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NEW QUESTION 220
A VoIP network using the H.323 protocol is interconnected with a PSTN network.Which of the following components must be included in the VoIP network to ensure that users can call local calls from the VoIP network ?
- A. terminating end
- B. network gatekeeper
- C. net off
- D. MCU
Answer: A,C
NEW QUESTION 221
In a VoIP network where calls are made through a gatekeeper , what will happen when the gatekeeper cannot determine the location information of the called terminal within its jurisdiction ?
- A. The calling party replies to the gatekeeper rejection ( GRJ ) message
- B. Reply to the caller with a location rejection ( LRJ ) message
- C. Reply to the caller with a permission rejection ( ARJ ) message
- D. to the answers are right
Answer: D
NEW QUESTION 222
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 takes effect , no packet loss for Top traffic
- B. PQ queue scheduling does not take effect , Top traffic has no packet loss
- C. PQ queue scheduling does not take effect , and Middle traffic has no packet loss
- D. PQ queue scheduling does not take effect , Top traffic has packet loss
- E. PQ queue scheduling takes effect , Top traffic has packet loss
- F. PQ queue scheduling takes effect , and Top traffic has no packet loss
Answer: A,B,D,F
NEW QUESTION 223
In a typical PPPoE network, both PPPoE Server and PPPoE Client are MSR routers.If you want PPPoE to work in permanent online mode, which of the following configurations are required ? ( Choose one or more ) .
- A. the PPPoE Serve, R & lt on the configuration: [the RTA-virtual- Templatel] PPPoE -client-Number Dial-the bundle.1
- B. Configure on PPPoE-Server : [RTA-Virtual-Templatel] pppoe- client dial -bundle-number l idle-timeout 65535
- C. Configure on PPPoE Client : [HG-Dialerl] pppoe-client dial-bundle-number l idle -timeout O
- D. Configure on PPPoE Client : [HG-Ethernet0/0] pppoe-client dial-bundle-number 1
- E. Configure on PPPoE Server : [RTA- EthernetO/O] pppoe-client dial-bundle-number 1
- F. Configure on PPPoE Client : [HG-Dialer l] pppoe-client dial-bundle-number l
Answer: D
NEW QUESTION 224
G A good safety system should be _____ .
- A. of personnel in violation of the security regime of penalties
- B. indeed ensure every job has its rules and regulations to follow
- C. Reward people who have long followed the safety system
- D. ensure ensure safety system is capable of forming a virtuous cycle of continuous self-improvement
Answer: A,B,C,D
NEW QUESTION 225
QoS can determine which specific behavior set a message belongs to through _____ .( Choose one or more )
- A. matching with 802.1x
- B. match with IP Precedence
- C. match with COS
- D. matched with IP addresses , the MAC address , the VLAN number, protocol type, port number of the transport layer
- E. Configure the trusted port priority or packet priority on the interface
- F. match with DSCP
Answer: B,C,D,E,F
NEW QUESTION 226
Among the following broadband access transmission media, the ones that are more suitable for covering remote areas without traditional communication lines include
- A. electric power line
- B. no radio waves
- C. same coaxial cable
- D. Copper quality UTP
- E. optical fiber
Answer: A,B
NEW QUESTION 227
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 228
Which of the following descriptions about H.323 terminals is correct is ____ .
- A. P through PSTN telephone is a standard H.323 terminal
- B. even connected to the PSTN telephone network fax machine is a standard H.323 terminal equipment
- C. & Poor pass H.323 terminal may not support fax functionality
- D. P pass H.323 terminals may not support the video feature
Answer: C,D
NEW QUESTION 229
Compared with IKE main mode, which of the following advantages does IKE aggressive mode have ?
- A. IKE aggressive mode is more secure than main mode
- B. IKE aggressive mode can provide authentication
- C. adopted by IKE aggressive mode can provide a speed negotiation
- D. In the case that both parties in communication can know the IP address of the initiator in advance and need to use the pre-shared key, the aggressive mode can be used
Answer: C,D
NEW QUESTION 230
In the SIP network, which of the following devices belong to UA?
- A. connected to a common voice on the gateway PSTN phone
- B. SIP server
- C. language voice gateway
- D. IP phone
Answer: C,D
NEW QUESTION 231
When the user uses the phone, after the telephone handle of the room starts to input the called number, which of the following signaling does the ringing of the called phone belong to ____ ?
- A. to address signaling
- B. letter information signaling
- C. monitoring tube signaling
- D. Call call signaling
Answer: B
NEW QUESTION 232
In the BGP MPLS VPN networking, the correct statement about the relationship between labels is _______ .
- A. Private network labels cannot be identified on all PE and P devices
- B. 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
- C. Between public network devices, private network packets usually have two layers of MPLS labels, of which the outer layer is the public network label
- D. Between PE and CE devices, private network packets have only one MPLS label, which is a private network label
Answer: B,C
NEW QUESTION 233
The following statement about VoIP voice transmission is wrong
- A. need to UDP provides multiplexing mechanism
- B. needs to UDP provides a time stamp mechanism
- C. need to RTP to provide re-ordering mechanism
- D. needed to TCP to provide reliability mechanisms
Answer: B,D
NEW QUESTION 234
The following information about the AH ( the Authentication Header , Authentication Header ) and the ESP ( Encapsulating Securlt Paload , the Encapsulating Security Payload ) described right there ______ .( Choose one or more )
- A. two who can provide data origin authentication and optional anti-replay service
- B. two who can provide data integrity protection
- C. two who can provide confidentiality protection
- D. two who can be used at the same time
Answer: A,B,D
NEW QUESTION 235
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