JN0-649 PDF試験材料2025年最新の実際に出るJN0-649問題集
更新されたのはJuniper JN0-649問題集PDFオンラインエンジン
質問 # 107
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The DS-1 switch will be root bridge for MSTI 2.
- B. The DS-2 switch will be root bridge for MSTI 1.
- C. The DS-2 switch will be root bridge for MSTI 2.
- D. The DS-1 switch will be root bridge for MSTI 1.
正解：A、B
解説：
Bridge priority is to determine which bridge becomes the designated bridge.
質問 # 108
Which protocol is used for port-level access control and authentication?
- A. IPsec
- B. 802.1x
- C. AES
- D. MD5
正解：B
質問 # 109
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. Assigning the incoming voice and data traffic to separate VLANs enables the ability to prioritize the traffic using CoS.
- B. The voice VLAN feature will enable incoming tagged data and voice traffic to be associated with separate VLANs.
- C. The interfaces must be configured as access ports.
- D. The voice VLAN feature must be used with LLDP-MED to associate VLAN ID and 802.1p values with the traffic.
正解：A、C
質問 # 110
Referring to the exhibit, which statement is true?
- A. R1 is an ABR.
- B. R1 is a backbone router.
- C. R1 is an ASBR.
- D. R1 has the B bit set.
正解：C
質問 # 111
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 neighbor 10.30.100.3 statement is missing from leaf1's configuration.
- B. The leaf node is not configured for the family evpn NLRI.
- C. The spine node is not configured for the family inet NLRI.
- D. The neighbor 10.30.100.6 statement is missing from spine1's configuration.
正解：C
質問 # 112
You are configuring an EVPN overlay to allow VLANs to be stretched between two campus sites, but EVPN routes are not being exchanged. Referring to the exhibit, which configuration statement would solve this problem?
- A. Apply the delete protocols bgp group EVPN multipath multiple-an configuration on MX1 and MX2
- B. Apply the set protocols bgp group EVPN family EVPN signaling configuration on MX2.
- C. Apply the set protocols bgp group EVPN family inet-vpn any configuration on MX1 and MX?
- D. Apply the delete protocols bgp group EVPN cluster 172 .1.1. 53 configuration on MX2
正解：B
質問 # 113
Which type of BGP is used to peer with a different autonomous system?
- A. classless
- B. external
- C. dynamic
- D. static
正解：B
質問 # 114
Which two statements about OSPF routing policies are correct? (Choose two.)
- A. By default, OSPF import policies reject network-summary LSAs.
- B. By default, OSPF export policies accept network-summary LSAs.
- C. By default, OSPF import policies accept network-summary LSAs.
- D. By default, OSPF export policies reject network-summary LSAs.
正解：C、D
質問 # 115
What are two similarities between OSPFv2 and OSPFv3? (Choose two.)
- A. support for multiple instances per link
- B. protocol processing per link, not per subnet
- C. 32-bit router ID
- D. virtual links
正解：C、D
質問 # 116
You must ensure that all routes in the 10.0.0/8 address range are not advertised outside of your AS.
Which well-known BGP community should be assigned to these addresses to accomplish this task?
- A. no-export
- B. internet
- C. no-peer
- D. no-advertise
正解：A
解説：
For specifying the BGP community attribute only, you also can specify community-ids as one of the following well-known community names defined in RFC 1997:
no-advertise-Routes containing this community name are not advertised to other BGP peers.
no-export-Routes containing this community name are not advertised outside a BGP confederation boundary.
no-export-subconfed-Routes containing this community are advertised to IBGP peers with the same AS number, but not to members of other confederations.
llgr-stale-Adds a community to a long-lived stale route when it is readvertised.
no-llgr-Marks routes which a BGP speaker does not want to be retained by LLGR. The Notification message feature does not have any associated configuration parameters.
https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/community-edit-routing-options.html
質問 # 117
You have scheduled maintenance operations for one of the devices in your OSPF network.
Referring to the exhibit, which three statements are correct? (Choose three.)
- A. Any traffic destined for networks that terminate on R1 will still be forwarded to R1.
- B. R1 participates in OSPF routing but does not send or receive transit traffic.
- C. R1 does not participate in OSPF routing.
- D. R1 does not send or receive transit traffic during the maintenance window even if no alternative paths exist to the given destination.
- E. The metrics for all transit interfaces on R1 is set to the maximum value of 65,535.
正解：A、B、E
質問 # 118
You are implementing 802.1x access control in your network of EX Series switches. You have some older client devices connecting to your network which do not support 802.1x.
