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Juniper JN0-649 exam is a professional level certification that is designed to validate the skills and knowledge of networking professionals in enterprise routing and switching. JN0-649 exam covers a wide range of topics related to network architecture, protocols, and technologies used in enterprise networks. Enterprise Routing and Switching, Professional (JNCIP-ENT) certification is highly valued by employers and networking professionals and is recognized worldwide as an industry-standard certification. Candidates can prepare for the exam by taking training courses, reading study materials, and practicing with lab exercises.
NEW QUESTION # 99
You are asked to merge a RIP network with your OSPF network. As a first step, you establish connectivity between the RIP network and the OSPF network. The RIP network connects to an NSSA area. Which two statements are true in this scenario? (Choose two.)
- A. By default, external OSPF routes have a higher route preference than RIP routes.
- B. To share RIP routes with the OSPF network, an export policy will be required on the ABR.
- C. Be default, RIP routes have a higher route preference than external OSPF routes.
- D. To share RIP routes with the OSPF network, an export policy will be required on the ASBR.
Answer: A,D
Explanation:
Route Preference Values
OSPF Internal = 10
RIP = 100
OSPF External = 150
NEW QUESTION # 100
Which statement is correct about MSTP?
- A. MSTP uses stacked VLAN tags to extend a Layer 2 Ethernet connection between multiple sites.
- B. MSTP enables dynamic discovery of Layer 2 neighbors.
- C. MSTP dynamically manages VLAN registration in a LAN.
- D. MSTP enables mapping multiple independent spanning-tree instances onto one physical topology.
Answer: D
NEW QUESTION # 101
You are asked to implement fault tolerant RPs in your multicast network. Which two solutions would accomplish this behavior? (Choose two.)
- A. Use BFD with statically defined RPs.
- B. Use MSDP with statically defined RPs.
- C. Use anycast PIM with statically defined RPs.
- D. Use IGMPv3 with statically defined RPs.
Answer: B,C
NEW QUESTION # 102
You enable the Multiple VLAN Registration Protocol (MVRP) to automate the creation and management of virtual LANs.
Which statement is correct in this scenario?
- A. The forbidden mode does not register or declare VLANs.
- B. Timers dictate when link state changes are propagated.
- C. When enabled, MVRP affects all interfaces.
- D. MVRP works with RSTP and VSTP.
Answer: A
Explanation:
MVRP is disabled by default on the switches and, when enabled, affects only trunk interfaces.
Once you enable MVRP, all VLAN interfaces on the switch belong to MVRP (the default normal registration mode) and those interfaces accept PDU messages and send their own PDU messages.
forbidden - The interface does not register or declare VLANS (except statically configured VLANs).
https://www.juniper.net/documentation/us/en/software/junos/mvrp/multicast- l2/topics/concept/mvrp-mx-series-understanding.html
NEW QUESTION # 103
You are configuring BGP policies for a site with a dual-homed connection as shown In the exhibit.
You need all outbound traffic to egress the network through the link to ISP B by default. The ISPs should not be able to override this behavior through BGP attributes.
Which BGP attribute would you modify on the ISP-received routes to accomplish this objective?
- A. local preference
- B. MED
- C. origin
- D. next-hop
Answer: A
NEW QUESTION # 104
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The host that the route is associated with is single-homed to one leaf node.
- B. The host that the route is associated with is multihomed to two leaf nodes.
- C. The route is a Type 1 EVPN route.
- D. The route is a Type 2 EVPN route.
Answer: A,C
NEW QUESTION # 105
Which two statements are correct about a functional ESI LAG interface? (Choose two )
- A. The ESI values must be the same
- B. The LACP system ID must be different
- C. The ESI values must be different
- D. The LACP system ID must be the same
Answer: A,D
NEW QUESTION # 106
In a Layer 2 environment where 802.1X is deployed, which two statements are correct? (Choose two.)
- A. Extensible Authentication Protocol messages are exchanged between the supplicant and the authenticator.
- B. RADIUS messages are exchanged between the authenticator and the authentication server.
- C. Extensible Authentication Protocol messages are exchanged between the authenticator and the authentication server.
