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NEW QUESTION # 43
Which two multicast IP addresses are used for link-state update packets? (Choose two.)
- A. 224.0.0.9
- B. 224.0.0.5
- C. 224.0.0.10
- D. 224.0.0.6
Answer: B,D
Explanation:
Link-state update packets are used to flood link-state advertisements (LSAs) among OSPF routers. The destination IP address of these packets depends on the network type and the state of the interface. On broadcast and point-to-point networks, OSPF uses two IP multicast addresses: 224.0.0.5 for all OSPF routers and 224.0.0.6 for all designated routers (DRs) and backup designated routers (BDRs)12. If the interface state is DR or BDR, the link-state update packets are sent to 224.0.0.5. Otherwise, they are sent to 224.0.0.63. On non-broadcast networks, such as Frame Relay or ATM, link-state update packets are sent as unicasts to each adjacent neighbor3. Therefore, the correct answer is A and D. References: Understanding OSPF Areas | Junos OS, How OSPF Works - IP Routing [Book] - O'Reilly Media, Link state packet - Wikipedia
NEW QUESTION # 44
You are using tunnels in your network. It is important that the routes be specific enough to ensure that the tunnels are established. You need to prevent a route that is new to the network from being used.
In this scenario, which type of route should be used?
- A. multicast
- B. static
- C. aggregate
- D. anycast
Answer: B
NEW QUESTION # 45
Which statement is correct about the IS-IS ISO NET address?
- A. The Area ID must match on all devices within a L2 area.
- B. An ISO NET address defined with a system ID of 0000.0000.0000 must be selected as the DIS.
- C. An ISO NET address must be unique for each device in the network.
- D. You can only define a single ISO NET address per device.
Answer: C
Explanation:
An ISO NET address is a type of network address used by the IS-IS routing protocol. It identifies a point of connection to the network, such as a router interface, and is also called a Network Service Access Point (NSAP).
An ISO NET address consists of three parts: an area ID, a system ID, and a selector. The area ID identifies the IS-IS area to which the device belongs. The system ID uniquely identifies the device within the area. The selector identifies a specific service or function on the device, such as routing or management.
An ISO NET address must be unique for each device in the network, because it is used by IS-IS to establish adjacencies, exchange routing information, and compute shortest paths. If two devices have the same ISO NET address, they will not be able to communicate with each other or with other devices in the network. Therefore, it is important to assign different ISO NET addresses to each device in the network.
NEW QUESTION # 46
Exhibit.
The ispi _ inet. 0 route table has currently no routes in it.
What will happen when you commit the configuration shown on the exhibit?
- A. The inet. 0 route table will be completely overwritten by the ispi . inet. 0 route table.
- B. The ISPI . inet. 0 route table will be completely overwritten by the inet. o route table.
- C. The ISPI . inet. 0 route table will be imported into the inet. 0 route table.
- D. The inet. 0 route table will be imported into the ispi . inet. 0 route table.
Answer: D
Explanation:
The configuration shown in the exhibit is an example of a routing instance of type virtual-router. A routing instance is a collection of routing tables, interfaces, and routing protocol parameters that create a separate routing domain on a Juniper device 1 . A virtual-router routing instance allows administrators to divide a device into multiple independent virtual routers, each with its own routing table 2 .
The configuration also includes a rib-group statement, which is used to import routes from one routing table to another. A rib-group consists of an import-rib statement, which specifies the source routing table, and an export-rib statement, which specifies the destination routing table.
In this case, the rib-group name is inet-to-ispi, and the import-rib statement specifies inet.0 as the source routing table. The export-rib statement specifies ispi.inet.0 as the destination routing table. This means that the routes from inet.0 will be imported into ispi.inet.0.
Therefore, the correct answer is B. The inet.0 route table will be imported into the ispi.inet.0 route table.
References:
1 : Routing Instances Overview 2 : Virtual Routing Instances : [rib-group (Routing Options)]
NEW QUESTION # 47
Referring to the exhibit, which two statements are correct? (Choose two.)
