[2023年05月07日] JN0-349テストエンジンお試しセット、JN0-349問題集PDF
最新のJuniper JN0-349のPDFと問題集で（2023）無料試験問題解答
Juniper JN0-349試験は、企業ルーティングとスイッチングに関連する広範なトピックをカバーしています。試験には、Juniper Networksテクノロジーの知識を評価する複数選択肢の質問とシミュレーションが含まれています。試験でカバーされるトピックには、OSPF、BGP、レイヤー2スイッチング、VLAN、およびセキュリティが含まれます。JN0-349試験に合格した候補者は、Junosソフトウェア、ルーティングおよびスイッチング技術、およびトラブルシューティング技術の熟練度を証明したことになります。この認定は、Juniper Networksテクノロジーを扱うITプロフェッショナルで、雇用主やクライアントに自分の専門知識を証明したい人にとって有益です。
質問 # 17
You are adding a new EX4300 member switch to your existing EX4300 Virtual Chassis. However, the new member is not running the same Junos version as the other members.
By default, what is the expected behavior in this scenario?
- A. The new switch will be assigned a member ID and then placed in an inactive state.
- B. the Virtual Chassis will transition into a split brain situation between the existing master Routing Engine and the switch running the different version.
- C. The new switch is not recognized by the Virtual Chassis.
- D. The new switch will automatically pull the correct version from the master Routing Engine and perform the necessary upgrade.
正解：A
質問 # 18
Click the Exhibit button. What is the problem?
- A. LACP is required for LAG to work.
- B. The LAG member interfaces are configured across different line cards.
- C. LAG requires more than two member links.
- D. Aggregated interface must be defined under the chassis stanza.
正解：D
解説：
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/switches-interface-
aggregated.html
By default, no aggregated Ethernet interfaces are created. You must set the number of
aggregated Ethernet interfaces on the routing device before you can configure them. Specify that
you want to access the aggregated Ethernet configuration on the device. user@host# edit
chassis aggregated-devices ethernet Set the number of aggregated Ethernet interfaces. [edit
chassis aggregated-devices ethernet] user@host# set device-count number
質問 # 19
Which two statements are true about high availability on Junos devices? (Choose two.)
- A. NSR is dependent on helper routers to assist the routing platform in restoring routing protocol
information. - B. BFD is slower at detecting failures than default GRE or OSPF timers.
- C. NSR is independent of helper routers to assist the routing platform in restoring routing protocol
information. - D. BFD is faster at detecting failures than default GRE or OSPF timers.
正解：C、D
解説：
https://www.juniper.net/documentation/en_US/junos/topics/concept/nsr-overview.html
質問 # 20
Which two routes belong to the 172.16.0.0/22 aggregate route? (Choose two.)
- A. 172.16.4.0/24
- B. 172.16.3.0/24
- C. 172.16.0.0/24
- D. 172.16.5.0/24
正解：B、C
質問 # 21
You were provided a network diagram that told you to number your network from the
191.255.0.0/16 space. OSPF is enabled and adjacencies are up, but no routers are learning any
routes. What can explain this?
- A. You need to modify the martian table with a 191.255.0.0/16 accept statement
- B. The default OSPF export policies advertise nothing, so you need to apply export policy
- C. You need to enable OSPF on the lo0 interface to provide a route to the RID of each router in the network
- D. The default OSPF import policy rejects all OSPF routes, so you need to apply import policy
正解：A
質問 # 22
You must implement filter-based forwarding. You need to direct traffic from 192.168.1.0/24
through vr1 and traffic from 10.210.0.128/26 through vr2.
Which configuration is correct in this scenario?
- A. firewall {
family inet {
filter fbf-filter1 {
term match-192-subnet {
from {
source-address {
192.168.1.0/24;
}
}
then {
routing-instance vr1;
}
}
term match-10-subnet {
from {
source-address {
10.210.0.128/26;
}
}
then {
routing-instance vr2;
}
}
}
}
} - B. firewall {
family inet {
filter fbf-filter1 {
term match-192-subnet {
from {
source-address {
192.168.1.0/26;
}
}
then {
routing-instance vr2;
}
}
term match-10-subnet {
from {
source-address {
10.210.0.128/26;
}
}
then {
routing-instance vr1;
}
}
}
}
} - C. firewall {
family inet {
filter fbf-filter1 {
term match-192-subnet {
from {
source-address {
192.168.2.0/26;
}
}
then {
routing-instance vr2;
}
}
term match-10-subnet {
from {
source-address {
10.210.1.128/26;
}
}
then {
routing-instance vr1;
}
}
}
}
} - D. firewall {
family inet {
filter fbf-filter1 {
term match-192-subnet {
from {
source-address {
192.168.0.0/24;
}
}
then {
routing-instance vr1;
}
}
term match-10-subnet {
from {
source-address {
10.210.0.128/27;
}
}
then {
routing-instance vr2;
}
}
}
}
}
正解：A
質問 # 23
Which two statements are true regarding RIB groups? (Choose two.)
