GB0-391 Exam Dumps Pass with Updated 2022 Certified Exam Questions
GB0-391 Exam Questions - Real & Updated Questions PDF
NEW QUESTION 173
There are a large number of two-way video and voice communication needs between branches and headquarters of a company, if you want to choose a broadband access to connect branch offices and headquarters, the following options are the most ideal of a _____ .
- A. APON/BOPN
- B. EPON
- C. ADSL
Answer: B
NEW QUESTION 174
What fields does MPLS label have ?
- A. Label
- B. S
- C. TTL
- D. EXP
Answer: A,B,C,D
NEW QUESTION 175
About CBQ said correct method ______
- A. package contains .1 th BQ , for supporting the AF service, broadband guaranteed queue and controllable delay
- B. It is a congestion management technology implemented by QoS strategy
- C. packet contains .1 th default queue for supporting the BE service, using the WFQ queue scheduling
- D. package contains .1 th the LLQ , to support EF traffic, is transmitted absolute priority, guaranteed latency
Answer: B,D
NEW QUESTION 176
The encapsulation format of the voice data transmitted in the VoIP network data is ______ .
- A. IP|RTP| voice data
- B. IP|TCP |RTP| voice data
- C. IP|UDP|RTP| voice data
- D. IP|UDP|RTCP|RTP| Voice data
Answer: C
NEW QUESTION 177
The quality of service of a data network usually has different requirements due to different services.Compared with data services, voice and video services are more focused on
- A. Maximum number of concurrent connections
- B. band width
- C. When delay
- D. When the delay jitter
Answer: C,D
NEW QUESTION 178
Which of the following statements about IKE is correct is ____ .( Choose one or more )
- A. The first phase of IKE exchange mode has main mode and quick mode
- B. IKE uses an asymmetric key algorithm when exchanging keys
- C. IKE SA is generated when the second phase of IKE is completed
- D. The exchange of keys in both IKE modes requires authentication
Answer: B,D
NEW QUESTION 179
Based on SOA network architecture to enterprise IT systems into which of the following levels ? ( Select one or more )
- A. will then layer
- B. mesh network layer
- C. base infrastructure layer
- D. should application layer
Answer: C,D
NEW QUESTION 180
A session is initiated by a UA through a proxy server, when a UA wants to end the session.
- A. will be the end of the session request is sent to the other party at the same time UA and proxy server
- B. will be the end of the session request to the proxy server
- C. will be the end of the session request is sent directly to the other UA
- D. needs to be based on the proxy server is no status quo is the status quo or to determine if the request will be sent to which device
Answer: B
NEW QUESTION 181
The cable used in the Ethernet 1000BASE-LX standard is _______ The maximum transmission distance is ________ .
- A. 4 pairs of Category 5 UTP twisted pair, 100m
- B. 4 pairs of Category 3 UTP twisted pair, 100m
- C. multi- mode fiber, 550m
- D. single -mode optical fiber, 5000m
- E. 2 pairs of STP twisted pair, 25m
- F. 2 pairs of Category 5 UTP twisted pair, 100m
Answer: D
NEW QUESTION 182
In the basic configuration of L2TP in independent LAC mode , the description of the name of the local end of the tunnel is correct.
- A. default case considered, the name of a tunnel for the name of the system
- B. In the system view, use the Tunnel-name name command to configure the local tunnel name
- C. default case considered, the name of a tunnel is empty
- D. In the L2TP group view, use the Tunnel name name command to configure the local tunnel name
Answer: A,D
NEW QUESTION 183
Which description is correct about L2TP VPN and SSL VPN?
- A. All need to install and maintain the client
- B. All support lP access mode
- C. are based on UDP encapsulation
- D. Both support Web access
Answer: B
NEW QUESTION 184
Which of the following statements about SOA and IToIP is correct is ____ .
- A. IToIP allows flexible, fast and efficient construction of enterprise intelligent applications, and can quickly adapt to changes in enterprise business processes.
- B. SOA is based on the network, eliminates the information gap caused by heterogeneous systems, integrates various services such as storage, security, and multimedia, and realizes the componentization and resourceization of IT infrastructure.
- C. SOA solutions to the requirements of IT infrastructure integration, unified web-based technology to build IT infrastructure platform.
- D. The IToIP solution embodies the core idea of SOA .
Answer: A,D
NEW QUESTION 185
In the BGP MPLS VPN networking, the correct statement about the relationship between labels is _______ .
- A. MPLS After enabling the penultimate hop, the penultimate and final message hop between public network equipment is only one layer MPLS label, private label is
- B. Between public network devices, private network packets usually have two layers of MPLS labels, of which the outer layer is the public network label
- C. Private network labels cannot be identified on all PE and P devices
- D. Between PE and CE devices, private network packets have only one MPLS label, which is a private network label
Answer: A,B
NEW QUESTION 186
Which statement about the VLAN planning of the EPCN network is correct?
- A. PUPSPV mode can accurately user and business equipment, each user's business has a corresponding VLAN ID identification
- B. PUPSPV mode can be precisely designated user service, each service of each user has a corresponding VLAN ID identity
- C. In PUPV mode, all users in the cell share the same business VLAN ID
- D. The PSPV method uses the same VLAN to mark all services of the same user , but the service quality cannot be guaranteed.
Answer: A,B
NEW QUESTION 187
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 )
- A. ITU 992.2
- B. ITU 992.4
- C. ITU 992.3
- D. ITU 992.1
Answer: A,B
NEW QUESTION 188
During the SIP UA registration process, a response message with a status code of 401 was received, stating that ____?
- A. UA has been registered on the registration server normally
- B. Table shows UA request message sent by the server contains the fields do not know, registration failed
- C. Table shows the server needs UA transmit authentication information, UA after receiving the response, it would Laid own authentication information registration request sent by a second server to register
- D. Table showing UA sends a request message packet server sets the field do not know, but it has been ignored server, UA still successfully registered
Answer: C
NEW QUESTION 189
Which of the following statements about IPSec and IKE is incorrect is ________ .( Choose one or more )
- A. After IPSec SA is established, data forwarding has nothing to do with IKE
- B. IPSec can only establish a security association through cooperation with IKE
- C. IKE only with IPSec in conjunction
- D. IKE only responsible for the IPSec established to provide a security key, not participate and IPSec SA negotiations
Answer: B,C,D
NEW QUESTION 190
The calling UA sends a request message and receives a 200 OK response from the called UA .How can the calling UA cancel the request ?
- A. Li ie the called UA sent Back message
- B. Li ie the called UA send Cancel message
- C. Li ie the called UA sent BE message
- D. No law have requested revocation
Answer: D
NEW QUESTION 191
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