最新Juniper JN0-349一発合格！試験リアル問題集最新の[2023年01月]
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質問 11
Which statement about configuring persistent MAC learning is correct?
- A. Persistent MAC learning requires 802.1X authentication.
- B. Persistent MAC learning can be configured on access mode interfaces.
- C. Persistent MAC learning cannot be configured on redundant trunk groups.
- D. Persistent MAC learning flushes dynamically learned MAC addresses on reboots.
正解: B
質問 12
You are a service provider and have multiple customers in a building.
You are installing a new switch that can host all of your customers. However, you would like to
ensure that one customer cannot see or broadcast to another customer.
You would also like to have them use a common gateway IP address from the building. What
should be used to provide this access?
- A. private VLAN
- B. VLAN
- C. Layer 2 tunneling
- D. filter-based VLAN
正解: A
質問 13
Click the Exhibit button.
Your router is configured to peer with your ISP's router using BGP. You can only control your BGP configuration.
Which address families are negotiated between the two BGP peers shown in the exhibit?
- A. inet-unicast
- B. inet-unicast inet-vpn-unicast 12vpn-signaling
- C. inet-vpn-unicast
- D. inet-unicast inet-vpn-unicast 12vpn
正解: A
質問 14
Which two routers belong to the 172.16.0.0/22 aggregate route? (Choose two.)
- A. 172.16.5.0/24
- B. 172.16.0.0/24
- C. 172.16.3.0/24
- D. 172.16.4.0/24
正解: B,C
質問 15
Which two statements about DHCP snooping are correct? (Choose two.)
- A. By default, the Junos OS treats access ports as trusted and trunk ports as untrusted.
- B. DHCP snooping uses ARP to add statically defined IP addresses to its database.
- C. DHCP snooping inspects all DHCP packets on untrusted ports.
- D. The DHCP database maps IP addresses, MAC addresses, and the associated VLAN.
正解: C,D
質問 16
You have a conference room with an open network port that is used by employees to connect to the network.
You are concerned about rogue switches being connected to this port
Which two features should you enable on your switch to limit access to this port? (Choose two.)
- A. MAC limiting
- B. dynamic ARP inspection
- C. DHCP snooping
- D. 802.1X
正解: B,C
質問 17
Referring to the exhibit, all users connected to the same VLAN can communicate with each other,
but not with users on other VLANs in this network.
What must be configured to enable communication between the VLANs?
- A. The switch ports to which the users are connected should be configured as trunk ports.
- B. A logical IRB interface must be created and assigned to each VLAN.
- C. A separate routing device is required to forward traffic between the configured VLANs.
- D. A single logical IRB interface must be created and assigned to all three VLANs
正解: B
質問 18
You have a conference room with an open network port that is used by employees to connect to the network. You are concerned about rogue switches being connected to this port.
Which two features should you enable on your switch to limit access to this port? (Choose two.)
- A. MAC limiting
- B. dynamic ARP inspection
- C. DHCP snooping
- D. 802.1X
正解: B,C
質問 19
What are two characteristics of IS-IS CSNPs? (Choose two.)
- A. IS-IS CSNPs are used to maintain the link-state database synchronization.
- B. IS-IS CSNPs contain header information for specific requested link-state PDUs.
- C. IS-IS CSNPs contain header information for all link-state PDUs.
- D. IS-IS CSNPs are used to request a copy of a missing link state PDU.
正解: A,C
質問 20
Referring to the exhibit, Router-1 and Router-2 are failing to form an IS-IS adjacency.
What should you do to solve the problem?
- A. Change the IP subnet masks to match on the ge-0/0/2 interfaces of both routers.
- B. Change the ISO areas on the Io0 interfaces to match on both routers.
- C. Remove the ISO address from ge-0/0/2 on Router-1.
- D. Remove the overloaded statement from Router-1.
正解: A
質問 21
Which two requirements must be satisfied before graceful restart work? [Choose two)
- A. a neighbor configured with BfD
- B. a neighbor configured with graceful restart
- C. a stable network topology
- D. a neighbors with an uptime greater than an hour
正解: B,C
解説:
Explanation
https://www.oreilly.com/library/view/juniper-mx-series/9781449358143/ch09s03.html The primary drawback to GR is the need for protocol extensions and helper support in neighboring routers, and a stable network topology. If any neighbors do not support GR, or if other changes occur in the network, GR ends up aborting and loss results in the dataplane. Even when all goes to plan and the GR event succeeds, which means there is zero loss in the data plane, there is still control plane flap and a subsequent need for protocol reconvergence between the restarting router and its helpers, ...
質問 22
Click the Exhibit button.
. What is the problem?
- A. Aggregated interface must be defined under the chassis stanza.
- B. The LAG member interfaces are configured across different line cards.
- C. LACP is required for LAG to work.
- D. LAG requires more than two member links.
正解: A
解説:
Explanation
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 23
Referring to the exhibit, which configuration will force traffic to always use ae0.0 as long as it is
active?
- A. Option C
- B. Option B
- C. Option D
- D. Option A
正解: A
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 24
Which two OSPF header fields must match to form an adjacency over a broadcast connection?
(Choose two.)
- A. Hello interval
- B. neighbor
- C. Options
- D. Router priority
正解: A,C
解説:
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/topic-map/ospf-
overview.html
質問 25
Which statement is correct about trunk ports?
- A. By default, a trunk port can have only a single VLAN assigned
- B. By default, trunk ports accept only VLAN tagged traffic
- C. Trunk ports must have an IRB assigned to accept untagged traffic.
- D. Trunk ports mast have an IRB assigned to accept VLAN tagged traffic
正解: B
質問 26
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