Sep-2021 Latest VCEPrep GB0-391 Exam Dumps with PDF and Exam Engine Free Updated Today!
Following are some new GB0-391 Real Exam Questions!
NEW QUESTION 122
The user wants to design an H.323 network and requires unified and centralized control of all call rights.Which of the following components is not necessary ?
- A. terminating end
- B. net off
- C. network gatekeeper
- D. MCU
Answer: B,D
NEW QUESTION 123
xz company requires to build its network based on modular enterprise network architecture.Company Z has 1 R&D base in Shenzhen and Xi'an , and an office building in Beijing and Shanghai ; it has offices with more than 50 people in 23 capital cities ; it has small offices with no more than 8 people in 200 small and medium-sized cities .There are usually more than 200 market and technical personnel on business trips at any given time .Company Z strictly prohibits employees from using the company network to visit websites that are not related to work.According to these circumstances, the network module that Z company should have is ____ .
- A. dedicated line / packet switched access
- B. Large type branch network
- C. far away / distributed office network
- D. Internet access
Answer: A,D
NEW QUESTION 124
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 have all the ONU data
- B. Line Road 0 ~ n- downlink data is the same
- 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 125
802.1p CoS divided the ______ Classes of Service.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 126
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 )
- A. L2TP VPN
- B. BGP/MPLS VPN
- C. GRE VPN
- D. SSL VPN
Answer: A,D
NEW QUESTION 127
Which of the following statements about RT , RD, and private network labels are correct is _______ .
- A. The private network label is used to identify the VPN to which the private network message belongs
- B. RT for each one VPN express their choice and preferences routing instance
- C. RT , RD and private network labels have different functions in BGP MPLS VPN , and they are irreplaceable.
- D. the RD standard identification of the routing information belongs the VPN , mainly play a role when the withdrawn route
Answer: A,B,C,D
NEW QUESTION 128
The means of business isolation using logical isolation are ______ .
- A. Group to build MPLS-VPN network
- B. Jian Li IPSec tunnel
- C. the dedicated lines
- D. make use SSL VPN
Answer: A,B,D
NEW QUESTION 129
According to Nquist 's theorem, the telephone system samples human voice ______ times per second in order to fully represent the characteristics of the voice signal.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION 130
In the PPPoE negotiation process, which of the following PPPoE messages must contain Service-Name information ?
- A. PADR ( PPPoE Active Discover Request )
- B. PADI ( PPPoE Active Discover Initiation )
- C. PADT ( PPPoE Active Discover Terminate )
- D. PADO ( PPPoE Active Discover Offer )
Answer: A,B,D
NEW QUESTION 131
Which of the following command to check MPLS LDP 's Session whether to establish complete ?
- A. displa mpls ldp session
- B. displa mpls ldp
- C. displa mpls ldp lsp
Answer: A
NEW QUESTION 132
use IKE is IPSec provides auto-negotiation key exchange and create SA during the service, in the IKE defines which of the first stage of consultation kinds of IKE exchange mode ?
- A. channel information exchange mode ( Informational the Exchange Mode )
- B. Fast speed mode ( New Group Mode )
- C. Wild Man mode ( Aggressive Mode )
- D. Main Mode ( the Main Mode )
Answer: C,D
NEW QUESTION 133
To clear the secure tunnel established by ike , which of the following commands should be used ?
- A. reset ipsec sa
- B. reset ike tunnel
- C. reset ike sa
- D. reset ike
Answer: C
NEW QUESTION 134
PPP link ? Case of compression can reduce the amount of data transmitted, thus indirectly increasing the link throughput
- A. Department of sub-header information remains unchanged
- B. contained a large amount of charge in the repeating string that
- C. portions partial change of header information laws
Answer: A,B,C
NEW QUESTION 135
In the conservative label retention mode, illustrated by networking, LSR2 can keep what stage LSR needle to 20.0.0.1/24 tag information that route ?
- A. LSR4
- B. LSR1
- C. LSR5
- D. LSR3
Answer: D
NEW QUESTION 136
a - H.323 gateway received when registering with the gatekeeper RCF message stating ____ .
