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NEW QUESTION # 22
You are deploying a new campus switching environment using EX Series switches. This new environment includes IP phones requiring Power over Ethernet (PoE) and end-user client PCs attached to a single switch port that will be configured with 802.1X authentication.
Considering the default configuration on an EX Series access switch and the configuration requirements to support this deployment, which two statements are correct? (Choose two.)
- A. Configuration for 802.1X on all relevant access ports must be added.
- B. Configuration for LLDP and LLDP-MED on all relevant access ports must be added.
- C. Configuration for PoE on all relevant access ports must be added
- D. Configuration for the voice VLAN for all relevant access ports must be added.
Answer: A,D
Explanation:
In a standard campus deployment on Juniper EX Series switches involving VoIP phones and 802.1X authentication, understanding the default behavior of Junos OS 24.4 is critical:
Voice VLAN (Option A): By default, an access port belongs to a single VLAN (the native or data VLAN).
For an IP phone to operate correctly on the same physical port as a PC, a Voice VLAN must be explicitly configured and associated with the interface. This allows the switch to segregate voice traffic (usually tagged) from data traffic (untagged).
802.1X Configuration (Option D): Access ports do not have 802.1X authentication enabled by default. To enforce network access control for the client PCs, you must manually enable and configure the dot1x protocol on all relevant interfaces.
PoE Default (Option B): On EX Series switches that support PoE (like P or MP models), PoE is enabled by default on all PoE-capable ports. Therefore, additional configuration is generally not required unless you need to change power priorities or management modes.
LLDP Default (Option C): Standard LLDP is typically enabled by default in the factory configuration of most EX Series switches to facilitate neighbor discovery. While LLDP-MED is used for VoIP, the core requirement for " deploying " the described environment highlights the manual steps of VLAN and security setup rather than protocol discovery which often runs out-of-the-box.
NEW QUESTION # 23
Which of the following IGPs does Junos support? (Choose two)
- A. Babel
- B. IS-IS
- C. EIGRP
- D. OSPF
Answer: B,D
NEW QUESTION # 24
Which two protocols are associated with the establishment of a Rendezvous Point in multicast networking? (Choose two)
- A. VRRP
- B. Bootstrap Protocol (BSR)
- C. Auto-RP
- D. LACP
Answer: B,C
NEW QUESTION # 25
In Junos, which configuration statement is correct for defining a BGP group that includes IPv6 addresses?
- A. set protocols bgp group GROUP_NAME family inet6 anycast
- B. set protocols bgp group GROUP_NAME family inet unicast
- C. set protocols bgp group GROUP_NAME family inet6 unicast
- D. set protocols bgp group GROUP_NAME family inet6 multicast
Answer: C
NEW QUESTION # 26
Click the Exhibit button.
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The bandwidth reservation for queue 0 is 76%.
- B. The bandwidth reservation for queue 0 is 100%.
- C. During times of sustained network congestion, traffic that is placed in queue 2 will be dropped if more than 10% of the interface bandwidth is used.
- D. During times of no network congestion, traffic that is placed in queue 2 will be dropped if more than 10% of the interface bandwidth is used.
Answer: B,C
Explanation:
The best-effort queue (queue 0) does not have a reserved bandwidth, so it effectively has 100% of remaining bandwidth after the other queues are serviced. For assured-forwarding (queue 2), the bandwidth reservation is 10%, so during sustained congestion, any traffic exceeding this allocation can be dropped to enforce the bandwidth limits.
NEW QUESTION # 27
Your OSPF network consists of a mix of 1GbE and 10GbE interfaces. By default, all interfaces have the same cost in your OSPF network. You are asked to ensure that the 10GbE interfaces are more preferred when available In this scenario, which two statements would accomplish this behavior? (Choose two.)
- A. You should define the reference bandwidth as 1G. which will assign the 1GbE interfaces a higher cost.
- B. You should define the reference bandwidth as 10G. which will assign the 1GbE interfaces a higher cost
- C. You should manually assign the interface metric for each 1GbE interface to be higher than the 10GbE interfaces in your OSPF network.
- D. You should manually assign the interface metric for each 10GbE interface to be higher than the 1GbE interfaces in your OSPF network.
