[Dec 08, 2021] Reliable GB0-391 Exam Tips Test Pdf Exam Material
New 2021 GB0-391 Test Tutorial (Updated 468 Questions)
NEW QUESTION 221
In the L2TP networking, there are three ways for LNS to authenticate users: proxy authentication, mandatory CHAP authentication and LCP renegotiation.The highest priority is ____ .
- A. on behalf of the agent authentication
- B. All the same
- C. Strong system CHAP authentication
- D. LCP renegotiation
Answer: D
NEW QUESTION 222
In the process of issuing the digital certificate application in the void, the PKI ( Public Infrastructure Ke , public key systems ) role of the various components were _____ .
- A. The CA sends the issued certificate to the LDAP server to provide directory browsing services
- B. real- time body want to revoke the certificate, the RA ( Registration Authority ) submit an application
- C. real body wishes to obtain a digital certificate, first of all to RA ( Registration Authority ) apply, RA after the audit entity identity, the identity of the entity and the public key information is sent to a digital signature to the CA ( Certificate Authority )
- D. After the CA verifies the digital signature, it agrees to the entity's application and issues a certificate for the entity
Answer: C,D
NEW QUESTION 223
The CPE in the following options is ____ .
- A. access the server
- B. cable mode m
- C. access into the switch
- D. machine top box
- E. DSLAM
- F. Wide band router / modem
Answer: B,D,F
NEW QUESTION 224
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 225
Among multiple VRF technologies, one VRF will have ______ .
- A. independent stand routing table
- B. independent stand router CPU
- C. independent stand routing protocol process
- D. independent stand physical or logical interface
Answer: A,C,D
NEW QUESTION 226
Which of the following parameters will not be included in an MP-BGP route withdrawal message ?
- A. RT 's Export Target property
- B. Private network label
- C. RD prefix
- D. RT 's Import Target attribute
Answer: A,B,D
NEW QUESTION 227
Analyzing from the network structure, the network security threat lies in ________ .
- A. Number of data during transmission
- B. Net internal network
- C. Number of data generation process
- D. Net network outside
Answer: A,B,D
NEW QUESTION 228
Which of the following statements about VPNv4 addresses is correct is _______ .
- A. VPNv4 address will not appear in user data packets
- B. VPNv4 address length is 96bit
- C. VPNv4 addresses have more RD prefixes than IPv4 addresses
- D. In BGP MPLS VPN group network, a public network forwarding the packet destination address is VPNv4 address
Answer: A,C
NEW QUESTION 229
For the label forwarding table of an LSR , the correct description is _______ .
- A. may be present in the same label value two label forwarding entry
- B. with a label forwarding entry Incoming label and outgoing label can not be the same
- C. with a label forwarding entry into the outgoing label and tag values are always the same
- D. can be present label value into two identical label forwarding entry
Answer: A
NEW QUESTION 230
Which of the following messages is used by the called party to indicate to the calling party that the call request is being processed and will not receive other call setup information for the call request ?
- A. COnnecting
- B. Call-proceeding
- C. Progress
- D. Alerting
Answer: B
NEW QUESTION 231
The following description does not belong to SSL handshake protocol layer function are ____ .
- A. Negative responsible for the establishment, maintenance SSL session
- B. insurance certificate, reliable data transmission
- C. verify the integrity of the card data
- D. isobutyl the normally turned off SSL connection
Answer: B,C
NEW QUESTION 232
Which of the following descriptions about the structure of SIP messages are correct ?
- A. There are some special SIP response messages without a start line
- B. elimination main message body content of the message is a description of the session to be set up, some special SIP message without the message body
- C. The some SIP message contains one or more message header, used to identify the type of message
- D. Since the start line, the message header, the message body is a SIP basic components message lacks any part of the SIP message is illegal cancellation message
Answer: B
NEW QUESTION 233
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. Wild Man mode ( Aggressive Mode )
- C. Fast speed mode ( New Group Mode )
- D. Main Mode ( the Main Mode )
Answer: B,D
NEW QUESTION 234
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. network gatekeeper
- B. MCU
- C. terminating end
- D. net off
Answer: B,C,D
NEW QUESTION 235
The following descriptions belong to the handshake layer function of the SSL protocol _______ .
