H31-611 Online Practice Questions and Answers

Which of the following descriptions are true about SDN? (Choose all that apply.)

A. SDN is OpenFlow.

B. SDN supports forwarding-control separation.

C. SDN provides programmable open interfaces.

D. SDN is short for software-defined networking.

In the SDN RR+ solution, the AC can provide which of the following functions? (Choose all that apply.)

A. Calculates optimal paths globally based on multiple constraints.

B. Pre-defines BGP routing policies.

C. Generates BGP routes/policies and applies them to devices.

D. Manages topology and BGP relationships

Which of the following statements is true about proxy ARP?

A. Proxy ARP allows a gateway directly connected to the host to use its own MAC address to reply to ARP requests in place of destination host.

B. Proxy ARP allows a gateway directly connected to the host to help the destination host to transmit ARP packets across VLANs.

C. Proxy ARP is used for communication within a VLAN.

D. Proxy ARP means to buy the permission to use ARP packets from a proxy.

Which of the following factors does not affect the performance of the SDN network?

A. Network congestion

B. Routing loop

C. Access loop

D. Access control list

E. Non-optional route

During SDN network fault locating, which of the following commands can be used to collect basic runtime information for datacom devices?

A. display version

B. display diagnostic-information

C. display log

D. display current-configuration

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

Which of the following statements about BGP are true? (Choose all that apply.)

A. BGP calculates and discovers the optimal route.

B. BGP uses TCP as the transport layer protocol with a port number of 170.

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.

On an SDN network, OpenFlow connection backup data mainly includes which of the following? (Choose all that apply.)

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

Which of the following network entities can send SNMP GetRequest packets?

A. Agent

B. Client

C. NMS

Which of the following statements about NetStream logs are true? (Choose all that apply.)

A. NetStream logs have V5, V8, and V9 formats. The difference between V5 and V9 is that V5 is fixed and does not support traffic aggregation, whereas V9 supports traffic aggregation and data format customization.

B. NetStream packets use UDP encapsulation and unlike SFlow, NetStream does not support traffic sampling.

C. A field within NetStream packets can distinguish whether traffic is inbound or outbound.

D. The start time of a NetStream flow is the time that elapses between January 1, 1970 at 00:00:00 to the moment the flow is created and expressed in seconds.