Answer: B,C
Explanation:
OSPF determines the best path to a destination by calculating themetric (cost)of each link. By default, Junos OS uses areference bandwidthof100 Mbpsto calculate this cost using the formula:
When the reference bandwidth is left at the default 100 Mbps, any interface with a speed of 100 Mbps or higher (including 1 GbE and 10 GbE) is assigned a cost of1because the minimum OSPF cost is 1. This results in equal-cost paths, preventing the router from preferring the faster 10 GbE link.
To ensure 10 GbE interfaces are preferred, you must create a cost differential:
* Option A (Reference Bandwidth):By increasing the reference bandwidth to10G(or higher), the calculation changes. For a 10 GbE link, the cost becomes $10,000 / 10,000 = 1$. For a 1 GbE link, the cost becomes $10,000 / 1,000 = 10$. Since OSPF prefers the path with thelowest cumulative cost, the
10 GbE link is now preferred.
* Option D (Manual Metric):You can manually override the automatic cost calculation by assigning a higher metric specifically to the 1 GbE interfaces. If a 1 GbE interface is manually set to a cost of 50 and the 10 GbE interface remains at 1 (or is set to a lower value), the router will prioritize the 10 GbE path.
Option Bis incorrect because a higher metric makes a pathlesspreferred.Option Cis incorrect because a 1G reference bandwidth would still result in both 1 GbE and 10 GbE interfaces having a cost of 1.
NEW QUESTION # 28
A BGP network has been designed to provide resiliency and redundancy to a multihomed customer network.
Which two statements are correct in this scenario? (Choose two.)
- A. The TTL value of 1 is set to limit the scope of the EBGP session.
- B. A routing policy will be required to forward traffic to both next hops.
- C. Both the next hops will be used to forward traffic to R2.
- D. The ttl statement must be configured to accommodate peering to a loopback address of a directly connected peer.
Answer: B,D
NEW QUESTION # 29
Exhibit
Your network receives the full Internet BGP routing table from two different ISPs. You want your local routers to use Provider A to forward all Internet traffic as long as Provider A is available.
Referring to the exhibit, which two actions would satisfy this requirement? (Choose two.)
- A. Use a routing policy to set the local preference attribute value higher for the routes that are learned by R1
- B. Use a routing policy to set the local preference attribute value lower for the routes that are learned by R2.
- C. Use a routing policy to set the local preference attribute value lower for the routes that are learned by R1.
- D. Use a routing policy to set the local preference attribute value higher for the routes that are learned by R2.
Answer: A,B
Explanation:
In BGP path selection, the Local Preference attribute is one of the most common ways to influence outbound traffic from an Autonomous System (AS). It is a well-known discretionary attribute that is propagated throughout the AS to tell internal routers which path is preferred for a specific destination.
Priority Rule: In the BGP selection algorithm, a higher local preference value is always preferred over a lower one. The default value in Junos OS is 100.
Influencing Outbound Traffic (Option A): To ensure that Provider A is always preferred, you would apply an import policy on R1 (the router connected to Provider A) to set the local preference of all received routes to a value higher than the default (e.g., 200). Since 200 > 100, R3 and R4 will prefer the path via R1.
Alternative Method (Option C): Conversely, you can achieve the same result by applying an import policy on R2 (the router connected to Provider B) to set the local preference to a value lower than the default (e.g., 50).
Since the routes from R1 remain at the default of 100, and 100 > 50, the path via R1 (Provider A) is preferred.
Why B and D are incorrect: Setting a higher local preference on R2 (Option B) would make Provider B the preferred exit point. Setting a lower local preference on R1 (Option D) would make Provider A the least preferred exit point.
NEW QUESTION # 30
You are configuring port ge-0/0/0 on an EX Series switch connected to an IP phone that does not support LLDP-MED.
Which three configuration statements do you need to accomplish this task? (Choose three.)
- A. set interfaces ge-0/0/0 unit 0 family ethernet-switching port-mode trunk
- B. set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members voice-vlan
- C. set interfaces ge-01010 unit 0 family ethernet-switching vlan members data-vlan
- D. set interfaces ge-0/0/0 unit 0 family ethernet-switching native-vlan-id data-vlan
- E. set interfaces ge-0/0/0 unit 0 family ethernet-switching native-vlan-id voice-vlan
Answer: A,B,D
NEW QUESTION # 31
You have an Ethernet subnet that can receive multicast traffic through the network. There are two devices that want to receive multicast streams. One device is interested in group 239.1.1.1; the other device is interested in group 239.1.1.2.
How does each device determine which multicast stream is the one it is interested in?
