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2024年最新のの問題JN0-649問題集で更新されたJuniper試験問題集を試そう
質問 # 60
Referring to the exhibit, which statement is correct?
- A. The route is learned from a multihop BGP session.
- B. The route is learned from a multipath BGP session.
- C. The route is learned from three different neighbors.
- D. The route is learned from only one neighbor.
正解：D
質問 # 61
Which address range is used for source-specific multicast?
- A. 224.2.0.0/16
- B. 233.0.0.0/8
- C. 239.0.0.0/8
- D. 232.0.0.0/8
正解：D
質問 # 62
Which statement is correct about CoS policers on Junos devices?
- A. Policers can be configured to buffer traffic that exceeds the policer's traffic profile.
- B. A policer can assign in-profile traffic to a specific forwarding class.
- C. Traffic that exceeds a policer's traffic profile can be dropped or assigned to a specific drop profile.
- D. A policer does not alter in-profile traffic.
正解：C
質問 # 63
Router R1, in peer AS 65001, advertises routes to R2 using EBGP. R2 advertises the routes learned from R1 to R3 using IBGP.
Referring to the exhibit, to which routers will R3 advertise the BGP routes received from R2?
- A. R2, R4, R5, R6, R7
- B. R4, R5, R6, R7
- C. R6, R7
- D. R4, R5
正解：D
質問 # 64
You enable the Multiple VLAN Registration Protocol (MVRP) to automate the creation and management of virtual LANs.
Which statement is correct in this scenario?
- A. MVRP works with RSTP and VSTP.
- B. Timers dictate when link state changes are propagated.
- C. When enabled, MVRP affects all interfaces.
- D. The forbidden mode does not register or declare VLANs.
正解：D
解説：
The forbidden mode does not register or declare VLANs. You can change the registration mode of a specific interface to forbidden. An interface in forbidden registration mode does not participate in MVRP even if MVRP is enabled on the switch.
https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topic-map/mvrp.html MVRP is disabled by default on the switches and, when enabled, affects only trunk interfaces. Once you enable MVRP, all VLAN interfaces on the switch belong to MVRP (the default normal registration mode) and those interfaces accept PDU messages and send their own PDU messages. forbidden-The interface does not register or declare VLANS (except statically configured VLANs).
質問 # 65
Referring to the configuration shown in the exhibit, how many of the routes received from 10.0.0.2 will be active in the routing table?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 66
Referring to the exhibit, traffic ingresses on interface ge-0/0/3 and egresses on interface ge-0/0/4.
Which queue does traffic with the IP precedence value of 100 use?
- A. expedited-forwarding
- B. assured-forwarding
- C. best-effort
- D. network-control
正解：A
質問 # 67
You are running OSPF as your IGP. The interfaces connecting two routers are in the ExStart state. You notice that something is incorrect with the configuration. Referring to the exhibit, which statement is correct?
- A. The IP addresses are incorrect.
- B. The MTU setting are incorrect.
- C. The subnet mask is incorrect.
- D. The interface type is incorrect.
正解：B
質問 # 68
What information is contained in an OSPF LSA header? (Choose two.)
- A. subnet mask
- B. options
- C. protocol
- D. length
正解：B、D
質問 # 69
Which two statements about OSPF routing policies are correct? (Choose two.)
- A. By default, OSPF import policies accept network-summary LSAs.
- B. By default, OSPF export policies accept network-summary LSAs.
- C. By default, OSPF import policies reject network-summary LSAs.
- D. By default, OSPF export policies reject network-summary LSAs.
正解：A、D
質問 # 70
You are asked to configure an 802.1X solution that supports dynamic VLAN assignment. In this scenario, which two modes support using vendor-specific attributes (VSAs)? (Choose two.)
- A. static MAC bypass mode
- B. single supplicant mode
- C. multiple supplicant mode
- D. single-secure supplicant mode
正解：C、D
質問 # 71
Your network is multihomed to two ISPs. The BGP sessions are established; however, the ISP peers are not receiving any routes.
Which two statements are correct about troubleshooting your configuration? (Choose two.)
- A. Verify the import policies on your router.
- B. Verify the export policies on your router.
- C. Verity that the multihop settings are configured on your router.
- D. Verify that the BGP routes are active in your routing table.
正解：B、C
質問 # 72
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 protocols bgp group <group-name> neighbor] hierarchy.
- B. Configure a load-balance per-packet policy and apply it at the [edit routing-options forwarding- table] hierarchy.
- C. Configure the multipath option at the [edit protocols bgp group] hierarchy.
- D. Configure the multipath option at the [edit routing-instances <instance-name> routing-options] hierarchy.
正解：C、D
質問 # 73
Your organization has recently acquired another company. You must carry all of the company's existing VLANs across the corporate backbone to the existing branch locations without changing addressing and with minimal configuration.
Which technology will accomplish this task?
- A. EVPN-VXLAN anycast gateway
- B. Q-in-Q all-in-one bundling
- C. MVRP registration normal
- D. PVLAN isolated VLAN
正解：B
解説：
Technology Overview:
* Q-in-Q (802.1ad), also known as VLAN stacking, allows multiple VLAN tags to be inserted into a single frame. This enables the carrying of multiple VLANs across a single backbone, preserving the original VLAN tags across different network segments.
Application in Scenario:
* By using Q-in-Q, the existing VLANs of the acquired company can be encapsulated within a single VLAN tag. This technique is highly efficient for carrying VLANs across a corporate backbone without altering the existing addressing scheme and with minimal configuration changes.
