Ultimate Guide to Prepare GB0-391 with Accurate PDF Questions [Dec 26, 2021]
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NEW QUESTION 195
Best-Effort model has the following features ?
- A. pass through queues implemented
- B. reality now simple.Save processing resources and fast processing speed
- C. the number of broadband data streams, delay, jitter and packet loss controllable
- D. District Do not treat different types of business
Answer: A,B
NEW QUESTION 196
The information displayed on the MSR router is as follows:
acl number 2000
rule 0 permit source 192.168.0.0 0.0.0.255
acl number 2002
rule 0 permit source 192.168.2.0 0.0.0.255
#
traffic classifier 2 operator and
if-match acl 2002
traffic classifier 1 operator and
if-match acl 2000
#
traffic behavior 2
queue af bandwidth pct 30
traffic behavior 1
queue ef bandwidth pct 30 cbs-ratio 25
#
qos polic test
classifier 1 behavior 1
classifier 2 behavior 2
#
interface GigabitEthernet0/1
port link-mode route
duplex full
speed 10
ip address 192.168.1.1 255.255.255.0
qos appl polic test outbound
When the traffic rate of the packets with the source addresses of 192.168.0.2 , 192.168.2.2 , and 192.168.3.2 are 4Mbps , 4Mbps , 6Mbps , and no other background traffic is forwarded from port G0/1_ .Then the following statement is incorrect is _____
- A. The forwarding rate of packets with the source address of 192.168.0.2 is about 2.7Mbps
- B. The forwarding rate of packets with the source address of 192.168.0.2 is about 4Mbps
- C. The forwarding rate of packets with the source address of 192.168.2.2 is about 3Mbps
- D. The forwarding rate of packets with the source address of 192.168.2.2 is about 4Mbps
- E. The forwarding rate of packets with the source address of 192.168.0.2 is about 3Mbps
- F. The forwarding rate of packets with the source address of 192.168.2.2 is about 2.7Mbps
Answer: A,B,D,F
NEW QUESTION 197
The correct statement about application layer attack defense is _____ .
- A. should need to use professional security equipment to complete the application layer attack protection
- B. should require real-time attack signature database update the application layer attack protection
- C. be a general attack prevention layer network devices can be done
- D. should be fixed once and for all with the completion strategy layer attack protection can be used
Answer: A,B
NEW QUESTION 198
The PC uses the iNode VPN client to establish L2TP tunnels and sessions with network equipment , which belongs to the ____ topology of L2TP .
- A. alone stand LAC mode
- B. LAC launch mode
- C. the far end launch mode
- D. customer households LAC mode
Answer: D
NEW QUESTION 199
How do the calling UA and the called UA negotiate the media types and encoding methods supported by both parties ?
- A. Double side by exchanging message header capabilit field indicates the UAC / UAS supported media type and encoding
- B. Dual side by exchanging message body SDP indicated UAC / UAS supported media type and encoding
- C. When the UA registers with the registration server, it will register its own capabilities with the server, and the caller and the called party will know the capability set of the other party by querying the server
- D. to the answers are right
Answer: B
NEW QUESTION 200
Which of the following access methods does SSL VPN provide ?
- A. TCP access method
- B. IP access method
- C. HTTP access method
- D. WEB access method
Answer: A,B,D
NEW QUESTION 201
In the SIP network, which of the following devices are not UA?
- A. SIP server
- B. lP phone
- C. language voice gateway
- D. connected to a common voice on the gateway PSTN phone
Answer: A,D
NEW QUESTION 202
When SIP-UA calls the called party through the proxy server, ____ .
- A. In addition to the external location request message, the calling UA other messages need not be forwarded through a proxy server
- B. In this environment, the called UA response message is sent instead of the main junction proxy called UA
- C. Lord called UA All messages are forwarded through a proxy server
- D. to the not right
Answer: B,C
NEW QUESTION 203
In the private network routing table of the PE equipment, the next hop of the remote user's private network route is ______ .
- A. distal end CE of the loopback interface address
- B. distal end PE of the loopback interface address
- C. present P E of loopbac K interface address
- D. distal end of the PE and CE interface address connected
Answer: B
NEW QUESTION 204
In the VoIP network, the bandwidth saved by VAD technology has nothing to do with which of the following solid elements
- A. selected by signaling type
- B. said language and characteristics of the speaker
- C. selected encoding type used
- D. mesh network extent owned room
Answer: A,D
NEW QUESTION 205
a - H.323 gateway received when registering with the gatekeeper RCF message stating ____ .
- A. network gatekeeper refused to register the gateway
- B. Net observe accepted the registration of the gateway
- C. net off registration request is being processed gateway
- D. network related parameters transmitted error
Answer: B
NEW QUESTION 206
What is correct about DOS attacks is ____ .
- A. on to DOS attacks can be controlled by configure access lists on a network device to defense
- B. for at DOS attack in the FTP FLOOD attack can be taken to limit the number of connections per second to defense
- C. on to DOS attacks in the TCP FLOOD attack, you can use TCP proxy mechanism to defense
- D. DOS attacks are aimed at reducing the ability of the attacked system to provide services
Answer: B,C,D
NEW QUESTION 207
When the label distribution method is ______ , the downstream device needs to wait for the label distribution application from the upstream device to distribute the label.
- A. DU ( DOWNstream Unsolicited ) downstream autonomous
- B. There order mode ( Odered )
- C. DOD ( DOWNstream On Demand ) downstream on demand
- D. independent stand mode ( work of the Independent )
- E. Since the embodiment ( Liberal Retention MODE )
Answer: C
NEW QUESTION 208
In the H.323 call flow, if two terminals registered to the same gatekeeper adopt the routing call mode, then
- A. Messages such as ARQ and ACF are exchanged between the two terminals through the gatekeeper
- B. to the answers are right
- C. H.245 capability negotiation is completed between two terminals through a gatekeeper
- D. two terminals is controlled by a signaling interaction gatekeeper call
Answer: C,D
NEW QUESTION 209
In BGP MPLS VPN networking, where does the RT value exist in ______ ?
- A. In the private network packet forwarded by the PE to the P device
- B. In the private network packet forwarded by PE to CE
- C. In the routing update message exchanged between PEs
- D. In the route cancellation message exchanged between PEs
Answer: C
NEW QUESTION 210
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 211
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 212
In the basic configuration of L2TP in independent LAC mode , the description of the tunnel verification function is correct.
- A. tunnel channel request can not be verified by the LNS initiated
- B. lack of provincial cases, tunnel authentication is enabled.
- C. lack of provincial cases, tunnel authentication is disabled
- D. tunnel channel request can be verified by the LAC initiated
Answer: B,D
NEW QUESTION 213
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