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| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Enterprise Routing and Switching, Specialist (JNCIS-ENT) |
| Exam Number: | JN0-351 |
| Exam Format: | Single-answer multiple choice, Multiple choice, Multiple-answer multiple choice |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Related Certifications: | JNCIA-Junos JNCIE-ENT JNCIP-ENT |
| Real Exam Qty: | 65 |
| Exam Price: | USD varies by region (typically around $200–$300 USD) |
| Passing Score: | ~60-70% |
| Exam Duration: | 90 minutes |
| Recommended Training: | Juniper Enterprise Routing & Switching Training Juniper Learning Portal |
| Exam Registration: | Pearson VUE Juniper Exams Juniper Certification Registration |
| Sample Questions: | Juniper JN0-351 Sample Questions |
| Exam Way: | Pearson VUE proctored exam (online or test center) |
| Pre Condition: | JNCIA-Junos (JN0-105) recommended as prerequisite knowledge |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/certification-tracks/enterprise-routing-switching/jncis-ent.html |
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NEW QUESTION # 171
You are asked to connect an IP phone and a user computer using the same interface on an EX Series switch. The traffic from the computer does not use a VLAN tag, whereas the traffic from the IP phone uses a VLAN tag.
Which feature enables the interface to receive both types of traffic?
Answer: D
Explanation:
The feature that enables an interface on an EX Series switch to receive both untagged traffic (from the computer) and tagged traffic (from the IP phone) is the voice VLAN. The voice VLAN feature in EX-series switches enables access ports to accept both data (untagged) and voice (tagged) traffic and separate that traffic into different VLANs. This allows the switch to differentiate between voice and data traffic, ensuring that voice traffic can be treated with a higher priority.
NEW QUESTION # 172
You are a network operator who wants to add a second ISP connection and remove the default route to the existing ISP You decide to deploy the BGP protocol in the network. What two statements are correct in this scenario? (Choose two.)
Answer: A,B
Explanation:
The rules are as simple as follows:
1. IBGP peers advertise routes received from EBGP peers to other IBGP peers.
2. EBGP peers advertise routes learned from IBGP or EBGP peers to other EBGP peers.
https://community.juniper.net/discussion/understanding-how-ibgpebgp-behaves-in-junos
NEW QUESTION # 173
You are a network operator who wants to add a second ISP connection and remove the default route to the existing ISP You decide to deploy the BGP protocol in the network.
What two statements are correct in this scenario? (Choose two.)
Answer: A,B
Explanation:
BGP is a routing protocol that operates between autonomous systems (AS). An AS is a group of routers under a single administrative control. BGP can be classified into two types: internal BGP (IBGP) and external BGP (EBGP). IBGP is the BGP communication between routers within the same AS, while EBGP is the BGP communication between routers in different AS. BGP uses the AS_PATH attribute to record the AS numbers that the route has passed through, and uses it to prevent routing loops and select the best path.
In this scenario, you want to add a second ISP connection and remove the default route to the existing ISP.
This means that you want to have more control over the routing decisions and use BGP to exchange routes with both ISPs. To do this, you need to deploy the BGP protocol in your network and configure both IBGP and EBGP sessions. The correct statements about BGP in this scenario are:
* IBGP peers advertise routes received from EBGP peers to other IBGP peers. This is the default behavior of IBGP, as it allows the routers within the same AS to learn the routes from different EBGP peers and select the best exit point. However, IBGP has a rule that it does not advertise routes received from IBGP peers to other IBGP peers, to avoid creating routing loops. Therefore, option B is correct and option C is incorrect. To overcome this rule, IBGP requires a full mesh topology, where every IBGP router is directly connected to every other IBGP router, or a route reflector or confederation design, where some IBGP routers act as intermediaries to reflect or aggregate the routes to other IBGP routers.
* EBGP peers advertise routes received from IBGP peers to other EBGP peers. This is the default behavior of EBGP, as it allows the routers in different AS to exchange routes and reachability information. However, EBGP has a rule that it does not advertise routes received from EBGP peers to other EBGP peers, to avoid creating routing loops. Therefore, option D is correct and option A is incorrect. To overcome this rule, EBGP uses the AS_PATH attribute to filter out the routes that contain its own AS number, or uses route maps or policies to control the route advertisement. IBGP does not update the next-hop attribute to ensure reachability within an AS, as the next-hop attribute is preserved by IBGP. Instead, IBGP relies on an underlying IGP (Interior Gateway Protocol) to provide reachability to the next-hop.
References: Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks , BGP Fundamentals > BGP Overview | Cisco Press , BGP Essentials: The Protocol - Pluralsight
NEW QUESTION # 174
Which statement is correct about graceful Routing Engine switchover (GRES)?
Answer: D
NEW QUESTION # 175
In addition to the MAC addresses, what information is stored in the bridging table? (Choose two.)
Answer: B,C
Explanation:
The bridging table is a data structure that stores the MAC addresses and the associated interface details and MAC learned time for each MAC address. The bridging table is used by the switch to forward frames based on the destination MAC address. The ether type details and the preamble of Ethernet packet are not stored in the bridging table, as they are not relevant for the switching process. References:
* Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks
* Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks
* [Junos OS Layer 2 Configuration Guide - TechLibrary - Juniper Networks]
* [Junos OS Layer 2 Configuration Guide - TechLibrary - Juniper Networks]
NEW QUESTION # 176
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