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質問 1：
SDN technology advocate layered open architecture. Then which organization advocate and defines the centralized architecture and Open Flow?
A. ETSI
B. IETF
C. ONF
D. ITU
正解：C
質問 2：
Simple traffic classification uses the DSCP priority of IP packets, the EXP priority of MPLS packets, and 802.1p priority of VLAN packets.
A. TRUE
B. FALSE
正解：A
質問 3：
In the SDN network architecture, which device is used to calculate the path and deliver the flow table?
A. Controller
B. Application server
C. Orchestrator
D. Device
正解：A
質問 4：
Which of the following is not the advantage of NAT?
A. NAT allows many hosts of the LAN to share one IP address for Internet access.
B. NAT can shield internal network address translation and improves the security of the internal network.
C. NAT allows network users with private IP addresses to easily access the Internet.
D. NAT can process IP packet encryption.
正解：D
質問 5：
What are the authentication domains of the Agile Controller? (Multiple Choice)
A. Post-authentication domain
B. Quarantine domain
C. Authentication domain
D. Pre-authentication domain
正解：A,B,D
質問 6：
On a carrier's MPLS VPN network, PE1 and PE2 transmit data packets between VPNs. After PE1 receives VPN route 172.16.1.0/24 from a client, it converts the route into a VPNv4 route and distributes label 1027 to the packet. After the packet arrives at PE2, PE2 distributes label 1025 to the packet.
When a client on PE2 accesses this route, what are the outer and inner labels in the packet transmitted over the carrier network?
A. Outer label: 1025; inner label: 1027
B. Outer label: 1027; inner label: 1025
C. Outer label: 1027; inner label: 1027
D. Outer label: 1025; inner label: 1025
正解：A
質問 7：
What is the default sending interval of BFD packets?
A. 100ms
B. 10s
C. 1000ms
D. 5s
正解：C
質問 8：
The following describes the configuration on a PE.
Which of the following statements is true?
A. Two VPN clients connected to the PE use the BGP protocol to exchange routes with the PE.
B. The PE is connected to two CEs of the customer network. One is set to VPN1 and the other is set to VPN3.
C. The peer PE is in AS 500 and has an EBGP neighbor relationship with the local PE.
D. The local PE establishes a BGP peer relationship with the remote PE through a directly-connected interface.
正解：A
質問 9：
MPLS uses LDP to provide different label distribution modes.
Which of the following statements regarding LDP label distribution control modes are false? (Multiple Choice)
A. In ordered mode, when an [SR is the origin of a route, it can send label mapping messages to the upstream router initiatively and does not need to wait for label mapping messages from the next hop LSR.
B. LDP label distribution cannot be controlled in independent mode.
C. LDP label distribution can be controlled in ordered mode.
D. In independent mode, an [SR cannot send label mapping messages to the upstream router before it receives label mapping messages from the next hop LSR.
正解：B,D
SDN technology advocate layered open architecture. Then which organization advocate and defines the centralized architecture and Open Flow?
A. ETSI
B. IETF
C. ONF
D. ITU
正解：C
質問 2：
Simple traffic classification uses the DSCP priority of IP packets, the EXP priority of MPLS packets, and 802.1p priority of VLAN packets.
A. TRUE
B. FALSE
正解：A
質問 3：
In the SDN network architecture, which device is used to calculate the path and deliver the flow table?
A. Controller
B. Application server
C. Orchestrator
D. Device
正解：A
質問 4：
Which of the following is not the advantage of NAT?
A. NAT allows many hosts of the LAN to share one IP address for Internet access.
B. NAT can shield internal network address translation and improves the security of the internal network.
C. NAT allows network users with private IP addresses to easily access the Internet.
D. NAT can process IP packet encryption.
正解：D
質問 5：
What are the authentication domains of the Agile Controller? (Multiple Choice)
A. Post-authentication domain
B. Quarantine domain
C. Authentication domain
D. Pre-authentication domain
正解：A,B,D
質問 6：
On a carrier's MPLS VPN network, PE1 and PE2 transmit data packets between VPNs. After PE1 receives VPN route 172.16.1.0/24 from a client, it converts the route into a VPNv4 route and distributes label 1027 to the packet. After the packet arrives at PE2, PE2 distributes label 1025 to the packet.
When a client on PE2 accesses this route, what are the outer and inner labels in the packet transmitted over the carrier network?
A. Outer label: 1025; inner label: 1027
B. Outer label: 1027; inner label: 1025
C. Outer label: 1027; inner label: 1027
D. Outer label: 1025; inner label: 1025
正解：A
質問 7：
What is the default sending interval of BFD packets?
A. 100ms
B. 10s
C. 1000ms
D. 5s
正解：C
質問 8：
The following describes the configuration on a PE.
Which of the following statements is true?
A. Two VPN clients connected to the PE use the BGP protocol to exchange routes with the PE.
B. The PE is connected to two CEs of the customer network. One is set to VPN1 and the other is set to VPN3.
C. The peer PE is in AS 500 and has an EBGP neighbor relationship with the local PE.
D. The local PE establishes a BGP peer relationship with the remote PE through a directly-connected interface.
正解：A
質問 9：
MPLS uses LDP to provide different label distribution modes.
Which of the following statements regarding LDP label distribution control modes are false? (Multiple Choice)
A. In ordered mode, when an [SR is the origin of a route, it can send label mapping messages to the upstream router initiatively and does not need to wait for label mapping messages from the next hop LSR.
B. LDP label distribution cannot be controlled in independent mode.
C. LDP label distribution can be controlled in ordered mode.
D. In independent mode, an [SR cannot send label mapping messages to the upstream router before it receives label mapping messages from the next hop LSR.
正解：B,D
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