Which statement is true regarding the older devices?
- A. By default, the authenticator will send EAP messages until it reaches a predefined, after which it begins to forward traffic.
- B. By default, the supplicant will send EAP messages until it reaches a predefined limit, after which it begins to forward traffic.
- C. By default, the authenticator will send EAP messages and keep the port in an unauthorized state.
- D. By default, the supplicant will send EAP messages and keep the port in an unauthorized state.
正解：B
質問 # 119
You are deploying IP phones in your enterprise networks. When plugged in, the IP phones must automatically negotiate the power requirements for the new connection with the EX Series switches.
In this scenario, which protocol should be used to enable this behavior?
- A. LLDP
- B. LLDP-MED
- C. CDP
- D. MP-BGP
正解：B
質問 # 120
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 a route reflector for the VPN NLRI.
- 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 the apply-vpn-export feature on the local BGP peer.
正解：B、D
解説：
* Step 1: Identify the problem.
* Devices do not support VPN NLRI, and you must prevent these devices from receiving BGP VPN routes.
* Step 2: Analyze the possible solutions.
* Option A: Configure an import policy on the remote peer to reject the routes when they are received.
* This approach would require configuration on the remote peer, which might not always be practical or possible.
* Option B: Configure an export policy on the local BGP peer to reject the VPN routes being sent to the remote peer.
* This ensures the local BGP peer does not send the VPN routes to the remote peer, directly addressing the problem.
* Option C: Configure a route reflector for the VPN NLRI.
* This does not solve the issue of preventing the advertisement of VPN routes to non-supporting peers.
* Option D: Configure the apply-vpn-export feature on the local BGP peer.
* This feature ensures that the VPN export policies are applied, preventing the advertisement of VPN routes to peers that do not support VPN NLRI.
* Step 3: Verify the configurations.
* Option B and Option D directly address the requirement without needing configurations on the remote peer.
References:
* Juniper BGP configuration guide on export policies.
* Commands for applying export policies:
shell
Copy code
set policy-options policy-statement <policy-name> term <term-name> from protocol bgp-vpn set policy-options policy-statement <policy-name> term <term-name> then reject set protocols bgp group <group-name> export <policy-name> set protocols bgp apply-vpn-export
質問 # 121
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. The ttl statement must be configured to accommodate peering to a loopback address of a directly connected peer.
- C. The TTL value of 1 is set to limit the scope of the EBGP session.
- D. Both the next hops will be used to forward traffic to R2.
正解：A、B
質問 # 122
Which two statements are correct regarding the behavior shown in the exhibit? (Choose two.)
- A. The router is not an ABR.
- B. The ge-1/1/0 interface is configured as secondary for Area 0.
- C. The router is an ABR.
- D. The ge-1/1/0 interface is configured as secondary for Area 100.
正解：C、D
解説：
"Secondary interfaces are supported for LAN interfaces (the primary interface can be a LAN interface, but any secondary interfaces are treated as point-to-point unnumbered links over the LAN). In this scenario, you must ensure that there are only two routing devices on the LAN or that there are only two routing devices on the LAN that have secondary interfaces configured for a specific OSPF area."
[https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/topic-map/configuring-ospf-areas.html
質問 # 123
which protocol is a multicast routing protocol?
- A. OSPF
- B. IS-IS
- C. BGP
- D. P1M
正解：D
質問 # 124
Your network has Junos Fusion configured with MX960 routers as aggregation devices (AD) and QFX5100 switches as satellite devices (SO) Which two statements are coned in this scenario?
(Choose two )
- A. The Fusion extended ports are configured on the SDs.
- B. The AD runs the Junos software for all its connected SDs.
- C. All SDs connected to a single AD must use the same software version.
- D. SDs are added to the AD by configuring the cascade port on the AD.
正解：A、D
質問 # 125
Click the Exhibit button.
Which well-known community needs to be used to restrict 10.0.0.0/8 from being advertised to AS
2?
- A. no-export
- B. no-export-subconfed
- C. no-publish
- D. no-advertise
正解：A
解説：
no-advertise--Routes in this community name must not be advertised to other BGP peers.
no-export--Routes in this community must not be advertised outside a BGP confederation boundary. A stand alone autonomous system that is not part of a confederation should be considered a confederation itself.
no-export-subconfed--Routes in this community must not be advertised to external BGP peers, including peers in other members' ASs inside a BGP confederation.
質問 # 126
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