SNMP uses connectionless UDP as the transmission protocol, whereas NETCONF uses connection- oriented TCP.
A. TRUE
B. FALSE
Answer:
B
User Votes:
A
50%
B
50%
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Question 2
Which of the following statements are true about OpenFlow interface information reporting? (Multiple Choice)
A. After the OpenFlow channel is successfully established, the controller actively queries port information from FPs.
B. The controller sends Multipart Request messages to query port information.
C. FPs respond with a Multipart Reply message for batch delivery of port information.
D. When a port changes, the corresponding FP actively sends a Flow Mod message to report the port change information.
Answer:
AC
User Votes:
A
50%
B
50%
C
50%
D
50%
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0/ 1000
Question 3
On an SDN network, OpenFlow connection backup data mainly includes which of the following? (Multiple Choice)
A. Collected forwarder interface information
B. Binding relationship between the logical interface of the controller and the forwarder's physical interface
C. Connection management information of the forwarder
D. Collected forwarder VLAN information
Answer:
CD
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 4
OpenFlow channel establishment and maintenance involves which of the following messages? (Multiple Choice)
A. Collected forwarder interface information
B. Features Request message
C. Echo Request message
D. PortStatus message
Answer:
AB
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 5
In the SDN VXLAN solution, when an OpenFlow connection between the controller and a forwarder is torn down, the forwarder retains the static MAC address and ARP entries so that traffic can be normally forwarded.
A. TRUE
B. FALSE
Answer:
B
User Votes:
A
50%
B
50%
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Question 6
In the OpenFlow network switch model, the underlying data channel opens the flow table's public API to the outside and uses the SNC to control the entire network.
A. TRUE
B. FALSE
Answer:
A
User Votes:
A
50%
B
50%
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Question 7
Which of the following statements about BGP are true? (Multiple Choice)
A. BGP calculates and discovers the optimal route.
B. BGP uses TCP as the transport layer protocol with a port number of 179.
C. BGP stability is ensured by the high reliability of TCP, not by its own mechanism.
D. BGP sends only updated routing information, thereby saving a large amount of bandwidth resources.
Answer:
A
User Votes:
A
50%
B
50%
C
50%
D
50%
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0/ 1000
Question 8
Which of the following methods does not support traffic importing to the MPLS TE tunnel?
A. Static routing
B. Dynamic routing
C. Automatic routing
D. Policy-based routing
Answer:
D
User Votes:
A
50%
B
50%
C
50%
D
50%
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0/ 1000
Question 9
Which of the following statements are true about the meaning of the peer 20.1.1.2 allow-as-loop 2 command? (Multiple Choice)
A. The local AS number can be repeated in the AS_Path attribute in the received routes.
B. 2 indicates the number of times the AS number can be repeated.
C. This command can only be used on EBGP peers.
D. By default, the number of times the AS number is allowed to be duplicated is 1.
Answer:
CD
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 10
Which statement about BGP is true?
A. BGP is used in ASs or between ASs to transmit and control routing information.
B. BGP is used in an AS to discover paths.
C. BGP is directly carried in IP packets.
D. BGP must establish peer relationships based on direct links.
Answer:
A
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 11
In BGP, which of the following are methods for loop avoidance?
A. The Origin attribute of a route records the source from which the route was imported
B. In a route's AS-Path attribute, all ASs along the path are recorded.
C. In the next-hop attribute of a route, the route's next hop is recorded.
D. The MED attribute of a route affects the outbound interface selection of another AS.
Answer:
B
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 12
For a router that runs BGP4, which of the following statements is not true?
A. When multiple paths exist, BGP4 selects the optimal path.
B. BGP4 notifies the routes obtained from EBGP to all its BGP peers.
C. BGP4 advertises to BGP peers only the routes it uses.
D. BGP4 notifies the routes obtained from IBGP to all its BGP peers.
Answer:
C
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 13
What kind of BGP packet contains routing information?
A. Open
B. Update
C. Keepalive
D. Notification
Answer:
A
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 14
What kind of packet is used by BGP to transmit version number and AS number information?
A. Open
B. Update
C. Keepalive
D. Notification
Answer:
D
User Votes:
A
50%
B
50%
C
50%
D
50%
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Question 15
Which of the following statements are true about the DIS in IS-IS? (Multiple Choice)
A. A DIS creates and updates pseudo nodes on a broadcast network.
B. DIS election is unpredictable.
C. When all IS priorities are the same within a LAN, the IS with the largest MAC address is elected as the DIS.
D. DIS election on a broadcast network is held in preemption mode.