JN0-351問題集、Juniper実際の試験問題

質問 1

In addition to the MAC addresses, what information is stored in the bridging table? (Choose two.)

A. interface details

B. MAC learned time

C. preamble of Ethernet packet

D. ether type details

正解: A,B

解説: (PassTest メンバーにのみ表示されます)

質問 2

What are two characteristics of RSTP alternate ports? (Choose two.)

A. RSTP alternate ports provide an alternate lower cost path to the root bridge.

B. RSTP alternate ports block traffic while receiving superior BPDUs from a neighboring switch.

C. RSTP alternate ports provide an alternate higher cost path to the root bridge.

D. RSTP alternate ports are active ports used to forward frames toward the root bridge.

正解: B,C

解説: (PassTest メンバーにのみ表示されます)

質問 3

Which three statements are correct about OSPF packet types? (Choose three.)

A. Hello packets are sent every 30 seconds by default.

B. Link-state update packets contain one or more LSAs.

C. Database description packets are used during the adjacency formation process.

D. Link-state acknowledgment packets are sent every 30 seconds.

E. Link-state request packets are sent after receiving an LSA header not in the OSPF database.

正解: B,C,E

質問 4

Which two statements are correct about link aggregation? (Choose two.)

A. IP traffic is hashed using source and destination MAC addresses

B. LAGs provide physical layer redundancy.

C. All RE-generated traffic traverses the lowest member link.

D. Member links must use the same MTU.

正解: B,D

質問 5

You deployed a new EX Series switch with DHCP snooping enabled and you do not see any entries in the snooping databases for an interface. Which two Juniper configurations for that interface caused this issue?
(Choose two.)

A. The interface is configured as a disabled port.

B. MAC limiting is enabled on the interface.

C. The interface is configured as a trunk port.

D. Dynamic ARP inspection is enabled on the interface.

正解: A,C

質問 6

Your network has two ISPs available. You want to ensure that all outbound traffic is routed out ISP-1. If the connection to ISP-1 fails, all outbound traffic is routed to the backup ISP ISP-2. In this scenario, how should you configure BGP on your network?

A. Configure the gateway for ISP-1 with a higher peer ID than the gateway for ISP-2.

B. Configure the gateway for ISP-1 with a higher origin code than the gateway for ISP-2.

C. Set the local-preference attribute to a higher value for ISP-1 than ISP-2.

D. Set the local-preference attribute to a higher value tor ISP-2 than ISP-1.

正解: C

質問 7

You want to use filter-based forwarding (FBF) on your Internet peering router to load-balance traffic to two directly connected ISPs based on the source address.
Which two statements are correct in this scenario? (Choose two.)

A. RIB groups are used to hide routes in the inet. 0 routing table.

B. FBF uses the no-forwarding routing instance type.

C. RIB groups are used to copy routes from the inet. o routing table.

D. FBF uses the forwarding routing instance type.

正解: C,D

解説: (PassTest メンバーにのみ表示されます)

質問 8

What is a purpose of using a spanning tree protocol?

A. to look up MAC addresses

B. to route IP packets

C. to tunnel Ethernet frames

D. to eliminate broadcast storms

正解: D

解説: (PassTest メンバーにのみ表示されます)

質問 9

Which three actions are required for filter-based forwarding? (Choose three.)

A. Create routing policies for source addresses.

B. Create a firewall filter to match desired traffic.

C. Create routing instances for individual destinations.

D. Create a RIB group for next-hop entries.

E. Create a forwarding option for load balancing.

正解: A,B,D

質問 10

You have DHCP snooping enabled but no entries are automatically created in the snooping database for an interface on your EX Series switch. What are two reasons for the problem? (Choose two.)

A. The device that is connected to the interface has performed a DHCPRELEASE.

B. MAC limiting is enabled on the interface.

C. The device that is connected to the interface has a static IP address.

D. Dynamic ARP inspection is enabled on the interface.

正解: B,C

解説: (PassTest メンバーにのみ表示されます)

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) - JN0-351 模擬練習