- A. The DR for the LAN segment filters the streams to each device based on the IGMP membership.
- B. The devices listen to both multicast streams and discard the unwanted stream based on the destination group address.
- C. The destination MAC address of multicast packets is determined by the multicast Group address; hosts listen for the interesting MAC address.
- D. The devices listen to both multicast streams and the application that requested the multicast stream filters the unwanted stream.
Answer: C
NEW QUESTION # 32
A customer is connected to the provider's ge-0/0/0.0 interface. The provider uses ge-0/0/10.0 to forward traffic through the provider's core network to other sites in the customer's network. The ge-0/0/0.0 interface is configured to receive traffic tagged with a VLAN ID of 100.
Referring to the exhibit, which statement is true?
- A. The frame will be forwarded out interface ge-0/0/10 with both VLAN tag 100 and VLAN tag 200.
- B. The frame will be forwarded out interface ge-0/0/10 with VLAN tag 200 only.
- C. The frame will be forwarded out interface ge-0/0/10 with VLAN tag 100 only.
- D. The frame will be forwarded out interface ge-0/0/10 untagged.
Answer: A
NEW QUESTION # 33
You are asked to configure an 802.1X solution that supports dynamic VLAN assignment. In this scenario, which two modes support using vendor-specific attributes (VSAs)? (Choose two.)
- A. single-secure supplicant mode
- B. single supplicant mode
- C. static MAC bypass mode
- D. multiple supplicant mode
Answer: B,D
Explanation:
VSAs are supported only for 802.1X single supplicant configurations and multiple supplicant configurations.
NEW QUESTION # 34
Exhibit
You configured MVRP in your Layer 2 network using the configuration shown in the exhibit. You verified that the appropnate VLANs are configured and applied on the two access switches. You are using RSTP as your loop prevention mechanism. Unfortunately, the users are not able to communicate with their corresponding server attached to the Access-2 switch.
In this scenario, what should you do to solve this problem?
- A. Configure the access interfaces on the Access-2 switch under MVRP.
- B. Configure the access interfaces on the Access-1 switch under MVRP.
- C. Configure VSTP instead of RSTP as your loop-prevention mechanism.
- D. Configure the ge-070716.0 interface on the Core-1 switch under MVRP.
Answer: D
Explanation:
The exhibit shows a network topology where Multiple VLAN Registration Protocol (MVRP) is used to dynamically manage VLANs across switches Core-1, Access-1, and Access-2.
Identifying the Missing Configuration: According to the diagram, the trunk link between Core-1 and Access-2 uses interface ge-0/0/16.0 on the Core-1 side.
Output Analysis: However, the show protocols mvrp output for Core-1 only lists interfaces ge-0/0/14.0 and ge-
0/0/15.0.
MVRP Requirements: For MVRP to successfully propagate VLAN information between Access-2 and the rest of the network, the protocol must be enabled on every trunk interface in the path.
Solution: Because ge-0/0/16.0 is missing from the Core-1 MVRP configuration, VLAN registration messages from Access-2 are not being processed by Core-1. Configuring this interface under MVRP on Core-1 will solve the communication problem.
NEW QUESTION # 35
You must implement EVPN signaling on an EX Series device that is configured with both underlay and overlay networks. Which network protocol accomplishes this task?
- A. OSPF underlay network
- B. IS-IS underlay network
- C. EBGP overlay network
- D. MPLS overlay network
Answer: C
Explanation:
In an EVPN-VXLAN architecture, the network is divided into two distinct planes: theUnderlayand the Overlay.
* Underlay (IP Fabric):The underlay's only job is to provide IP reachability between the loopback addresses of all VTEPs (Virtual Tunnel Endpoints). This is typically achieved using OSPF, IS-IS, or EBGP.
* Overlay (EVPN Control Plane):The overlay is responsible for carrying Layer 2 MAC and Layer 3 IP reachability information between switches.EVPN signalingis the standard mechanism for this task.
* Protocol Choice (Option D):EVPN usesMP-BGP (Multiprotocol BGP)as its control plane protocol.
On Juniper EX Series and QFX Series switches, the most scalable and recommended design for the overlay isEBGP(External BGP).
* In a 3-stage or 5-stage Clos architecture, EBGP is used in the overlay to exchange EVPN routes (Route Types 1-5) between Leaf and Spine switches.
* EBGP simplifies configuration by avoiding the need for Route Reflectors (required for IBGP) and provides better control over route propagation through BGP community and policy management.