- D. RADIUS messages are exchanged between the supplicant and the authenticator.
Answer: A,B
Explanation:
https://en.wikipedia.org/wiki/IEEE_802.1X
NEW QUESTION # 107
A Layer 2 connection does not expend across data centers. The IP subnet in a Layer 2 domain is confined within a single data center.
Which EVPN route type is used to communicate prefixes between the data centers?
- A. Type 1
- B. Type 2
- C. Type 5
- D. Type 4
Answer: C
Explanation:
* Understanding EVPN Route Types:
* EVPN routes facilitate Layer 2 and Layer 3 connectivity across data centers.
* Layer 2 and Layer 3 Connectivity:
* For Layer 3 connectivity across data centers, where Layer 2 does not extend, IP prefixes need to be communicated.
* Type 5 Routes:
* Type 5 (IP Prefix Route):
* Used to distribute IP prefixes between data centers.
* Ensures that Layer 3 connectivity is established without extending Layer 2 domains.
References:
* Juniper EVPN Type 5 Routes
* Configuring EVPN for Data Center Interconnect
NEW QUESTION # 108
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 statement must be configured to accommodate peering to a loopback address of a directly connected peer.
- B. The TTL value of 1 is set to limit the scope of the EBGP session.
- C. Both the next hops will be used to forward traffic to R2.
- D. A routing policy will be required to forward traffic to both next hops.
Answer: A,D
NEW QUESTION # 109
Referring to the outputs shown in the exhibit, which two statements are correct about the IS-IS adjacency? (Choose two.)
- A. R1 is configured to participate in both Level 1 and Level 2.
- B. R2 is configured to participate in Level 2 only.
- C. R2 is configured to participate in both Level 1 and Level 2.
- D. R1 is configured to participate in Level 2 only.
Answer: A,B
NEW QUESTION # 110
You recently implemented the configurations shown in the exhibit. After committing these changes, the community devices connected to AS-1 are not able to communication with the appropriate community devices connected to AS-2.
What must be to allow these community devices to communicate?
- A. You must configure the ge-0/0/1 interface on both switches the inter-switch links.
- B. You must configure an isolation VLAN ID under the vlan-pri VLAN on both switches.
- C. You must configure an isolation VLAN ID under the vlan-pri vlan on the AS-2 switch.
- D. You must configure to allow the ge-0/0/1 interface on AS-1 as the inter-switch.
- E. You must configure the ge-0/0/10 interface on AS-1 as the inter-switch link.
Answer: A
NEW QUESTION # 111
You have configured MSTP in your Layer 2 network.
You are having problems with it establishing correctly.
Referring to the exhibit, what is causing the problem?
- A. The region name is not correct
- B. The MSTI-to-VLAN mapping does not match
- C. You must assign a context ID number other than zero
- D. The revision number is the same on both devices
Answer: B
NEW QUESTION # 112
Referring to the exhibit, how will router E quickly learn that the remote MAC addresses are no longer reachable through the router attached to the failed link?
- A. Router E receives Type 1 withdrawal messages from router D.
- B. Router E receives Type 2 withdrawal messages from router C.
- C. Router E receives Type 1 withdrawal messages from router C.
- D. Router E receives Type 2 withdrawal messages from router D.
Answer: A
NEW QUESTION # 113
You receive the same 100.200.0/16 route from all four ISPs to which you are connected.
Referring to the exhibit, which ISP's route will be selected as active?
- A. ISP-A
- B. ISP-B
- C. ISP-D
- D. ISP-C
Answer: A
NEW QUESTION # 114
Referring to the exhibit, which LSA type is used to advertise 192.168.1.0/24 to R5?
- A. Type 3
- B. Type 7
- C. Type 5
- D. Type 4
Answer: C
Explanation:
Area-1 has no external connections. However, Area-1 has static route (172.16.31.0/24) that are not internal OSPF route. You can limit the external route advertisements to the area and advertise the static routes by designating the area an NSSA. In an NSSA, the ASBR (vMX1) generates NSSA external (Type 7) LSAs and floods them into the NSSA, where they are contained.
