Juniper JN0-649リアル試験問題解答は無料
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JN0-649試験は65の複数選択の質問で構成されており、候補者は試験を完了するために120分を与えられます。この試験は、候補者がエンタープライズルーティングとスイッチングテクノロジーについての理解、およびJuniper Networksデバイスを構成およびトラブルシューティングする能力をテストするように設計されています。この試験は、英語、日本、中国語など、いくつかの言語で利用できます。
質問 # 19
Click the Exhibit.
You have a workstation and VoIP phone connected to port ge-0/0/1 on an access switch.
Referring to the configuration shown in the exhibit, which statement is true?
- A. All frames that leave the switch on interface ge-0/0/1 will be dropped.
- B. Untagged frames that enter the switch on interface ge-0/0/1 will be dropped.
- C. The phone will not be able to communicate over the network.
- D. The phone will require a manual VLAN ID configuration.
正解：D
質問 # 20
What are two similarities between OSPFv2 and OSPFv3? (Choose two.)
- A. protocol processing per link, not per subnet
- B. 32-bit router ID
- C. support for multiple instances per link
- D. virtual links
正解：B、D
質問 # 21
Referring to the exhibit, which statement is correct?
- A. The route is learned from a multipath BGP session.
- B. The route is learned from only one neighbor.
- C. The route is learned from three different neighbors.
- D. The route is learned from a multihop BGP session.
正解：B
質問 # 22
You are configuring MVRP for automatic VLAN registration. Which two statements are true?
(Choose two.)
- A. MVRP must be configured on all trunk ports
- B. the trunk port must not be configured with vlan members
- C. the trunk port must be configured with "vlan all"
- D. MVRP must be configured on all access ports
正解：A、B
質問 # 23
You are implementing the route summarization feature of OSPF. Which two results do you achieve in this scenario? (Choose two.)
- A. It provides optimal routing in the network.
- B. It reduced the routing table size, enabling devices to store and process less information.
- C. It helps in migrating to future multi-area OSPF network designs.
- D. It reduces the impact of topology changes on a device.
正解：B、D
質問 # 24
You are implementing a single spanning tree instance in your network and want to use the protocol that will give you the best convergence time in the event of a physical network failure of the root bridge. Which spanning tree protocol will satisfy this requirement?
- A. MSTP
- B. VSTP
- C. RSTP
- D. STP
正解：C
解説：
STP and RSTP are limited to a single instance on any physical interface. Use the interface (Spanning Tree) statement to configure interfaces to participate in the STP or RSTP instance.
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/spanning-tree-instances- interfaces.html
質問 # 25
You are asked to enforce user authentication using a captive portal before users access the corporate network.
Which statement is correct in this scenario?
- A. HTTPS is the default protocol for a captive portal.
- B. A captive portal can be bypassed using an allowlist command containing a device's IP address.
- C. All Web browser requests are redirected to the captive portal until authentication is successful.
- D. When enabled, a captive portal must be applied to each individual interface.
正解：C
解説：
You can set up captive portal authentication on your switch to redirect all Web browser requests to a login page that requires users to input a username and password before they are allowed access. Upon successful authentication, users are allowed access to the network and redirected to the original page requested. Junos OS provides a customizable template for the captive portal window that allows you to easily design and modify the look of the captive portal login page. You can modify the design elements of the template to change the look of your captive portal login page and to add instructions or information to the page. You can also modify any of the design elements of a captive portal login page. The first screen displayed before the captive login page requires the user to read the terms and conditions of use. By clicking the Agree button, the user can access the captive portal login page. https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/user-authentication-captive-portal.html
質問 # 26
A BGP network has been designed to provide resiliency and redundancy to a multihomed customer network.
Which two statements are correct in this scenario? (Choose two.)
- A. A routing policy will be required to forward traffic to both next hops.
- B. Both the next hops will be used to forward traffic to R2.
- C. The TTL value of 1 is set to limit the scope of the EBGP session.
- D. The ttl statement must be configured to accommodate peering to a loopback address of a directly connected peer.
正解：A、D
質問 # 27
You are troubleshooting an EVPN-VXLAN IP fabric and observe the loop shown in the exhibit.
Which two steps would you take to further troubleshoot this problem? (Choose two.)
- A. Verify that the same ESI is configured on the link from the host and that it matches the source.
- B. Issue the show route table bgp.evpn.0 command on Leaf2 and verify that Type 3 routes are present.
- C. Issue the show route table bgp.evpn.0 command on Leaf2 and verify that Type 4 routes are present.
- D. Verify that the same ESI is configured on the two links from the source.
正解：B、C
質問 # 28
Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?
