2026 JN0-364 exam torrent JN0-364 Study Guide
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NEW QUESTION # 84
What are two bridging concepts that are used to maintain an Ethernet switching table? (Choose two.)
- A. timing
- B. aging
- C. learning
- D. exporting
Answer: B,C
Explanation:
In Ethernet switching, learning and aging are two fundamental concepts for maintaining a dynamic Ethernet switching table (also known as a MAC address table). Learning is the process by which switches listen for frames and learn the MAC addresses by associating them with the incoming port. Aging is the mechanism that ensures the switch updates its table by removing MAC addresses that have not been seen for a certain amount of time (aging time).
NEW QUESTION # 85
Which two steps are required to enable MPLS on a physical interface in Junos? (Choose two.)
- A. Add family mpls on the loopback interface.
- B. Add the loopback interface under protocols mpls.
- C. Add family mpls on the interface.
- D. Add the interface under protocols mpls.
Answer: C,D
Explanation:
To enable MPLS on a physical interface in Junos, the family mpls statement must be added to the interface configuration. Additionally, the interface itself must be specified under the protocols mpls section of the configuration.
NEW QUESTION # 86
You are using EBGP to connect to two upstream peers in the same AS. You want to make one of the links less preferred for traffic entering your network from the peer's AS.
Which feature should you use to achieve this goal?
- A. origin code
- B. AS-path prepending
- C. local preference
- D. a route reflector
Answer: B
Explanation:
AS-path prepending artificially lengthens the AS-path attribute by adding additional instances of the local AS number when advertising routes to a specific external peer. Because BGP prefers routes with shorter AS paths, the upstream AS will consider the prepended path less attractive and will prefer the other link when sending traffic toward the network.
NEW QUESTION # 87
You are a network architect designing a brand new network. You want to deploy RSVP LSPs in this network. You are currently in the process of choosing whether to run OSPF or IS-IS as your interior gateway protocol.
In this scenario, which two statements are correct about IGP traffic engineering extensions in an RSVP network? (Choose two.)
- A. In IS-IS, traffic engineering extensions are enabled by default.
- B. In OSPF, traffic engineering extensions are enabled by default.
- C. You must explicitly configure OSPF to carry traffic engineering extensions.
- D. You must explicitly configure IS-IS to carry traffic engineering extensions.
Answer: C,D
Explanation:
When using IS-IS in an RSVP traffic engineering environment, traffic engineering extensions must be explicitly enabled so that IS-IS advertises TE information such as link bandwidth and administrative groups to build the traffic engineering database.
When using OSPF, traffic engineering extensions must also be explicitly configured. Enabling OSPF traffic engineering allows the protocol to advertise TE attributes required by RSVP-TE and CSPF for calculating constrained paths.
NEW QUESTION # 88
Which statement is true about the BGP active state?
- A. The BGP active state is when BGP exchanges update, notification, and keepalive messages with its peer.
- B. The BGP active state is the initial state where all BGP traffic is refused.
- C. The BGP active state is when BGP waits for the TCP connection to be established.
- D. The BGP active state is when BGP attempts to acquire a peer by initiating a TCP connection.
Answer: D
NEW QUESTION # 89
Referring to the exhibit, internal BGP between R1 and R2 is not establishing.
What is the problem In this scenario?
- A. R1 needs to be configured with an explicit router ID.
- B. R1 and R2 must each have unique AS numbers.
- C. R1 does not have a route to 192.168.200.2.
- D. R1 needs to be configured with a next-hop self policy.
Answer: C
Explanation:
The exhibit shows that the BGP session state is "Active," which generally indicates that the router is trying to establish a BGP session but has not received a response. One common cause for this issue is that there is no route to the BGP neighbor's address. Since the routers are using internal BGP (iBGP) and they are in the same AS, the AS number does not need to be unique, and a next-hop self policy is not strictly required for iBGP. The router-id is usually automatically determined and does not need to be explicitly set.
