[2023年10月29日] JN0-649 PDF問題とテストエンジンには65問があります
更新された試験エンジンはJN0-649試験無料お試しサンプル365日更新されます
質問 # 34
Which three databases are used by the Dijkstra algorithm? (Choose three.)
- A. Tree database
- B. Link State Database
- C. Configuration database
- D. Candidate database
- E. MAC database
正解：A、B、D
質問 # 35
Your enterprise network is running BGP VPNs to support multitenancy. Some of the devices with which you peer BGP do not support the VPN NLRI. You must ensure that you do not send BGP VPN routes to the remote peer.
Which two configuration steps will satisfy this requirement? (Choose two.)
- A. Configure the apply-vpn-export feature on the local BGP peer.
- B. Configure an export policy on the local BGP peer to reject the VPN routes being sent to the remote peer.
- C. Configure an import policy on the remote peer to reject the routes when they are received.
- D. Configure a route reflector for the VPN NLRI.
正解：A、B
解説：
Apply both the VRF export and BGP group or neighbor export policies (VRF first, then BGP) before routes from the vrf or l2vpn routing tables are advertised to other PE routers.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/vpn-apply-export-edit-protocols-bgp-vp.html
質問 # 36
Which two statements about MVRP are correct? (Choose two.)
- A. MVRP monitors interfaces using VSTP and dynamically creates VLANs as necessary
- B. MVRP is enabled by adding trunk ports under the [edit protocols mvrp] hierarchy.
- C. MVRP PDUs are sent to other switches as periodic intervals.
- D. MVRP can propagate dynamic VLANs created on one switch to another switch
正解：B、C
質問 # 37
You have configured 802.1X single supplicant mode on the access switch. The VoIP phone does not support 802.1X authentication.
Referring to the exhibit, which statement is true?
- A. The VoIP phone will be able to communicate over the network after the workstation authenticates.
- B. Authentication must be changed to multiple supplicant mode for this solution to work.
- C. The VoIP phone will not be able to communicate over the network.
- D. MAC bypass must be configured for the VoIP phone for this solution to work.
正解：A
質問 # 38
You are asked to merge a RIP network with your OSPF network. As a first step, you establish connectivity between the RIP network and the OSPF network. The RIP network connects to an NSSA area. Which two statements are true in this scenario? (Choose two.)
- A. To share RIP routes with the OSPF network, an export policy will be required on the ASBR.
- B. Be default, RIP routes have a higher route preference than external OSPF routes.
- C. To share RIP routes with the OSPF network, an export policy will be required on the ABR.
- D. By default, external OSPF routes have a higher route preference than RIP routes.
正解：A、D
解説：
Route Preference Values
OSPF Internal = 10
RIP = 100
OSPF External = 150
質問 # 39
You want to view the VLANs that have been created dynamically using MVRP. Which operational mode command will display this information?
- A. Show mvrp applicant-state
- B. Show mvrp dynamic-vlan memberships
- C. Show mvrp interface
- D. Show mvrp registration-state
正解：B
質問 # 40
Which statement is correct about IS-IS?
- A. Level 2 routers must share the same area address.
- B. Level 1/2 routers automatically inject a default route to the nearest Level 1 router.
- C. Level 1 routers route traffic between autonomous systems.
- D. IS-IS uses areas and an autonomous system.
正解：D
質問 # 41
A Layer 2 connection does not expend across data centers. The IP subnet in a Layer 2 domain is confined within a single data center.
Which EVPN route type is used to communicate prefixes between the data centers?
- A. Type 1
- B. Type 2
- C. Type 5
- D. Type 4
正解：C
解説：
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/concept/evpn-route-type5-understanding.html#:~:text=In%20the%20control%20plane%2C%20EVPN,subnet%20connectivity%20across%20data%20centers.
質問 # 42
Your EX Series switch has IP telephones and computers connected to a single switch port. You are considering implementing the voice VLAN feature to help with this setup. In this scenario, which two statements are correct? (Choose two.)
- A. The interfaces must be configured as access ports.
- B. Assigning the incoming voice and data traffic to separate VLANs enables the ability to prioritize the traffic using CoS.
- C. The voice VLAN feature must be used with LLDP-MED to associate VLAN ID and 802.1p values with the traffic.
- D. The voice VLAN feature will enable incoming tagged data and voice traffic to be associated with separate VLANs.
正解：A、B
質問 # 43
You recently committed a change to a router to reject OSPF routes sourced from area 10.
However, you are still seeing area 10 routes in the routing table. Referring to the exhibit, which statement is correct?
- A. The OSPF protocol is first matched by find-ospf and accepted.