Type-7 LSAs allow an NSSA to support the presence of ASBR and their corresponding external routing information. The ABR (vMX2) converts Type-7 LSAs into Type-5 External LSAs and leaks them to the other areas, but external routes from other areas are not advertised within the NSSA.
An admin should check this and change it.
https://www.packetswitch.co.uk/configuring-junos-ospf-stub-and-nssa-areas/
https://www.juniper.net/documentation/us/en/software/junos/ospf/topics/ref/statement/nssa-edit- protocols-ospf.html
NEW QUESTION # 115
BGP multipath or multihop are not configured in your network. In this scenario, what is the correct sequence for BGP active route selection?
- A. higher local preference
shortest AS path
lower origin code
lowest router ID
lowest peer address - B. higher local preference
lowest router ID
lowest peer address
lower origin code
shortest AS path - C. higher local preference
shortest AS path
lowest router ID
lowest peer address
lower origin code - D. higher local preference
shortest AS path
lowest peer address
lowest router ID
lower origin code
Answer: A
Explanation:
BGP Path Selection process follows this order
1.Weight (Bigger is better)
2. Local preference (Bigger is better)
3. Self originated (Locally injected is better than iBGP/eBGP learned)
4. AS-Path (Smaller is better)
5. Origin
6. MED (Smaller is better)
7. External (Prefer eBGP over iBGP)
8. IGP cost (Smaller is better)
9. EBGP Peering (Older is better)
10. Router- ID
http://www.next-itsolutions.co.uk/wp-content/uploads/2015/09/CCIE-BGP-Best-Path- Selection1.png
https://www.juniper.net/documentation/us/en/software/junos/vpn-l2/bgp/topics/concept/routing- protocols-address-representation.html
NEW QUESTION # 116
A Layer 2 connection does not expend across data centers. The IP subnet in a Layer 2 domain is confined within a single data center.
Which EVPN route type is used to communicate prefixes between the data centers?
- A. Type 1
- B. Type 2
- C. Type 5
- D. Type 4
Answer: C
Explanation:
https://www.juniper.net/documentation/us/en/software/junos/evpn-vxlan/topics/concept/evpn-route-type5-understanding.html#:~:text=In%20the%20control%20plane%2C%20EVPN,subnet%20connectivity%20across%20data%20centers.
NEW QUESTION # 117
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. multiple supplicant mode
- B. static MAC bypass mode
- C. single supplicant mode
- D. single-secure supplicant mode
Answer: A,D
Explanation:
Dynamic VLAN assignment using 802.1X authentication relies on vendor-specific attributes (VSAs) to assign VLANs dynamically based on the authentication results. The modes that support using VSAs for dynamic VLAN assignment are:
* Single-Secure Supplicant Mode: This mode supports a single secure client on a port and can use VSAs to dynamically assign VLANs based on the authentication result.
* Multiple Supplicant Mode: This mode supports multiple clients on a single port, each with its own authentication session, and can use VSAs to dynamically assign VLANs.
References:
* The Juniper documentation and configuration guides discuss the capabilities of these modes in supporting dynamic VLAN assignment through VSAs. Specific configuration examples and guidelines can be found in the documents:
* Useful Juniper Commands.txt
* Tech Ops Managed Router Juniper Install Guide
# Example of enabling single-secure supplicant mode
set protocols dot1x authenticator interface ge-0/0/1.0 supplicant multiple
# Example of enabling multiple supplicant mode
set protocols dot1x authenticator interface ge-0/0/1.0 supplicant multiple
NEW QUESTION # 118
Your network is configured for EVPN load balancing on three different access switches During an outage, you notice that not all interfaces are receiving traffic as expected Which two requirements would you validate to identify this problem? (Choose two )
- A. Validate that the all-active flag configured for multiple interfaces on each switch
- B. Validate that the same esi value is configured on multiple interfaces on all switches.
- C. Validate that the same esi value is only configured on one interface per switch
- D. Validate that all-active is configured for only interface per switch
Answer: A,D
NEW QUESTION # 119
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