PROFESSIONAL DOWNLOAD JN0-351 FREE DUMPS - CORRECT & NEWEST JN0-351 MATERIALS FREE DOWNLOAD FOR JUNIPER JN0-351 EXAM

Professional Download JN0-351 Free Dumps - Correct & Newest JN0-351 Materials Free Download for Juniper JN0-351 Exam

Professional Download JN0-351 Free Dumps - Correct & Newest JN0-351 Materials Free Download for Juniper JN0-351 Exam

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All these three Juniper JN0-351 exam questions formats contain the real and updated JN0-351 exam questions. These Enterprise Routing and Switching, Specialist (JNCIS-ENT) (JN0-351) exam questions are being presented in practice test software and PDF dumps file formats. The JN0-351 desktop practice test software is easy to use and install on your desktop computers. Whereas the other Juniper JN0-351 web-based practice test software is concerned, this is a simple browser-based application that works with all operating systems. Both practice tests are customizable, simulate actual exam scenarios, and help you overcome mistakes.

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If you don't have an electronic product around you, or you don't have a network, you can use a printed PDF version of our JN0-351 training materials. We also strongly recommend that you print a copy of the PDF version of your JN0-351 study materials in advance so that you can use it as you like. And you can also take notes on the printale JN0-351 Exam Questions whenever you had a better understanding. Of course, which kind of equipment to choose to study will ultimately depend on your own preference.

Juniper Enterprise Routing and Switching, Specialist (JNCIS-ENT) Sample Questions (Q23-Q28):

NEW QUESTION # 23
You are receiving multiple BGP routes from an upstream neighbor and only want to advertise a single summarized prefix to your internal OSPF neighbors. This route should only be advertised when you are receiving these BGP routes from this neighbor.
In this scenario, which type of route should you create?

  • A. static route using the resolve feature
  • B. aggregate route
  • C. static route using qualified next hops
  • D. generate route

Answer: B

Explanation:
Explanation
In this scenario, you should create an 1. Aggregate routes are used for advertising summarized network prefixes1. They help minimize the number of routing tables in an IP network by consolidating selected multiple routes into a single route advertisement1. This approach is in contrast to non-aggregation routing, in which every routing table contains a unique entry for each route1.
Therefore, option A is correct. Options B, C, and D are not correct because:
Static route using the resolve feature: This type of route uses the resolve feature to install a static route in the routing table only if a specific condition is met1. However, it does not provide the capability to summarize multiple routes into a single prefix.
Generate route: This type of route generates a route that is always present in the routing table and can be used to summarize routes. However, it does not have the capability to only advertise the route when specific BGP routes are being received from a neighbor1.
Static route using qualified next hops: This type of route allows for the specification of multiple next-hop addresses for a static route1. However, it does not provide the capability to summarize multiple routes into a single prefix.


NEW QUESTION # 24
Exhibit.

You have configured the four EX Series switches with RSTP, as shown in the exhibit. You discover that whenever a link between switches goes up or down, the switches take longer than expected for RSTP to converge, using the default settings.
In this scenario, which action would solve the delay in RSTP convergence?

  • A. The hello-time must be increased.
  • B. The force-version must be removed.
  • C. The max-age must be increased to 20
  • D. The bridge priority for EX-4 must be set at 4000.

Answer: B

Explanation:
The exhibit shows the configuration of RSTP on EX-4, which has the command force-version stp. This command forces the switch to use the legacy STP protocol instead of RSTP, even though the switch supports RSTP1. This means that EX-4 will not be able to take advantage of the faster convergence and enhanced features of RSTP, such as edge ports, link type, and proposal/agreement sequence2.
The other switches in the network are likely to be running RSTP, as it is the default protocol for EX Series switches3. Therefore, there will be a compatibility issue between EX-4 and the other switches, which will result in longer convergence times and suboptimal performance. The switch will also generate a warning message that says "Warning: STP version mismatch with neighbor" when it receives a BPDU from a RSTP neighbor1.
To solve this problem, the force-version command must be removed from EX-4, so that it can run RSTP natively and interoperate with the other switches in the network. This will enable faster convergence and better stability for the network topology. To remove the command, you can use the delete protocols rstp force-version command in configuration mode1.


