[Mar 26, 2022] GB0-391 Exam Dumps - Try Best GB0-391 Exam Questions - ValidExam

Verified GB0-391 exam dumps Q&As with Correct 468 Questions and Answers

NEW QUESTION 226
In the H.323 call flow, if two terminals registered to the same gatekeeper use the direct call mode, then

• A. to the answers are right
• B. H.245 capability negotiation is completed directly between two terminals
• C. Messages such as ARQ and ACF are directly exchanged between the two terminals
• D. Messages such as Setup and Connect are directly exchanged between the two terminals

Answer: B,D

 

NEW QUESTION 227
In BGP MPLS VPN networking, where will the private network label exist in the following locations ?

• A. In the private network packet forwarded by PE to CE
• B. In the private network packet forwarded by the PE to the P device
• C. Private network routing between PE and CE
• D. Private network routing between PEs

Answer: B,D

 

NEW QUESTION 228
AAA supports the accounting method of _____ .

• A. No billing
• B. This ground billing
• C. TACACS accounting
• D. RADIUS accounting

Answer: A,B,C,D

 

NEW QUESTION 229
Regarding echo in the VoIP telephone system, which of the following descriptions are correct ?

• A. language voice gateway equipment itself does not bring new echo, but the lP network brings network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network Felt echo
• B. speech voice gateway when performing analog to digital conversion may introduce echo, but can be configured to suppress echo in voice gateway function to reduce this effect
• C. In a VoIP network, the echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.
• D. back sound into electrical echo and acoustic echo, a conventional telephone system is mainly due to two electrical echo, four-wire conversion impedance mismatch caused by

Answer: A,D

 

NEW QUESTION 230
The following statement about RED random early detection is incorrect.

• A. In discarded after a congested port
• B. flat average queue length is greater than the maximum discard threshold, packets are dropped randomly
• C. The higher the priority of the message , the lower the probability of discarding it, which means the less discarded it is
• D. flat average queue length is less than the minimum discard threshold, discarding packets not
• E. flat average queue length is greater than the minimum discard threshold, packets are dropped randomly

Answer: A,B,C

 

NEW QUESTION 231
The wrong description of the relationship between RT and RD is ____ .

• A. with a VPN to RT value must RD same value
• B. the RD value of their respective VPN of RT attributes Import Target property or Export Target a property list
• C. same on a device different VPN of RD value and the RT attribute values can not be configured to be the same

Answer: A,B,C

 

NEW QUESTION 232
In the EPON system, the port that the ONU device connects to the user is

• A. ONU
• B. OLT
• C. UNI
• D. NNI

Answer: C

 

NEW QUESTION 233
Which of the following codes has the lowest bandwidth requirement?

• A. G.729
• B. G.723
• C. G.711
• D. G.726

Answer: B

 

NEW QUESTION 234
Which of the following statements about SSL VPN access control is correct?

• A. dynamic state does not require authorization client terminal installs
• B. dynamic state authorization authorization and security policy is still the intersection of authorization
• C. dynamic state authorization is not required to create a security policy
• D. static state authorized authentication including local and external authentication certification in two ways

Answer: A,C,D

 

NEW QUESTION 235
BGP MPLS VPN group network, private network packets from the CE side into the PE the device , PE how to determine the packet belongs to VPN_______ .

• A. root according to the purpose of the packet IP address determination
• B. Root , according to the message carried by private label judge
• C. root data message into the PE device interface belongs to VPN Analyzing
• D. root according to the packet's source IP address is determined

Answer: C

 

NEW QUESTION 236
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. portions partial misconfigured
• B. the flow amount is less than 100kbps forwarded when
• C. flow is greater than 100bkps , less than 200kbps , the normal forwarding
• D. flow greater than 100kbps , the less than 200kbps instant message shaping to 100kbps forwarded
• E. stream is greater than 200kbps , the packet shaping to 100kbps forwarded
• F. stream is greater than 200kbps , the packet shaping to 200kbps forwarded

Answer: B,C,F

 

NEW QUESTION 237
Which of the following statements about SSL VPN access control is correct is ______ .