- A. A RIB group must contain one or more export-rib statements.
- B. The last table listed is the primary route table and determines the address family of the RIB group.
- C. A RIB group must contain one or more import-rib statements.
- D. The first table listed is the primary route table and determines the address family of the RIB group.
正解：C、D
質問 # 24
You are troubleshooting OSPF issues on your device. You run a trace log and receive the error shown in the exhibit.
What would case this error?
- A. MD5 authentication error
- B. stub area mismatch
- C. subnet mismatch
- D. missing route policy
正解：B
質問 # 25
Which statement is true about the configuration shown in the exhibit?
- A. The preference for the 172.30.25.1 next hop is 5.
- B. The preference for the 172.30.25.5.1 next hop is 7.
- C. 172.30.25.5.1 is the preference next hop.
- D. The preferred next hop is 172.30.25.5.
正解：D
質問 # 26
You must implement filter-based forwarding. You need to direct traffic from the 192.168.1.0/24 through vr1 and traffic from 10.210.0.128/26 through vr2.
Which configuration is correct in this scenario?
A)
B)
C)
D)
- A. Option D
- B. Option C
- C. Option B
- D. Option A
正解：A
質問 # 27
Which two statements are true about a unified in-service software upgrade (ISSU)? (Choose two.)
- A. The graceful Routing Engine switchover (GRES) and nonstop active routing (NSR) features must be enabled.
- B. Unified ISSU is only supported by the dual Routing Engine platforms.
- C. It is possible to take PICs offline or bring them online during a unified ISSU.
- D. The master Routing Engine and backup Routing Engine can be running different Junos versions before performing a unified ISSU.
正解：A、B
質問 # 28
Referring to the exhibit, which configuration will force traffic to always use ae0.0 as long as it is
active?
- A. Option D
- B. Option B
- C. Option C
- D. Option A
正解：C
解説：
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/redundant-trunk-
groups.html
1. set protocols rstp disable
2. set redundant-trunk-group group name interface interface-name primary
3. set redundant-trunk-group group name interface interface-name
4. option: set redundant-trunk-group group name preempt-cutover-timer seconds
Rapid Spanning Tree Protocol (RSTP) is enabled by default on EX Series switches to create a
loop-free topology, but an interface is not allowed to be in both a redundant trunk group and in a
spanning-tree protocol topology at the same time.
質問 # 29
Which two characteristics are true for EBGP peerings? (Choose two.)
- A. EBGP peers can be connected over a multihop connection.
- B. EBGP connects peer devices in the same autonomous system.
- C. EBGP connects peer devices in two different autonomous systems.
- D. EBGP peers must be directly connected.
正解：A、C
質問 # 30
Click the Exhibit button.
Referring to the exhibit, which two statements about BGP prefixes advertised by R1 to AS 65501 are true?
(Choose two.)
- A. R1 will modify the AS path attribute in prefixes advertised to AS 65501
- B. R1 will modify the originator ID attribute in prefixes advertised to AS 65501
- C. R1 will modify the cluster list attribute in prefixes advertised to AS 65501
- D. R1 will modify the next-hop attribute in prefixes advertised to AS 65501
正解：A、C
質問 # 31
In the exhibit, each IP subnet in the network is associated with a unique VLAN ID.
Which action will ensure that Host C will communicate with Host A and Host B?
- A. Configure an IRB interface for each VLAN and associate It with its corresponding VLAN.
- B. Configure all switch ports connecting to the host devices as access ports associated with a
common VLAN. - C. Configure a port-based ACL that permits inter-VLAN routing for all configured VLANs.
- D. Configure all switch ports connecting to the host devices as trunk ports associated with all VLANs
正解：B
質問 # 32
Exhibit.
Which statement is true about the configuration shown in the exhibit?
- A. Only the local -pref import will be evaluated when routes are learned neighbor 172.301.1.
- B. Both the add-community and local-pref import policies will be evaluated routes are learned from neighbor 172.30.2.1.
- C. Only the add-community import policy will be evaluated routers are learned neighbor 172.30.1.1.
- D. No import policy will be evaluated when routes are learned from neighbor 172.30.2.1.
正解：A
質問 # 33
Which statement is true about IP-IP tunnels?
- A. Intermediate devices must have a route to the tunnel source address but do not require a route to the tunnel destination address
- B. Intermediate devices must have a route to the destination address of the traffic being tunneled.
- C. Intermediate devices must have a route to both the tunnel source address and the tunnel
destination address. - D. Intermediate devices must have a route to the tunnel destination address but do not require a
route to the tunnel source address.
正解：C
解説：
Routing is based on destination, not source; Only the route for the destination tunnel endpoint is
necessary for each packet.
If you're thinking about a lab environment with a single intermediary device, it's incidental that it
will have a route for both tunnel endpoint IPs. Only the relevant destination will be considered
with each packet it processes.
質問 # 34
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