Incorrect Options:
* Options A and Brefer to the underlay protocols. While they provide the path for the VXLAN tunnels, they do not handle the EVPN signaling itself.
* Option C(MPLS) is a different transport technology. While EVPN can run over MPLS (EVPN-MPLS), campus designs on EX series devices specifically use VXLAN as the data plane, making EBGP the standard signaling protocol for the EVPN-VXLAN overlay.
NEW QUESTION # 36
Which three conditions does the Junos OS use to create a figure-of-merit value for each BGP route in the routing table? (Choose three.)
- A. The route is from IBGP or EBGP.
- B. The route is readvertised.
- C. The route has a configured local preference.
- D. The route's path attributes changed.
- E. The route is withdrawn.
Answer: B,D,E
Explanation:
Junos OS increases the figure-of-merit value when a BGP route becomes unstable through events such as route withdrawals, route readvertisements, and changes to route path attributes.
These conditions are used by route flap damping to identify unstable routes.
NEW QUESTION # 37
Exhibit:
Your network has an unmanaged switch between the hosts and your EX Series switch. After the traffic enters the EX Series switch, each host must be on a separate VLAN. How would you accomplish this task?
- A. Configure interface ge-0/0/3 to a mode trunk to assign the VLANs.
- B. Configure VSTP on interface ge-0/0/1 to assign the VLANs.
- C. Configure an input firewall filter on interface ge-0/0/3 to match the source MAC or IP address of the hosts to assign the VLANs.
- D. Configure an output firewall filter on interface ge-0/0/1 to match the destination MAC or IP address of the hosts to assign the VLANs.
Answer: C
NEW QUESTION # 38
Which protocol is used for port-level access control and authentication?
- A. AES
- B. 802.1X
- C. IPsec
- D. MD5
Answer: B
NEW QUESTION # 39
You have configured a EX Series switch as an access switch. The switch uses 802.1x for access control. The switch uses LLDP-MED to assign network configuration information to VoIP phone devices. A user has a desktop computer and a VoIP phone connected to the same switch port.
In this scenario, which statement is true?
- A. If the phone does not support 802.1x, single supplicant mode can be used.
- B. If the phone does not support 802.1x, it must be added to a MAC whitelist.
- C. If the phone does not support 802.1x, multiple supplicant mode can be used.
- D. If the phone does not support 802.1x, the phone will not be able to connect to the network.
Answer: A
NEW QUESTION # 40
What is the significance of the rendezvous point in PIM sparse-mode multicast routing?
- A. It is the initial meeting place for receivers and senders of multicast data
- B. It is used to optimize the multicast path to each receiver
- C. It acts as a central controller for all multicast streams in the network
- D. It serves as the backup mechanism for multicast stream delivery
Answer: A
NEW QUESTION # 41
Exhibit
You want to provide better performance for the video traffic that traverses your network The video traffic enters your network without any class-of-service markings According to Juniper Networks, which two classification methods are performed by the routers shown in the exhibit? (Choose two.)
- A. R2 and R3 perform multifield classification
- B. R2 and R3 perform behavior aggregate classification
- C. R1 performs behavior aggregate classification.
- D. R1 performs multifield classification.
Answer: B,D
Explanation:
The exhibit illustrates a standard end-to-end Class of Service (CoS) path consisting of an edge router (R1) and core/intermediate routers (R2 and R3).
* Edge Classification (Option B):The scenario specifies that video traffic enters the networkwithout any class-of-service markings. Because there are no DSCP or 802.1p bits to inspect, the ingress router (R1) cannot use simple Behavior Aggregate (BA) classification. Instead, it must useMultifield (MF) classification. MF classification allows the router to look deeper into the packet (Source/Destination IP, Protocol, Port numbers) to identify the video stream and assign it to a specific forwarding class. *Core Classification (Option D):Once R1 has identified the traffic, it will typically apply arewrite ruleon its egress interface to mark the packets with a specific CoS value (like a DSCP code). Consequently, the downstream routers (R2 and R3) do not need to perform expensive deep-packet inspection again. They can useBehavior Aggregate (BA) classification, which simply looks at the markings in the packet header to determine the appropriate forwarding priority.
* Option A and C:These are incorrect because BA classification is impossible on unmarked ingress traffic, and performing MF classification in the core is inefficient and not a recommended Juniper design practice for high-speed transit.
NEW QUESTION # 42
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