- A. The switch5 device will send a Type 4 route to all peers.
- B. The switch5 device will send a Type 1 route to all peers.
- C. The switch5 device will send a Type 3 route to all peers.
- D. The switch5 device will send a Type 2 route to all peers.
正解：C
質問 # 29
What are two supported PoE management modes? (Choose two.)
- A. static
- B. standalone
- C. class
- D. mixed
正解：A、C
質問 # 30
Which three statements are correct about EVPN route types? (Choose three.)
- A. Type 1 routes carry endpoint MAC address information.
- B. Type 3 routes carry replication information.
- C. Type 2 routes carry endpoint IP address information.
- D. Type 2 routes carry endpoint MAC address information.
- E. Type 5 routes carry replication information.
正解：A、C、D
質問 # 31
The connection between DC1 and DC2 is routed as shown in the exhibit.
In this scenario, which statement is correct?
- A. L3VPN must be enabled to advertise reachability.
- B. The border devices must be able to perform Layer 3 routing and provide IRB functionality.
- C. Type 2 and Type 5 routes will be exchanged between DC1 and DC2.
- D. An IP prefix route provides encoding for intra-subnet forwarding.
正解：B
解説：
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/concept/evpn-route-type5-understanding.html
質問 # 32
Referring to the exhibit, a PIM-SM network is set up to enable communication between multicast devices.
Which two statements are true? (Choose two.)
- A. Before the formation of the rendezvous-point tree, an IGMP is sent from the Source to R5.
- B. Before the formation of the rendezvous-point tree, an IGMP is sent from the Receiver to R1.
- C. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R5.
- D. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R3.
正解：A、B
質問 # 33
You are using 802.1X authentication in your network to secure all ports. You have a printer that does not support 802.1X and you must ensure that traffic is allowed to and from this printer without authentication.
In this scenario, what will satisfy the requirement?
- A. static MAC bypass
- B. MAC filtering
- C. MACsec
- D. MAC RADIUS
正解：A
解説：
https://www.juniper.net/documentation/us/en/software/junos/user-access/topics/topic-map/static-mac-bypass-mac-radius-authentication.html
質問 # 34
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The host that the route is associated with is multihomed to two leaf nodes.
- B. The route is a Type 1 EVPN route.
- C. The host that the route is associated with is single-homed to one leaf node.
- D. The route is a Type 2 EVPN route.
正解：C、D
質問 # 35
Referring to the exhibit, a PIM-SM network is set up to enable communication between multicast devices.
Which two statements are true? (Choose two.)
- A. Before the formation of the rendezvous-point tree, an IGMP is sent from the Source to R5.
- B. Before the formation of the rendezvous-point tree, an IGMP is sent from the Receiver to R1.
- C. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R5.
- D. Before the formation of the rendezvous-point tree, a join message is sent from R1 to R3.
正解：A、B
質問 # 36
You are asked to configure 802.1X on your access ports to allow only a single device to authenticate. In this scenario, which configuration would you use?
- A. single-secure supplicant mode
- B. MAC authentication mode
- C. multiple supplicant mode
- D. single supplicant mode
正解：D
質問 # 37
Click the Exhibit.
You have just configured on an OSPF adjacency between two routers. After you commit the configuration, you notice that your adjacency is not up.
Referring to the exhibit, what would cause the problem?
- A. You must configure lo on R2.
- B. You must configure bfd on R2.
- C. You must configure on interface-type o n R2.
- D. You must configure hello and dead intervals on R1.
正解：C
質問 # 38
Your enterprise network uses routing instances to support multitenancy. Your Junos devices use BGP to peer to multiple BGP devices. You must ensure that load balancing is achieved within the routing instance.
Which two statements would accomplish this task? (Choose two.)
- A. Configure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.
- B. Configure the multipath option at the [edit protocols bgp group <group-name> neighbor] hierarchy.
- C. Configure a load-balance per-packet policy and apply it at the [edit routing-options forwarding- table] hierarchy.
- D. Configure the multipath option at the [edit protocols bgp group] hierarchy.
正解：A、D
質問 # 39
You have PIM SM multicast configure and running in a network environment comprised of EX4300 devices. Your customer report increased delay when switching channels using IPTV. To help decrease the delay, you implement PIM join balancing. You add the set protocol pim join- load-balance command to the configuration. After committing, you notice that the flows are still using one path.
In this scenario, which statement is correct?
- A. IGMP snooping must be configured.
- B. The interface must be specified to use for load balancing
- C. PIM join load-balancing also be configured.
- D. The clear pim join-distribution command must be issued.
正解：D
質問 # 40
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