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Which WAN protocol is used for out-of-band signaling?（）

题目
单选题
Which WAN protocol is used for out-of-band signaling?（）
A

NCP

B

HDLC

C

LAPB

D

LAPD

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相似问题和答案

第1题：

Which WAN protocol is used for out－of－band signaling?()

A.NCP

B.HDLC

C.LAPB

D.LAPD


参考答案：D

第2题：

Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?()

A. ISDN

B. Frame Relay

C. ATM

D. FDDI


参考答案：A

第3题：

Which two signaling protocols could be used in VPLS to advertise site information between PEs? ()

A. IKE

B. BGP

C. RSVP

D. LDP


参考答案：B, D

第4题：

Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?（）

  • A、ISDN
  • B、Frame Relay
  • C、ATM
  • D、FDDI

正确答案:A

第5题：

Which two characteristics apply to a CAS T1 interface?（）

  • A、signaling travels in-band 
  • B、up to 24 voice channels 
  • C、up to 32 voice channels 
  • D、signaling travels in time slot 17 
  • E、uses Q.931 signaling protocol in a common channel

正确答案:A,B

第6题：

Which one of the WAN data－link protocols below is used for out－of－band signaling?()

A. HDLC

B. NCP

C. PAP

D. LAPD

E. LAPB

F. None of the above


参考答案：D

第7题：

Which logical channel is used to transfer signaling messages such as resource reallocation?()

A.PDTCH

B.PTCCH

C.PACCH

D.PBCCH


参考答案：C

第8题：

Which of the following devices is used to connect a WAN to a LAN?()

A.Basic router

B.Basic switch

C.Bridge

D.Repeater


参考答案：A

第9题：

When Cisco SDM is used to generate QoS policy， various QoS classes will be created and assigned a percentage of the interface bandwidth. Which three statements indicate the default bandwidth values that are assigned by SDM for outgoing traffic on a WAN interface？ （）

  • A、 Voice traffic will be assigned 47% of the interface bandwidth.
  • B、 Voice call signaling will be assigned 33% of the interface bandwidth.
  • C、 Telnet， SSH， and other traffic that is generated to manage the router is assigned 5% of the interface bandwidth.
  • D、 Best-effort traffic will be assigned 38% of the interface bandwidth.
  • E、 Routing protocol traffic will be assigned 5% of the interface bandwidth.
  • F、 Transactional traffic will be assigned 5% of the interface bandwidth.

正确答案:C,E,F

第10题：

Which protocol is used by multicast to prevent loops?（）

  • A、OSPF
  • B、RIP
  • C、RPF
  • D、BGP
  • E、EIGRP

正确答案:C

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