- B. The routes remain in the table until the routing daemon is restarted.
- C. The routes only timeout after 24 hours.
- D. The routes remain in the table until the device is rebooted.
正解：B
質問 # 44
Referring to the exhibit, which statement is true?
- A. R1 has the B bit set.
- B. R1 is a backbone router.
- C. R1 is an ASBR.
- D. R1 is an ABR.
正解：C
質問 # 45
A customer on MSTI-2 was isolated due to a physical link outage on Switch 5's ge-0/0/32 interface.
Referring to the exhibit, which corrective action would solve this problem?
- A. replace the link between Switch 5 and 6 with a 10 Gbps link
- B. Add MSTI-2 to all interfaces on Switch 5.
- C. Implement the CIST on all switches.
- D. Move the root bridge for MSTI-2 to Switch 6.
正解：B
質問 # 46
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The DS-1 switch will be root bridge for MSTI 1.
- B. The DS-2 switch will be root bridge for MSTI 1.
- C. The DS-1 switch will be root bridge for MSTI 2.
- D. The DS-2 switch will be root bridge for MSTI 2.
正解：B、C
解説：
Bridge priority is to determine which bridge becomes the designated bridge.
質問 # 47
Which statement is correct about CoS policers on Junos devices?
- A. A policer does not alter in-profile traffic.
- B. Traffic that exceeds a policer's traffic profile can be dropped or assigned to a specific drop profile.
- C. Policers can be configured to buffer traffic that exceeds the policer's traffic profile.
- D. A policer can assign in-profile traffic to a specific forwarding class.
正解：B
質問 # 48
Click the Exhibit.
The Receiver is attempting to join two different groups, one from each source. You want to endure that load balancing is taking place.
Referring to the exhibit, which statement is true?
- A. R2 must have join-load-balance configured under protocol PIM.
- B. R1 must have join-load-balance configured under protocol PIM.
- C. R4 must have join-load-balance configured under protocol PIM.
- D. R3 must have join-load-balance configured under protocol PIM.
正解：C
解説：
https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/mcast-pim-join- load-balance.html
質問 # 49
Which two port modes are associated with STP? (Choose two.)
- A. backup port
- B. root
- C. alternate port
- D. designated
正解：B、D
質問 # 50
Which two statements are correct regarding the behavior shown in the exhibit? (Choose two.)
- A. The router is an ABR.
- B. The router is not an ABR.
- C. The ge-1/1/0 interface is configured as secondary for Area 0.
- D. The ge-1/1/0 interface is configured as secondary for Area 100.
正解：A、D
質問 # 51
BGP multipath or multihop are not configured in your network. In this scenario, what is the correct sequence for BGP active route selection?
- A. higher local preference
shortest AS path
lowest router ID
lowest peer address
lower origin code - B. higher local preference
shortest AS path
lowest peer address
lowest router ID
lower origin code - C. higher local preference
lowest router ID
lowest peer address
lower origin code
shortest AS path - D. higher local preference
shortest AS path
lower origin code
lowest router ID
lowest peer address
正解：A
質問 # 52
Which two authentication methods are available for OSPF on Juniper devices? (Choose two.)
- A. none
- B. Certificate
- C. RSA
- D. MD5 authentication
正解：A、D
質問 # 53
Referring to the exhibit, ServerA sends a single IP packet destined to 10.0.0.127. Which two statements correctly describe the behavior of the resulting outbound VXLAN packets that contain the original packet destined to 10.0.0.127? (Choose two.)
- A. Router E will replicate and send a copy of the received VXLAN packet to router D.
- B. Router C will send a VXLAN packet destined only to router D and router E.
- C. Router C will send a single VXLAN packet to one remote VTEP.
- D. Router D will not replicate and send a copy of the received VXLAN packet to router E.
正解：A、C
質問 # 54
Click the Exhibit button.
Referring to the exhibit, the source is currently sending multicast traffic using group 224.1.1.1, which is being received by R1. R2 is not receiving PIM register messages.
What would be the cause of this problem?
- A. All routers have not been configured with the same Auto-RP discovery group.
- B. R5 has not received an IGMP report of 224.1.1.1.
- C. Tunnel services have not been enabled on R1.
- D. A(*,G) tree has not been built yet.
正解：C
解説：
The multicast traffic being sent by the source must be encapsulated into a PIM register packet. If the tunneling services under the chassis stanza is not configured, a PE (PIM Encapsulation interface) will not be present in the multicast first hop router. Anyway long story short, tunneling services must be turned on or else you will not get PIM register messages sent to the RP.
https://kb.juniper.net/InfoCenter/index?page=content&id=KB13329
質問 # 55
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