- A. Net observe accepted the registration of the gateway
- B. network gatekeeper refused to register the gateway
- C. net off registration request is being processed gateway
- D. network related parameters transmitted error
Answer: A
NEW QUESTION 137
In L2TP networking, what are the authentication methods for users by LNS?
- A. LCP renegotiation
- B. IPCP renegotiation
- C. on behalf of the agent authentication
- D. Strong system CHAP authentication
Answer: A,C,D
NEW QUESTION 138
8 In the configuration of stateful inspection firewall, _____ must be configured.
- A. Apply ASPF strategy under the interface
- B. adjusting the entire TCP / UDP detection time protocol
- C. given meaning ASPF policy
- D. Full Board start the firewall function
Answer: A,C,D
NEW QUESTION 139
The following descriptions belong to the handshake layer function of the SSL protocol _______ .
- A. isobutyl the normally turned off SSL connection
- B. Negative responsible for the establishment, maintenance SSL session
- C. insurance certificate, reliable data transmission
- D. Association key used to encrypt the parameter provider
Answer: A,B,D
NEW QUESTION 140
Configure the following commands on the MSR router:
qos rtpq start port 16384end-port 32767bandwidth1000cbs25000
Then what is incorrect in the following statement is
- A. provided apparatus applied RTPQ queue
- B. start-por and end-port are configured with UDP port numbers
- C. its configured start-port port number as the source port number, End Port- port number and destination port number
- D. start-por and end-port are configured with TCP port numbers
Answer: C,D
NEW QUESTION 141
Among the following tunneling technologies that do not have the function of data encryption are ______ .
- A. GRE
- B. L2TP
- C. MPLS-VPN
- D. IPSec tunnel
Answer: A,B,C
NEW QUESTION 142
The label value 3 has a special meaning in the MPLS network , which means ______ .
- A. As a result of the forwarding equivalence class MPLS label forwarding entry into label 3 , showing the device is the inverse of the forwarding equivalence class of the first hop device
- B. As a result of the forwarding equivalence class MPLS label forwarding entry into label 3 , indicates that the device is a reciprocal of the second hop forwarding equivalence class of device
- C. As a result of the forwarding equivalence class MPLS label forwarding entry of the label 3 , showing the device is the inverse of the forwarding equivalence class of the second hop device
- D. As a result of the forwarding equivalence class MPLS label forwarding entry of the label 3 , showing the device is the inverse of the forwarding equivalence class of the first hop device
Answer: A,C
NEW QUESTION 143
During the SIP UA calling the called party through the redirect server,
- A. After resetting the server to help obtain the location of the called UA , the calling UA directly initiates a call to the called UA
- B. In addition to the external location request message, the calling UA other messages do not need to be forwarded by the redirection server
- C. Lord called UA All messages are forwarded by redirecting server
- D. to the not right
Answer: A,B
NEW QUESTION 144
The private network label corresponding to the remote user's private network route learned by the PE equipment is assigned by which of the following equipment _______ .
- A. This end of PE is provided apparatus
- B. the travel P device
- C. of the end CE device
- D. for end PE device
Answer: D
NEW QUESTION 145
The following information about IToIP The mistake is ____ .
- A. based on IToIP built IT system users can create a standard, compatibility, security, intelligent and manageable IT environments.
- B. IToIP requires an IT system to be constructed with an IP network as the infrastructure .
- C. IToIP closely connects applications and infrastructure, greatly improving the operating efficiency of IT systems.
- D. various kinds of IT resources can easily share and use standard lP infrastructure, to achieve further integration of various technologies and applications of communications, computing, storage, networking and so on.
Answer: C
NEW QUESTION 146
The encapsulation format of the voice data transmitted in the VoIP network data is ______ .
- A. IP|TCP |RTP| voice data
- B. IP|UDP|RTP| Voice data
- C. IP|UDP|RTCP|RTP| Voice data
- D. IP| Voice Data
Answer: B
NEW QUESTION 147
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