NEW QUESTION # 90
Referring to the exhibit. Which two statements are correct about the service provider MPLS network shown in the exhibit? (Choose two.)
- A. R3 is considered an ingress router.
- B. R3 is considered a transit router.
- C. R3 is considered a PE router.
- D. R3 is considered a P router.
Answer: B,D
Explanation:
In a service provider MPLS network, P routers are interior routers that are used to transit MPLS- labeled packets between edge routers but do not attach or remove MPLS labels themselves.
These routers are also referred to as transit routers. They are neither ingress nor egress routers (which are typically labeled as PE routers).
NEW QUESTION # 91
Which two interface types are used as tunnel endpoints? (Choose two.)
- A. ae
- B. ip
- C. ge
- D. gr
Answer: B,D
Explanation:
tunnel-end-point name {
ipv4 {
source-address 10.255.1.1;
destination-address 10.255.2.0/25;
}
gre {
key 9;
}
}
The ip and gr interface types are used as endpoints for various tunneling protocols. ip is a generic term that can refer to any IP-based tunnel, while gr specifically refers to Generic Routing Encapsulation (GRE) tunnel interfaces in Junos.
NEW QUESTION # 92
You are asked to configure a new network environment that will be based on IPv6 and use OSPF. In this scenario, which two statements correctly identify configuration task considerations? (Choose two.)
- A. Participating interfaces are only required to be configured with the IPv6 protocol family and address.
- B. The router ID used must be based on a 32-bit identifier value.
- C. Participating interfaces must be configured with both IPv4 and IPv6 protocol families and addresses.
- D. The router ID used must be based on a 128-bit identifier value.
Answer: A,B
Explanation:
When transitioning to an IPv6 environment usingOSPFv3(the version of OSPF designed for IPv6), there are significant architectural differences compared to OSPFv2 (IPv4). According to Juniper Networks technical documentation, OSPFv3 was redesigned to be more protocol-agnostic.
Router ID (Option C):
Despite OSPFv3 routing IPv6 (which uses 128-bit addresses), the OSPFRouter IDremains a32-bit value formatted like an IPv4 address (e.g., 1.1.1.1). This is a common point of confusion. In a pure IPv6 environment where no IPv4 addresses are configured on any interfaces, a Juniper router cannot automatically derive a Router ID. Therefore, the administrator must manually configure a 32-bit Router ID under [edit routing-options] for the OSPFv3 process to initialize.
Interface Configuration (Option D):
OSPFv3 runs directly over the IPv6 link-local scope. Unlike OSPFv2, it does not require an IPv4 address to function. Therefore, interfaces areonly required to be configured with family inet6(Option D). You do not need "dual-stack" (both IPv4 and IPv6) functionality just to run OSPFv3. The protocol uses the link-local address (fe80::/10) of the interface for neighbor adjacencies and as the next hop for routing updates. This separation allows OSPFv3 to carry multiple "address families" (both IPv4 and IPv6 unicast) if needed, but the base requirement for an IPv6-only network is simply the family inet6 configuration.
NEW QUESTION # 93
Which two statements are correct about TLVs in IS-IS? (Choose two.)
- A. TLVs only support encoding IPv4 routing information.
- B. TLVs allow flexible encoding of routing information.
- C. LSPs can contain multiple TLVs.
- D. LSPs can only contain one TLV.
Answer: B,C
Explanation:
IS-IS uses TLVs (Type-Length-Value structures) to encode routing information in a flexible and extensible way. This design allows new capabilities, address families, and attributes to be added without changing the base protocol format.
An IS-IS Link-State PDU can contain multiple TLVs, each carrying different types of information such as reachability, metrics, IPv4 or IPv6 prefixes, and other protocol extensions.
NEW QUESTION # 94
Which new field is added to an IPv6 header as compared to IPv4?
