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GB0-391 : Constructing Secure Optimized WANs V2.0 Exam

H3C GB0-391 Questions & Answers

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GB0-391


Constructing Secure Optimized WANs V2.0


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Question: 70


In ADSL of PPPoE applications, when the CPE side using MSR router + ADSL interface card for networking, CO.'S side DSLAM using ATM uplink time, deposit CPE needs to interface on the router which side ( irrespective CPE side LAN Connection ) ?


  1. DSL interface

  2. Yi Tai Ethernet port

  3. Virtual-Ethernet

  4. Virtual-Template

  5. dial number Interface


Answer: A,E Question: 71

In the PPPoE application of ADSL , when the CPE side uses the MSR router + ADSL interface card for networking, and the CO side DSLAM uses ATM for uplink, which interfaces need to be PPPoE- related on the CO side centralized router ( PPPoE Server ) Configuration ?


  1. ATM interface

  2. Yi Tai Ethernet port

  3. Virtual-Ethernet

  4. Virtual-Template

  5. dial number Interface


Answer: A,C,D Question: 72

In ADSL of PPPoE applications, when the CPE side using MSR router + ADSL interface card for networking, co side DSLAM make use IP rows on the co centralized router side ( PPPoE Server ) need to be on which interfaces PPPoE relevant The configuration ?


  1. ATM interface

  2. Yi Tai Ethernet port

  3. Virlual-Ethernet

  4. Virtual-Template

  5. dial number Interface


Answer: A,B,D Question: 73

The frequency band used to transmit data in ADSL2+ is .


  1. 20KHz ïœ 1MHz

  2. 0 ïœ 4 KHz

  3. 1.1MHz ïœ 2_2MHz

  4. 20KHz ïœ 2.2MHz

  5. High in 10MHZ


Answer: D Question: 74

Among the following ADSL standards, the one that does not need to use a splitter is .( Choose one or more )


  1. ITU 992.1

  2. ITU 992.2

  3. ITU 992.3

  4. ITU 992.4


Answer: A,B,D Question: 75

An operator hopes to deploy ADSL ( ADSL2 ) to kill the system in a community with relatively dense users and short transmission distance .Users do not require high bandwidth, and pay more attention to its economy and ease of installation and maintenance.


Based on the above requirements, when choosing ADSL ( ADSL2 ) standard, the ideal is .( Choose one or more )


  1. ITU 992.1

  2. ITU 992.2

  3. ITU 992.3

  4. ITU 992.4


Answer: A,B,D Question: 76

The theoretical transmission rate of ADSL data is related to which of the following options ?


  1. Line Road activate consultations

  2. Number of sub- carrier channels

  3. modulation system rate

  4. Sub- carrier channel rate


Answer: A,B,C,D Question: 77

The VPI/VCI parameters of ADSL connection are negotiated and determined in .


  1. Line Road activate

  2. DMT modulation

  3. Jian Li low-level link VCC

  4. PPPoE negotiation

Answer: C Question: 78

Common VPI/VCI values ââ in ADSL applications include .( Choose one or more )


A. 0/30 B. 0/35 C. 0/32 D. 0/16


Answer: A,B,C Question: 79

Which of the following statements about the improvement of ADSL2 relative to ADSL is correct: ( Choose one or more )


  1. The frequency band of ADSL2 is twice that of ADSL

  2. At the same transmission rate, ADSL2 can transmit longer distances than ADSL

  3. Compared with ADSL, ADSL2 adds a new operating mode

  4. ADSL can support flexible bandwidth binding function, such as IMA ( Inverse Multiplexing forATM , ATM inverse multiplexing )


Answer: A,B,C,D Question: 80

Among the following VPN technologies, those belonging to the third layer VPN are .( Choose one or more )


  1. L2TP VPN

  2. BGP/MPLS VPN

  3. VLL

  4. IPSec VPN


Answer: A,B,D


Explanation:


Three layers: IPSEC , GRE , MPLS VPN


Question: 81


The following VPN technology, belonging to the second layer of VPN are .( Choose one or more )


  1. VPLS

  2. VLL

  3. GRE VPN

  4. IPSec VPN

Answer: A,B Question: 82

Which of the following VPN technologies are suitable for enterprise employees to remotely access the enterprise private network through the Internet ? ( Choose one or more )


  1. SSL VPN

  2. L2TP VPN

  3. GRE VPN

  4. BGP/MPLS VPN


Answer: A,B Question: 83

Which of the following VPN technologies are suitable for corporate employees on business trips to remotely access the corporate network through the Internet ?


  1. BGP/MPLS VPN

  2. GRE VPN

  3. SSL VPN

  4. VLL


Answer: C Question: 84

The incorrect description of L2TP VPN and GREVPN is .( Choose one or more )


  1. all point to point VPN

  2. Both support tunnel verification

  3. Both support dynamic address acquisition

  4. are based on UDP encapsulation


Answer: A,C,D Question: 85

About L2TP VPN and GRE VPN are correct is .( Choose one or more )


  1. all point to point VPN

  2. Both support tunnel verification

  3. All belong to L3 VPN ( Laer 3 VPN , Layer 3 VPN ) technology

  4. are based lP package


Answer: B Question: 86

Which description is correct about L2TP VPN and SSL VPN?

  1. All need to install and maintain the client

  2. Both support Web access

  3. All support lP access mode

  4. are based on UDP encapsulation


Answer: C


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