• A. dynamic state requires authorization client terminal installs
• B. dynamic state authorization need to create a security policy
• C. static state authorized authentication including local and external authentication certification in two ways
• D. dynamic state authorization and authorization are two separate static access control

Answer: A,B,C

 

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 GigabitEthemet0/1
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. portions partial misconfigured
• B. stream is greater than 200kbps , the packet shaping to 100kbps forwarded
• C. stream is greater than 200kbps , the packet shaping to 200kbps forwarded
• D. the flow amount is less than 100kbps forwarded when
• E. flow is greater than 100bkps , less than 200kbps , the normal forwarding
• F. flow greater than 100kbps , the less than 200kbps instant message shaping to 100kbps forwarded

Answer: B,D,F

 

NEW QUESTION 239
The four routers R1 , R2 , R3, and R4 are connected in sequence, and Loopback0 interfaces are created on R1 and R4 , and the interface addresses are 1.1.1.1 and 4.4.4.4 respectively.The four devices are configured with static routing protocols to ensure Loopback0 of R1 and R4 .The address is reachable, and a GRE Tunnel is established between R1 and R4 .Check the tunnel interface information on R1 as follows:
[R1]displa interface Tunnel O
Tunnelo current state: UP
Tunnelo current statle: UP
Line protocol current state: UP
Description: Tunnel 0 Interface
The Maximum transmit Unit is 1476
Internet Addess is 10.1.1 .1/30 Primar.
Encapsulation isTUNNEL aggregation ID not set
Tunnel source l.1.1.1 destination 4.4.4.4
Tunnel keeepalive disable
Tunnel protocol/transport GRE/IP.
GRE key disable
Checksumming of GRE packets disabled
Last 300 seconds input:.2 btes/secl 0 packet/sec.
Last 300 seconds output:..2 bytes/sec , 0 packets/sec.
15packets input 840bytes.
0 input error
27packets output , 1248btes
0 0utput error
At this time, if the interrupt R2 and R3 link between, the following statement is correct ____

• A. The status of the Tunnel interface on R1 is Down
• B. Rl on -Tunnel interface remains UP state
• C. The source IP of the Tunnel interface of R4 is 4.4.4.4 , and the destination IP is 1.1.1.1
• D. The IP address of the Tunnel interface of R4 should be 10.0.0.2.

Answer: B,C,D

 

NEW QUESTION 240
The changes of MP-BGP protocol relative to BGP protocol include

• A. The new increase Extended Communities attribute
• B. The new increase MP REACH NLRI attribute
• C. The new increase MP UNREACH NLRI attribute
• D. new growth VPNv4 address family

Answer: A,B,C,D

 

NEW QUESTION 241
When the link type of the ONU port is Trunk , its processing method for upstream packets is _____ .

• A. Only allow tagged messages to pass
• B. for without receipt of the Tag message, add the default VLAN Tag ; for received with Tag packets forwarded directly
• C. only allowed without Tag packets to pass through, and the packets add the default VLAN of Tag
• D. Only allow the packets with the default LAN Tag to pass and go to the tag

Answer: B

 

NEW QUESTION 242
The advantages of modular network architecture include ____ .( Choose one or more )

• A. for each module can be separately planning and deployment, network functions can be added or removed, and conducive to building a complex network module by way of additions and deletions.
• B. allowed to share data, resources and capacity among many different application functions or applications, participate in business processes.
• C. Yun Xu dynamically invoked through open interfaces IT resources to achieve the standard, compatibility, security, intelligent and manageable IT environments.
• D. taken on behalf of the traditional hierarchical network model, to facilitate planning and deploying the network.

Answer: A

 

NEW QUESTION 243
In the private network routing table of the PE equipment, the next hop of the remote user's private network route is ______ .