- A. version
- B. checksum
- C. flow label
- D. fragment offset
Answer: C
Explanation:
The IPv6 header includes a new field that is not found in the IPv4 header, called the flow label.
The flow label in IPv6 is used to identify packets that require special handling by routers for quality of service (QoS) or other reasons, allowing these packets to be handled efficiently as they move through the network.
NEW QUESTION # 95
Which two statements are correct about IS-IS? (Choose two.)
- A. A level 1 only router can form an adjacency with a level 2 only router.
- B. A level 1 only router can never form an adjacency with a level 2 only router.
- C. For level 2 adjacencies, the area IDs can be different.
- D. For level 2 adjacencies, the area IDs must be the same.
Answer: B,C
Explanation:
A Level 1 router can become adjacent with the Level 1 and Level 1-2 (L1/L2) router. A Level 2 router can become adjacent with Level 2 or Level 1-2 (L1/L2) router. There is no adjacency between L1 only and L2 only router. HOWEVER: If two routers are in different areas, they can only form a Level 2 adjacency. As such, two routers in different areas can NOT form a Level 1 adjacency. If you want two routers to form a Level 1 adjacency, they have to be in the same area.
IS-IS (Intermediate System to Intermediate System) operates at two levels: Level 1 and Level 2.
Level 1 routers are only aware of their own area's topology, while Level 2 routers have knowledge of the topology across areas. A Level 1 router cannot form an adjacency with a Level 2 router unless the Level 2 router is also operating as a Level 1 router (Level 1-2 router). Level 2 routers can form adjacencies regardless of their area IDs because Level 2 operates at the domain level and is used to interconnect different IS-IS areas.
NEW QUESTION # 96
Exhibit:
user@Router-1> show route 172.24/16
inet.0: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
...
172.24.0.0/24 *[OSPF/150] 01:31:31, metric 0, tag 0
> to 172.20.0.2 via ge-0/0/2.0
to 172.20.1.2 via ge-0/0/3.0
user@Router-1> show route forwarding-table
Routing table: default.inet
Internet:
Destination Type RtRef Next hop Type Index NhRef Netif
...
172.24.0.0/24 user 0
172.20.0.2 ucst 551 2 ge-0/0/2.0
172.20.1.2 ucst 552 2 ge-0/0/3.0
Referring to the exhibit, which two statements are true? (Choose two.)
- A. The default route load-balancing behavior of this router has been modified.
- B. The router is performing default route load-balancing behavior.
- C. This router will only choose the next hop with a > next to it in the routing table.
- D. This router will choose both next hops in the routing table.
Answer: A,D
Explanation:
In Junos OS, understanding the distinction between theRouting Information Base (RIB)and theForwarding Information Base (FIB)is fundamental to analyzing traffic patterns and load-balancing behavior. The RIB (show route) contains all prefixes learned via various protocols, while the FIB (show route forwarding-table) contains only the active next-hops that are actually programmed into the Packet Forwarding Engine (PFE).
According to Juniper Networks technical documentation, the default behavior for Junos OS when encounteringEqual-Cost Multipath (ECMP)routes is to select only a single next-hop from the available candidates in the RIB and install that single path into the FIB. In a default state, even if the show route output displays multiple next-hops for a destination like 172.24.0.0/24, only one would have the active route symbol (
>) and only that one would appear in the forwarding table.
In the provided exhibit, the show route output shows two next-hops for 172.24.0.0/24, but only the first one (172.20.0.2) is marked with the>symbol as the active selection. However, the subsequent show route forwarding-table output reveals thatboth next-hops(172.20.0.2 and 172.20.1.2) are currently present in the forwarding table for that same destination. This discrepancy indicates that thedefault load-balancing behavior has been modified (Option B). This modification is typically achieved by creating a routing policy with the action then load-balance per-packet (which actually results in flow-based load balancing) and applying it to the forwarding table via the export statement under [edit routing-options forwarding-table].
