Latest Nov 01, 2021 Real GB0-391 Exam Dumps Questions Valid GB0-391 Dumps PDF
H3C GB0-391 Exam Dumps - PDF Questions and Testing Engine
NEW QUESTION 201
A VoIP network is interconnected with a PSTN network and adopts the H.323 protocol.It is required that in addition to normal voice calls, it must also be able to conduct telephone conferences with more than three rooms.The VoIP network must include H.323 components including
- A. MCU
- B. terminating end
- C. network gatekeeper
- D. net off
Answer: A,B,D
NEW QUESTION 202
use IKE is IPSec provides auto-negotiation key exchange and create SA during the service, in the IKE defines which of the second phase of consultation kinds of IKE exchange mode ?
- A. Fast speed mode ( New Group Mode )
- B. Wild Man mode ( Aggressive Mode )
- C. channel information exchange mode ( Informational the Exchange Mode )
- D. Main Mode ( the Main Mode )
Answer: A
NEW QUESTION 203
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 ) ?
- A. Virtual-Template
- B. dial number Interface
- C. DSL interface
- D. Yi Tai Ethernet port
- E. Virtual-Ethernet
Answer: B,C
NEW QUESTION 204
Which of the following is correct about the encryption algorithm?
- A. to safety, said encryption algorithm depends entirely on the security of the key itself
- B. for said encryption algorithm efficiency higher
- C. of said encryption algorithm is suitable for a large amount of data transfer environment
- D. for encryption algorithm called AES , 3DES , DES , etc.
Answer: B,C,D
NEW QUESTION 205
In FIG illustrated EPON networking, the OLT to the network all the ONU ( the ONU1 to ONUn ) to transmit data, the following statements is correct is ____ .( Choose one or more )
- A. Line Road 0 ~ n- downlink data is the same
- B. Line Road 0 have all the ONU data
- C. Line Road 1 on which all the ONU data
- D. wire passage 2 is only to ONU2 data
Answer: A,B,C
NEW QUESTION 206
The three routers are shown in the figure .A GRE tunnel is created between Routerl and RouLer3 .The configuration commands for the three routers are :
Routerl:
[Router1]interface Serial 0/2/0
[Router1-Serial0/2/0]ip address 10.1.1.1 24
ERouter1]interface loopback 0
[Router1-LoopBack0]ip addre ss 1.1.1.1 32
[Router1]interface Tunnel 0
[Router1-Tunnel0]source 10.1.1.1
[Router1-Tunnel0]destination 20.1.1.2
[Routerl-Tunnel0]ip address 100.1.1.1 24
[Router1]ospf
IRouter1-ospf-1]area 0
IRouter1-ospf-1-area-0.0.0.0]network 10.1.1.1 0.0.0.255
[Router1]ip route-static 3.3.3.3 32 100.1.1.2
Router2:
[Router2]interface Serial 0/2/0
[Router2-Serial0/2/0]ip address 10.1.1.2 24
[Router2]interface Serial 0/2/1
[Router2-Serial0/2/0]ip address 20.1.1.1 24
[Router2]ospf
IRouter1-ospf-1]area 0
IRouter1-ospf-1-area-0.0.0.0]network 10.1.1.2 0.0.0.255
IRouter1-ospf-1-area-0.0.0.0]network 20.1.1.1 0.0.0.255
Router3:
[Router3]interface Serial 0/2/0
[Router3-Serial0/2/0]ip address 20.1.1.2 24
[Router3]interface loopback 0
[Router3-LoopBack0]ip address 3.3.3.3 32
[Router3]interface Tunnel 0
[Router3-Tunnel0]source 20.1.1.2
[Router3-Tunnel0]destination 1 0.1.1.1
[Router3-Tunnel0]ip address 100.1.1.2
[Router3]ospf
[Router3-ospf-l]area 0
[Router3-ospf-l-area-0.0.0.0] network 20.1.1.2 0.0.0.255
[Router3]ip route-static l.1.1.1 32 100.1.1.1
Use the command ping-a 1.1.1.1 3.3.3.3 on Router 1 to check the connectivity, and 100% receive ICMP reply packets.