- A. insurance certificate, reliable data transmission
- B. isobutyl the normally turned off SSL connection
- C. Association key used to encrypt the parameter provider
- D. Negative responsible for the establishment, maintenance SSL session
Answer: B,C,D
NEW QUESTION 236
The changes of MP-BGP protocol relative to BGP protocol include
- A. The new increase MP UNREACH NLRI attribute
- B. The new increase Extended Communities attribute
- C. new growth VPNv4 address family
- D. The new increase MP REACH NLRI attribute
Answer: A,B,C,D
NEW QUESTION 237
The configuration commands on the MSR router are as follows:
acl number 2001
rule 0 permit source 192.168.2.0 0.0.0.2
acl number 2002
rule 0 permit source 192.168.3.0 0.0.0.2
acl number 2003
rule 0 permit source 192.168.0.0 0.0.0.2
#
traffic classifier 2 operator or
if-match acl 2001
if-match acl 2002
if-match acl 2003
#
traffic behavior 2
filter den
#
qos polic 2
classifier 2 behavior 2
#
interface GigabitEthernet0/1
port link-mode route
ip address 192.168.1.1 255.255.255.0
qos appl polic 2 outbound
Then when the source address are 192.168.2.2 , 192.168.3.2.1 , 92.168.0.2 the packets from the port G0 / 1 forwarding outwardly, the following statement is correct ______
- A. Packets with the source address of 192.168.2.2 are forwarded normally
- B. 1 Packets with a source address of 92.168.0.2 are forwarded normally
- C. Forwarding of packets whose source address is 192.168.2.2 is blocked
- D. three message by the flow are blocked
Answer: A,B
NEW QUESTION 238
The following commands are configured on the MSR router:
acl number 3000
rule o permit ip source 100.0.10
acl number 3002
rule o permit ip source 100.0.0.0.0.0.0.255
interface GigabitEthemeto/1
port link -mode-route
jp.address 200.0.0.1255.255.255.0
qos gts acl 3002 cir 200 cbs 12500 ebs o queue-length50
qos gts acl 3000cir 100 cbs 6250 ebs o queue-length50
Then when the port G0/1 forwards packets with the source IP address of 100.0.0.1 in the outbound direction , which of the following statements is correct ( choose one or more )
- A. stream is greater than 200kbps , the packet shaping to 100kbps forwarded
- B. portions partial misconfigured
- C. flow is greater than 100bkps , less than 200kbps , the normal forwarding
- D. stream is greater than 200kbps , the packet shaping to 200kbps forwarded
- E. the flow amount is less than 100kbps forwarded when
- F. flow greater than 100kbps , the less than 200kbps instant message shaping to 100kbps forwarded
Answer: C,D,E
NEW QUESTION 239
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 ?
- A. dial number Interface
- B. ATM interface
- C. Yi Tai Ethernet port
- D. Virtual-Template
- E. Virlual-Ethernet
Answer: C,D
NEW QUESTION 240
If the user incorrectly configures the packet filtering strategy and filters all UDP packets, what will happen to the call in the H.323 network ?
- A. that a call will be discontinued in RAS stage
- B. that a call will be discontinued in H.245 stage
- C. that a call will be discontinued in Q.931 stage
- D. Does not affect calls between terminals
Answer: A
NEW QUESTION 241
Which of the following statements about IPSec and IKE is correct is ____ .( Choose one or more )
- A. After IPSec SA is established, data forwarding has nothing to do with IKE
- B. IKE is only responsible for providing security keys for IPSec establishment and does not participate in IPSec SA negotiation
- C. IKE only with IPSec in conjunction
- D. IPSec can only establish a security association through cooperation with IKE
Answer: A
NEW QUESTION 242
The business transmission between departments of an enterprise needs to adopt IPSec to provide end-to-end security protection, and data must be encrypted for transmission.
According to the requirements of the enterprise's business transmission security, which encapsulation protocol should IPSec use ? ( Choose one or more )
- A. ESP+AH encapsulation protocol
- B. AH encapsulation protocol
- C. DES Encapsulation Protocol
- D. ESP Encapsulation Protocol
Answer: A,D
NEW QUESTION 243
In a network accident, it was discovered that a certain host A received a large number of ICMPechorepl messages.The source address of the ICMPechorep was almost all the host addresses in the subnet where the host is located.What kind of attacks might this host have received ?
- A. Ping of Death
- B. SN-FLOOD attack
- C. Smurt attack
- D. Fraggle attack
Answer: C
NEW QUESTION 244
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