NEW QUESTION # 25
What is the default MAC age-out timer on an EX Series switch?

  • A. 300 minutes
  • B. 300 seconds
  • C. 30 seconds
  • D. 30 minutes

Answer: B

Explanation:
Explanation
The default MAC age-out timer on an EX Series switch is 300 seconds12. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed31. This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces1. When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces1.


NEW QUESTION # 26
You have DHCP snooping enabled but no entries are automatically created in the snooping database for an interface on your EX Series switch. What are two reasons for the problem? (Choose two.)

  • A. MAC limiting is enabled on the interface.
  • B. Dynamic ARP inspection is enabled on the interface.
  • C. The device that is connected to the interface has performed a DHCPRELEASE.
  • D. The device that is connected to the interface has a static IP address.

Answer: A,D

Explanation:
Explanation
The DHCP snooping feature in Juniper Networks' EX Series switches works by building a binding database that maps the IP address, MAC address, lease time, binding type, VLAN number, and interface information1. This database is used to filter and validate DHCP messages from untrusted sources1.
However, there are certain conditions that could prevent entries from being automatically created in the snooping database for an interface:
MAC limiting: If MAC limiting is enabled on the interface, it could potentially interfere with the operation of DHCP snooping. MAC limiting restricts the number of MAC addresses that can be learned on a physical interface to prevent MAC flooding attacks1. This could inadvertently limit the number of DHCP clients that can be learned on an interface, thus preventing new entries from being added to the DHCP snooping database.
Static IP address: If the device connected to the interface is configured with a static IP address, it will not go through the DHCP process and therefore will not have an entry in the DHCP snooping database1. The DHCP snooping feature relies on monitoring DHCP messages to build its database1, so devices with static IP addresses that do not send DHCP messages will not have their information added.
Therefore, options B and C are correct. Options A and D are not correct because performing a DHCPRELEASE would simply remove an existing entry from the database1, and Dynamic ARP inspection (DAI) uses the information stored in the DHCP snooping binding database but does not prevent entries from being created1.


NEW QUESTION # 27
Which statement is correct about IP-IP tunnels?

  • A. The TTL in the inner packet is decremented during transit to the tunnel endpoint.
  • B. IP-IP tunnels only support encapsulating IP traffic.
  • C. IP-IP tunnels only support encapsulating non-IP traffic.
  • D. There are 24 bytes of overhead with IP-IP encapsulation.

Answer: B

Explanation:
Explanation
IP-IP tunnels are a type of tunnels that use IP as both the encapsulating and encapsulated protocol. IP-IP tunnels are simple and easy to configure, but they do not provide any security or authentication features. IP-IP tunnels only support encapsulating IP traffic, which means that the payload of the inner packet must be an IP packet. IP-IP tunnels cannot encapsulate non-IP traffic, such as Ethernet frames or MPLS labels1.
Option A is correct, because IP-IP tunnels only support encapsulating IP traffic. Option B is incorrect, because IP-IP tunnels only support encapsulating non-IP traffic. Option C is incorrect, because the TTL in the inner packet is not decremented during transit to the tunnel endpoint. The TTL in the outer packet is decremented by each router along the path, but the TTL in the inner packet is preserved until it reaches the tunnel endpoint2.
Option D is incorrect, because there are 20 bytes of overhead with IP-IP encapsulation. The overhead consists of the header of the outer packet, which has a fixed size of 20 bytes for IPv43.
References:
1: IP-IP Tunneling 2: What is tunneling? | Tunneling in networking 3: IPv4 - Header


NEW QUESTION # 28
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