In the above process, the following description of the various routers to process packets of data, is correct ____ .( Choose one or more )
- A. Router3 performs GRE encapsulation of ICMP Echo Reply packets
- B. Router2 performs lP packet forwarding
- C. Router 1 performs GRE encapsulation of ICMP Echo Request packets
- D. Router2 performs GRE decapsulation of ICMP Echo Request packets
Answer: A,B,C
NEW QUESTION 207
There are ___ methods for user access authentication and authorization .
- A. CA certification and authorization
- B. RADIUS authentication and authorization
- C. HWTACAC authentication and authorization
- D. This authenticated authorization
Answer: A,B,C,D
NEW QUESTION 208
The information displayed on the MSR router is as follows:
Sstem Defined Behavior Information:
Behavior: ef
Expedited Forwarding:
Bandwidth 20 (% ) Cbs-ratio 25
Behavior: af
Assured Forwarding:
Bandwidth 20 (%)
Discard Method: Tail
Behavior: be
-none-
Then the following statement is incorrect is _____
- A. explicit information indicating the behavior of a user-defined
- B. which is defined in the EF queue and AF queues, bandwidth is reserved bandwidth occupied respectively 20%
- C. use can change the percentage of the bandwidth occupied by the queue user behavior
- D. significant information is shown the behavior of the system defined
Answer: A,C
NEW QUESTION 209
Regarding the echo in the VoIP telephone system, which of the following descriptions are correct ?
- A. In VoIP networks, echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.
- B. speech voice gateway device when performing analog to digital conversion may introduce echo, an echo suppression function but can be configured to reduce the impact on the voice gateway.
- C. back sound into electrical echo and acoustic echo, electrical echo conventional telephone systems is mainly due to two, four-wire transducer impedance mismatch caused by
- D. language voice gateway equipment itself does not bring new echo, but the IP network to bring network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network The echo of being felt.
Answer: C,D
NEW QUESTION 210
A secure network must meet the conditions of ______ .
- A. There is an adequate security system when connecting to the internet
- B. Have sufficient encryption and anti-counterfeiting means when transmitting data on the internet
- C. entire network has a sound management system
- D. determined users within the network access security and legal security
Answer: A,B,C,D
NEW QUESTION 211
Among the following DSL technologies, the highest transmission rate is
- A. HDSL
- B. VDSL
- C. ADSL2+
- D. ADSL
- E. SHDSL
Answer: B
NEW QUESTION 212
The frequency range of the baseband data signal used by common EoC technology is generally ____
- A. 110MHz~ 1000 MHz
- B. 5 ～ 65Mhz
- C. 0 ～ 30MHz
- D. 87MHz ～ 108MHz
Answer: C
NEW QUESTION 213
In the VoIP network, which of the following factors has nothing to do with the bandwidth saved by VAD technology ?
- A. selected by signaling type
- B. mesh network congestion degree
- C. selected encoding type used
- D. said language and characteristics of the speaker
Answer: A,B
NEW QUESTION 214
Which of the following statements about EPCN are correct?
- A. EPCN system main memory deployment coaxial cable distribution network portion of the network, the HFC backbone mainly EPON technology fit therewith.
- B. EPCN is a passive EoC technology.The user terminal is a passive device, and the system transmission loss tolerance is low, which limits its application scope to a certain extent.
- C. EPCN conforms to HFC- based broadband access specifications such as DOCSIS 1.0/1.1/2.013.0 .
- D. EPCN is an active EoC technology, and the user terminal is an active device, thus avoiding the limitation of the network topology without passive EoC technology.
Answer: A,D
NEW QUESTION 215
The processing steps of the rules configured in CAR for packets are in order from front to back:
- A. Comments estimate discarded, continued
- B. Review assessment, classification and disposal
- C. Comments estimates continue discarded
- D. divided type, evaluation, disposal
Answer: D
NEW QUESTION 216
According to different operating modes, VPN can be divided into the following types____ .
- A. Intranet VPN
- B. CPE-Based VPN
- C. Network-Based VPN
- D. Internet VPN
Answer: B,C
NEW QUESTION 217
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