Because the forwarding table now contains both next-hops, the router is no longer restricted to a single path.
Therefore, therouter will choose both next-hops in the routing table (Option D)for packet forwarding, distributing flows across the two available Gigabit Ethernet interfaces (ge-0/0/2.0 and ge-0/0/3.0). This ensures higher utilized bandwidth and provides redundancy at the data plane level.
NEW QUESTION # 97
Click the Exhibit button. Referring to the exhibit, R1 is advertising prefix 203.0.113.0/24 to R2 over EBGP. R2 is configured to advertise this prefix into IBGP. R3 receives the 203.0.113.0/24 route, however the route is hidden.
Which configuration statement do you need to add to R2 to solve this problem?
- A. set policy-options policy-statement export-to-ibgp then next-hop self
- B. set policy-options policy-statement export-to-ibgp from route-filter
- C. 50
set protocols bgp group EBGP export export-to-ibgp - D. 203.0.113.0/24 orlonger
set policy-options policy-statement export-to-ibgp then local-preference
Answer: A
Explanation:
R2 is advertising the EBGP-learned route into iBGP without changing the next-hop, so R3 receives the route with a next-hop of 172.16.10.1 (R1). Because that next-hop is not reachable from R3, Junos marks the route as hidden. Setting next-hop self on R2 makes the next-hop reachable (R2), so the route becomes usable on R3.
NEW QUESTION # 98
Referring to the exhibit. You are asked to assign interface xe-1/0/5 to a virtual switch. What must be accomplished to complete the configuration?
- A. Interface xe-1/0/5 must be added to routing-instance sw-1.
- B. Interface xe-1/0/5 must be added to routing-instance sw-1 vlan_2.
- C. Interface xe-1/0/5 must be a trunk port.
- D. An IRB interface must be configured to routing-instance sw-1 vlan_2.
Answer: B
Explanation:
The exhibit shows the configuration of a virtual switch called sw-1 with two VLANs defined within it:
vlan_1 with VLAN ID 1 and vlan_2 with VLAN ID 2. To add interface xe-1/0/5 to the virtual switch, the interface must be associated with one of these VLANs. Since the interface is already configured with vlan-id 2, it implies that it is intended to be part of vlan_2 within the virtual switch sw-1. Therefore, the correct answer is to add interface xe-1/0/5 to the vlan_2 bridge domain under the sw-1 routing instance.
NEW QUESTION # 99
Referring to the exhibit. You are advertising a summary route that represents your local network (172.20.0.0716) to both ISP A and ISPB. You want to influence all traffic sent to you from ISP C to go through R2.
How would you accomplish this task?
- A. On R1, prepend your AS number three times on the 172.20.0.0/16 route when advertising It to ISP 1.
- B. On R1, change the local preference value to 250.
- C. On R2. prepend your AS number three times on the 172.20.0.0/16 route when advertising it to ISP 2.
- D. On R2, change the local preference value to 50.
Answer: C
Explanation:
To influence ISP C to prefer the path through R2 for the 172.20.0.0/16 network, R2 should make its path less preferable to ISP B by prepending its AS number multiple times. This makes the path through R2 appear longer and less desirable to ISP C, which would receive these updates from ISP B. AS path length is a well-known attribute in BGP and is used to determine the best path; paths with a longer AS path are considered less preferable.
NEW QUESTION # 100
Which address is used by OSPF hello packets?
- A. 225.0.0.5 using unicast
- B. 224.0.0.5 using multicast
- C. 224.0.0.5 using unicast
- D. 255.0.0.5 using multicast
Answer: B
NEW QUESTION # 101
A BGP router receives two routes to the same prefix. One route has a higher local preference, while the other has a shorter AS path. In this scenario, which route would be selected?
- A. The route with the lower origin code.
- B. The route with the shorter AS path.
- C. The route with the higher local preference.
