layer 2 switch interconnects several routers, which feature restricts multicast packets for each IP multicast group to only those mulicast router ports that have downstream receivers joined to that group?

 

A.

PIM snooping

B.

IGMP snooping

C.

IGMP filter

D.

IGMP proxy

 

Correct Answer: A

Explanation:

In networks where a Layer 2 switch interconnects several routers, such as an Internet exchange point (IXP), the switch floods IP multicast packets on all multicast router ports by default, even if there are no multicast receivers downstream. With PIM snooping enabled, the switch restricts multicast packets for each IP multicast group to only those multicast router ports that have downstream receivers joined to that group. When you enable PIM snooping, the switch learns which multicast router ports need to receive the multicast traffic within a specific VLAN by listening to the PIM hello messages, PIM join and prune messages, and bidirectional PIM designated forwarder-election messages

Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snooppim.html

 

 

QUESTION 113

Which three statements about Cisco HDLC are true? (Choose three.)

 

A.

HDLC serial encapsulation provides asynchronous framing and error detection.

B.

Serial link keepalives are maintained by SLARP.

C.

HDLC serial encapsulation provides synchronous framing without retransmission.

D.

HDLC frame size can be reduced with MPPC compression.

E.

The interface is brought down after five ignored keepalives.

F.

The interface is brought down after three ignored keepalives.

 

Correct Answer: BCF

Explanation:

Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links using HDLC. Cisco HDLC also provides a simple control protocol called Serial Line Address Resolution Protocol (SLARP) to maintain serial link keepalives. For each encapsulation type, a certain number of keepalives ignored by a peer triggers the serial interface to transition to the down state. For HDLC encapsulation, three ignored keepalives causes the interface to be brought down.

By default, synchronous serial lines use the High-Level Data Link Control (HDLC) serial encapsulation method, which provides the synchronous framing and error detection functions of HDLC without windowing or retransmission.

Reference: http://www.cisco.com/c/en/us/td/docs/routers/access/800/819/software/configuration/Guide/819_SCG/6ser_conf.html#78662

 

 

QUESTION 114

Which two fields reside in the initial CHAP challenge packet? (Choose two.)

 

A.

the authentication name of the challenger

B.

a random hash value generated by the device

C.

the hashed packet type ID

D.

the packet type ID in clear text

 

Correct Answer: AD

Explanation:

When a caller A dials in to an access server B, The Access server sends across the link an initial Type 1 authentication packet called a Challenge. This Challenge packet contains a randomly generated number, an ID sequence number to identify the challenge (sent in clear text) and the authentication name of the challenger.

Reference: http://www.rhyshaden.com/ppp.htm

 

 

QUESTION 115

Which statement about WAN Ethernet Services is true?

 

A.

Rate-limiting can be configured per EVC.

B.

Point-to-point processing and encapsulation are performed on the customer network.

C.

Ethernet multipoint services function as a multipoint-to-multipoint VLAN-based connection.

D.

UNIs can perform service multiplexing and all-in-one bundling.

 

Correct Answer: A

Explanation:

The MEF has defined a set of bandwidth profiles that can be applied at the UNI or to an EVC. A bandwidth profile is a limit on the rate at which Ethernet frames can traverse the UNI or the EVC. Reference: http://www.ciscopress.com/articles/article.asp?p=101367&seqNum=2

 

 

QUESTION 116

DRAG DROP

Drag and drop each STP port role on the left to the matching statement on the right.

 

clip_image002

 

Correct Answer:

clip_image004

 

 

 

QUESTION 117

DRAG DROP

Drag and drop the VLAN number on the left to the corresponding default VLAN name on the right.

 

clip_image005

 

Correct Answer:

clip_image006

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 118

DRAG DROP

Drag and drop the StackWise stack master election rule on the left into the correct priority order on the right.

 

clip_image007

 

Correct Answer:

clip_image008

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 119

DRAG DROP

Drag and drop the IGMPv2 timer on the left to its default value on the right.

 

clip_image009

 

Correct Answer:

clip_image010

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 120

DRAG DROP

Drag and drop the Metro Ethernet circuit on the left to the corresponding Service Type category on the right.

 

clip_image012

 

Correct Answer:

clip_image014

 

 

Free VCE & PDF File for Cisco 400-101 Real Exam

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