• A. present P E of loopbac K interface address
• B. distal end CE of the loopback interface address
• C. distal end PE of the loopback interface address
• D. distal end of the PE and CE interface address connected

Answer: C

 

NEW QUESTION 244
Execute the command on the MSR router and output the following information:
Interface: GigabitEthernet0/1
Output queue: (Urgent queuing: Size/Length/Discards ) 0/100/0
Output queue: (Protocol queuing: Size/Length/Discards ) 0/500/0
Output queue: (Priorit queuing: PQL 1 Size/Length/Discards)
Top: 3/20/42878 Middle: 10/40/0 Normal: 60/60/259195 Bottom: 80/80/344297
Then the following statement is incorrect :

• A. PQ queue scheduling does not take effect , Top traffic has packet loss
• B. PQ queue scheduling takes effect , no packet loss for Top traffic
• C. PQ queue scheduling takes effect , and Top traffic has no packet loss
• D. PQ queue scheduling does not take effect , and Middle traffic has no packet loss
• E. PQ queue scheduling does not take effect , Top traffic has no packet loss
• F. PQ queue scheduling takes effect , Top traffic has packet loss

Answer: A,B,C,E

 

NEW QUESTION 245
The correct statement regarding the defense of malformed messages is ______ .

• A. needles of ping of death attacks by detecting sensing Ping whether the request packet over a length of over 65536 bytes to discriminate whether the attack packets, if the length exceeds 65536 bytes, the packet will be discarded.
• B. abnormal shaped packet attacks targeted defense needs for each attack
• C. needle deformity TCP packet attack, by determining TCP determines whether the packet is a packet attack packet flag for .6 flag bits are all 1 or .6 flag bits are all is 0 or SN and FIN simultaneously It is a packet discards
• D. needle for Teardrop , information may be cached fragment attack by class, each source, the purpose of the IP , the packet ID the same set of configuration, the maximum cache 10,000 groups , the data in the buffer reaches a maximum when directly discards fragmented, while According to the cached fragmentation information, analyze the legitimacy of IP packet segmentation, and directly discard illegal IP packets to resist attacks

Answer: A,B,C,D

 

NEW QUESTION 246
Configure the following command on the MSR router: qos rtpq start port 16384end-port 32767bandwidth1000cbs25000
Then the correct statement is

• A. start-por and end-port are configured with UDP port numbers
• B. its configured start-port port number as the source port number, End Port- port number and destination port number
• C. start-por and end-port are configured with TCP port numbers
• D. provided apparatus applied RTPQ queue

Answer: A,D

 

NEW QUESTION 247
Among the following fiber access methods, the highest degree of fiberization is

• A. FTTB
• B. FTTC
• C. FTTA
• D. FTTH

Answer: D

 

NEW QUESTION 248
M In BGP MPLS VPN on a network station of the public network equipment, displa mpls ldp lsp command command checks its label forwarding table, the following results described _______ .
[PE1] dis mpls ldp lsp
LDP LSP Information
-------------------------------------------------- -------------------------------------------------- ------------
SN DestAddres s/Mask In/OutLabel Next-Hop In/Out-Interface
-------------------------------------------------- -------------------------------------------------- -------------
1 1.1.1.1/32 3/NULL 127.0.0.1 Eth0/0/InLoop0
2 1.1.1.2/32 NULL/1024 100.0.0.2 ---------Eth0/0
3 1.1.1.3/32 NULL/3 100.0.0.2 ---------Eth0 /0

• A. 1.1.1.3/32 is the interface address of the public network device directly connected to PE1 , so the output label is 1024
• B. 1.1.1.3/32 is the interface address of the public network device directly connected to PE1 , so the output label is 3
• C. 1.1.1.3/32 is the local interface address of PE1 , all outgoing labels are NULL and outgoing labels are 3.
• D. 1.1.1.3/32 is the local interface address of PE1 , all outgoing labels are NULL , and incoming labels are 3.

Answer: B,D

 

NEW QUESTION 249
According to the encapsulation form of the message, the IPSec working mode is divided into ____ .

• A. Main mode
• B. Wild Man mode
• C. Tunnel Road mode
• D. transfer transport mode

Answer: C,D

 

NEW QUESTION 250
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