Download New Updated (June) Cisco 640-875 Practice Test 71-80

Ensurepass

 

QUESTION 71

Which two statements about Packet over SONET are true? (Choose two.)

 

A.

POS is a Layer 2 technology that uses PPP in ATM encapsulation and SONET framing.

B.

The Layer 2 frame is encapsulated into a generic HDLC header (not Cisco proprietary HDLC) and placed into the appropriate SONET Payload Envelope.

C.

The FCS field can be set to 16 bits on one end and 32 bits on the other end of a POS connection without causing any connectivity issues.

D.

The Cisco POS interface supports Cisco HDLC and PPP encapsulation.

E.

POS can be used in a point-to-point or point-to-multipoint environment.

 

Correct Answer: BD

QUESTION 72

DRAG DROP

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Correct Answer:

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QUESTION 73

Which component is integrated into the Cisco IPoDWDM interfaces?

 

A.

ROADM

B.

transponder

C.

electrical cross connect

D.

E-O-E converter

E.

SONET/SDH controller

 

Correct Answer: B

 

 

QUESTION 74

A Passive Optical Network is a point-to-multipoint FTTx network architecture that relies on which of the following?

 

A.

Electrically powered optical splitters

B.

Unpowered optical splitter

C.

Customer optical network terminal

D.

Network interface controller

 

Correct Answer: B

 

 

QUESTION 75

Which two commands can be used to enable LACP when configuring the interfaces for a 40 gigabit etherchannel? (Choose two.)

 

A.

switch (config-if)# channel-group 1 mode active

B.

switch (config-if)# channel-group 1 mode auto

C.

switch (config-if)# channel-group 1 mode desirable

D.

switch (config-if)# channel-group 1 mode passive

E.

switch (config-if)# channel-group 1 mode LACP

 

Correct Answer: AD

 

 

QUESTION 76

DRAG DROP

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Correct Answer:

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QUESTION 77

Refer to the exhibit. Based on the configurations shown, why is the serial link in up/down status?

 

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A.

Mismatch hostnames

B.

Passwords are in plain text

C.

Mismatch of authentication type

D.

Wrong configuration mode for command input

 

Correct Answer: C

 

 

QUESTION 78

Which feature is used to protect the control plane of the router?

 

A.

Port security

B.

uRPF

C.

Routing protocol authentication

D.

VRF

E.

SSH

F.

SSL

 

Correct Answer: C

 

QUESTION 79

Which statement about SSH is true?

 

A.

It is a TCP/IP transport layer protocol.

B.

It uses TCP port number 22.

C.

It securely encrypts Telnet.

D.

It uses UDP port 23.

E.

Passwords are sent in clear text.

F.

It is an OSI network layer protocol.

 

Correct Answer: B

 

 

QUESTION 80

Which two statements are correct regarding routing protocol authentication? (Choose two.)

 

A.

MD5 authentication can only be established between Internal BGP peers.

B.

Authentication can be established using keychains on one peer and MD5 hashing on the other.

C.

UDP port 179 is used for BGP session authentication.

D.

MD5 passwords are never sent to a peer.

E.

Routers authenticate each routing update packet received.

F.

BGP peers can be configured with different passwords.

 

Correct Answer: DE

 

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