- D. The route with the lowest MED value.
Answer: C
Explanation:
TheBGP path selection algorithmis a deterministic process used by Juniper routers to select the single "best" path from the BGP table to be placed into the routing table (inet.0). This algorithm follows a specific, hierarchical set of rules. According to Juniper Networks technical documentation, the router evaluates attributes in a fixed order, and once a tie is broken at a specific step, the remaining steps are ignored.
The order of the primary BGP attributes in Junos OS is as follows:
* Highest Local Preference:This is the first attribute evaluated after the basic check for a reachable next hop. Local preference is used within an Autonomous System (AS) to prioritize one exit point over another.
* Shortest AS_PATH:If the local preference is equal, the router then evaluates the length of the AS_PATH attribute.
* Lowest Origin Code:(IGP < EGP < Incomplete).
* Lowest Multi-Exit Discriminator (MED).
In this specific scenario, the router compares a path with ahigher local preferenceagainst a path with a shorter AS path. Because theLocal Preferencecheck occurs at Step 1 and theAS_PATHcheck occurs later at Step 2, the router will select the path with the higher local preference immediately. The length of the AS path becomes irrelevant in this comparison because the tie was already broken by the local preference value.
This allows network administrators to override the default "shortest path" logic of BGP to prefer specific providers or links based on business requirements.
NEW QUESTION # 102
Exhibit:
Referring to the exhibit, why is the ge-0/0/0.0 interface shown as belonging to Level 3?
- A. This interface is configured as a broadcast interface, that uses Level 3 as shorthand for both Level 1 and Level 2.
- B. This interface is configured as a broadcast interface that has three adjacencies with other routers on the shared LAN.
- C. This interface is configured as a point-to-point interface, that uses Level 3 as shorthand for both Level 1 and Level 2.
- D. This interface connects to a super spine.
Answer: C
Explanation:
In theIS-IS (Intermediate System to Intermediate System)protocol as implemented in Junos OS, the output of operational commands uses specific numerical representations to denote the hierarchy levels of a neighbor adjacency. Understanding these values is crucial for troubleshooting peering relationships in a multi-level IS- IS network.
According to Juniper Networks technical documentation, the show isis adjacency command displays the status of the neighbors. The "L" column indicates the level of the adjacency:
* Level 1:Indicates the adjacency is strictly for intra-area routing.
* Level 2:Indicates the adjacency is strictly for backbone/inter-area routing.
* Level 3:This is ashorthand representationused by Junos to indicate that a single adjacency has been established forboth Level 1 and Level 2 simultaneously.
The critical distinction in this question lies in the interface type. On abroadcast interface(such as standard Ethernet), IS-IS typically establishes and maintains separate adjacencies for Level 1 and Level 2. In the CLI output for a broadcast link, you would generally see two separate lines for the same neighbor-one for Level
1 and one for Level 2.
However, on apoint-to-point (P2P)interface, IS-IS can negotiate both levels within a single adjacency. When this occurs, Junos consolidates the output into a single entry and usesLevel 3to signify that the adjacency is functional for both levels. Since the exhibit shows ge-0/0/0.0 as Level 3, it confirms that the link is configured with a point-to-point encapsulation (either natively or via the interface-type p2p command) and is acting as a Level 1/2 adjacency.
Option B is incorrect as the number "3" refers to protocol levels, not the count of neighbors. Option C is a reference to data center architectures that does not influence IS-IS level nomenclature. Option D is incorrect because, as noted, broadcast interfaces display these levels separately rather than using the Level 3 shorthand.
NEW QUESTION # 103
An established RSVP-signaled LSP suffers a link failure. What is one action taken by the local RSVP-enabled router?
- A. A ResvTear message is sent downstream.
- B. A ResvTear message is sent upstream.
- C. A ResvErr message is sent upstream.
- D. A ResvErr message is sent downstream.
Answer: B
NEW QUESTION # 104
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