Configuration Example:
* Juniper Configuration:
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set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-id 100
set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-id-list 100-200 set interfaces ge-0/0/2 unit 0 family ethernet-switching vlan-id 300 set interfaces ge-0/0/2 unit 0 family ethernet-switching vlan-id-list 300-400
* This setup ensures that VLANs 100-200 on interface ge-0/0/1 and VLANs 300-400 on interface ge-0/0/2 are bundled together, achieving the desired encapsulation.
References:
* Detailed configuration and benefits are documented in the "network-mgmt.pdf" file, which outlines the necessary steps and considerations for deploying Q-in-Q.
質問 # 74
You are troubleshooting connectivity between an EVPN spine switch configured as a route reflector and a leaf node with an IP address of 10.30.100.6.
Referring to the exhibit, what is the problem?
- A. The leaf node is not configured for the family evpn NLRI.
- B. The spine node is not configured for the family inet NLRI.
- C. The neighbor 10.30.100.6 statement is missing from spine1's configuration.
- D. The neighbor 10.30.100.3 statement is missing from leaf1's configuration.
正解：A
解説：
* The leaf node is not configured for the family evpn NLRI (D):
* The exhibit shows that there is an unsupported capability NP error for AFI 1, SAFI 70. This indicates that the leaf node is not configured to support the EVPN (Ethernet VPN) address family.
References:
* The BGP configuration and troubleshooting details can be found in "Juniper Commands.pdf" and related EVPN configuration documents.
質問 # 75
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 not be able to communicate over the network.
- B. MAC bypass must be configured for the VoIP phone for this solution to work.
- C. The VoIP phone will be able to communicate over the network after the workstation authenticates.
- D. Authentication must be changed to multiple supplicant mode for this solution to work.
正解：C
質問 # 76
You are troubleshooting a BGP connection.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The 192.168.1.5 peer has a misconfigured MD5 key.
- B. Packet fragmentation is preventing the session from establishing.
- C. The 192.168.1.4 peer has a misconfigured autonomous system number.
- D. The ge-0/0/1 interface is disabled.
正解：A、C
解説：
* Step 1: Check the error messages in the log.
The log messages indicate:
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Dec 22 19:22:29 router rpd[7394]: bgp_process_open:4185: NOTIFICATION sent to 192.168.1.4 (Internal AS 65000): code 2 (Open Message Error) subcode 2 (bad peer AS number), Reason: peer 192.168.1.4 (Internal AS 65000) claims 65100, 65000 configured Dec 22 19:22:33 router rpd[7394]: bgp_pp_recv:4788: NOTIFICATION sent to 192.168.1.4+56714 (proto):
code 2 (Open Message Error) subcode 2 (bad peer AS number), Reason: no group for 192.168.1.4+56714 (proto) from AS 65100 found (peer as mismatch) in master
* Step 2: Interpret the messages.
* The first message indicates that a BGP NOTIFICATION was sent to 192.168.1.4 due to an "Open Message Error" with a "bad peer AS number" because peer 192.168.1.4 claims AS 65100, but
65000 is configured.
* The second message reiterates that the peer AS number 65100 does not match the configured AS
65000, causing a mismatch.
* Step 3: Understand the MD5 key error.
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Dec 22 19:23:29 router kernel: tcp_auth_ok: Packet from 192.168.1.5:64047 missing MD5 digest Dec 22 19:23:30 router kernel: tcp_auth_ok: Packet from 192.168.1.6:56201 missing MD5 digest
* These lines indicate that packets from 192.168.1.5 and 192.168.1.6 are missing the MD5 digest, suggesting a potential MD5 key misconfiguration.
* Step 4: Validate the answers.
* Option B: The 192.168.1.5 peer has a misconfigured MD5 key. This is correct because the logs show that packets from 192.168.1.5 are missing the MD5 digest.
* Option D: The 192.168.1.4 peer has a misconfigured autonomous system number. This is correct because the logs indicate that 192.168.1.4 claims AS 65100, while the router is configured for AS
65000.
References:
* Document on useful Juniper commands for troubleshooting BGP and understanding log messages.
* Commands for checking BGP logs: show log messages | match notification, show bgp summary, show configuration protocols bgp.
質問 # 77
Which three MSTP parameters must match on all switches in the same MST region? (Choose three.)
- A. configuration name
- B. revision number
- C. MSTI-to-VLAN mapping
- D. bridge priority
- E. forwarding delay
正解：A、B、D
質問 # 78
Referring to the exhibit, anycast RP is implemented to ensure multicast service availability. The source is currently sending multicast traffic using group 239.1.1.1 and R3 is receiving PIM register messages, but R2 does not have active source information. In this scenario, what are two methods to receive the active source information on R2? (Choose two.)
- A. Configure an MSDP protocol between R1 and R2.
- B. Configure an RP set in PIM on R2 and R3, allowing the RPs to forward PIM register messages to the other RPs in the set.
- C. Configure an MSDP protocol between R2 and R3.
- D. Configure an RP set in PIM on R1, allowing R1 to forward PIM register messages to R2 and R3 in the set.
正解：B、D
質問 # 79
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 voice VLAN feature must be used with LLDP-MED to associate VLAN ID and 802.1p values with the traffic.
- B. The interfaces must be configured as access ports.
- C. The voice VLAN feature will enable incoming tagged data and voice traffic to be associated with separate VLANs.
- D. Assigning the incoming voice and data traffic to separate VLANs enables the ability to prioritize the traffic using CoS.
正解：B、D
質問 # 80
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