- A. The ge-0/0/10 interface will not participate in the RSTP topology.
- B. The ge-0/0/10 interface will be part of the RSTP topology but will block incoming BPDUs.
- C. This device must be selected as the root bridge.
- D. The ge-0/0/13 interface will be selected as the forwarding interface.
Answer: A,D
NEW QUESTION # 48
Which two statements about the firewall filter terms shown in the exhibit are true? (Choose two.)
- A. Traffic that matches the fromstatement in term oneis discarded.
- B. Traffic matching the fromstatement in term twois logged.
- C. Traffic that matches the fromstatement in term oneis accepted.
- D. All traffic not matching the fromstatement in term oneis accepted by term two.
Answer: C,D
NEW QUESTION # 49
What are two interarea OSPF LSA types? (Choose two.)
- A. Type 2 network LSAs
- B. Type 4 ASBR summary LSAs
- C. Type 3 summary LSAs
- D. Type 1 router LSAs
Answer: B,C
NEW QUESTION # 50
Exhibit.
The ispi _ inet. 0 route table has currently no routes in it.
What will happen when you commit the configuration shown on the exhibit?
- A. The inet. 0 route table will be completely overwritten by the ispi . inet. 0 route table.
- B. The ISPI . inet. 0 route table will be completely overwritten by the inet. o route table.
- C. The ISPI . inet. 0 route table will be imported into the inet. 0 route table.
- D. The inet. 0 route table will be imported into the ispi . inet. 0 route table.
Answer: D
Explanation:
Explanation
The configuration shown in the exhibit is an example of a routing instance of type virtual-router. A routing instance is a collection of routing tables, interfaces, and routing protocol parameters that create a separate routing domain on a Juniper device1. A virtual-router routing instance allows administrators to divide a device into multiple independent virtual routers, each with its own routing table2.
The configuration also includes a rib-group statement, which is used to import routes from one routing table to another. A rib-group consists of an import-rib statement, which specifies the source routing table, and an export-rib statement, which specifies the destination routing table.
In this case, the rib-group name is inet-to-ispi, and the import-rib statement specifies inet.0 as the source routing table. The export-rib statement specifies ispi.inet.0 as the destination routing table. This means that the routes from inet.0 will be imported into ispi.inet.0.
Therefore, the correct answer is B. The inet.0 route table will be imported into the ispi.inet.0 route table.
References:
1: Routing Instances Overview 2: Virtual Routing Instances : [rib-group (Routing Options)]
NEW QUESTION # 51
Exhibit
Your BGP neighbors, one in the USA and one in France, are not establishing a connection with each other.
Referring to the exhibit, which statement is correct?
- A. The BFD liveness must be configured on the BGP group.
- B. The BFD liveness must be configured on the BGP neighbor.
- C. The BFD liveness is set too high.
- D. The BFD liveness is set too low.
Answer: B
Explanation:
* The exhibit shows the configuration of BFD liveness detection for BGP at the global level, which applies to all BGP neighbors by default 1 . However, this configuration does not specify the session mode, which determines whether BFD uses single-hop or multihop mode to communicate with a neighbor 2 .
* For single-hop BGP neighbors, which are directly connected on the same subnet, the session mode can be either automatic or single-hop. For multihop BGP neighbors, which are not directly connected and require multiple hops to reach, the session mode must be multihop 2 .
* Since your BGP neighbors are in different countries, they are likely to be multihop neighbors. Therefore, you need to configure the session mode as multihop for each neighbor individually at the [edit protocols bgp group group-name neighbor address bfd-liveness-detection] hierarchy level 2 . For example:
protocols { bgp { group usa { neighbor 192.0.2.1 { bfd-liveness-detection { session-mode multihop; } } } group france { neighbor 198.51.100.1 { bfd-liveness-detection { session-mode multihop; } } } } }
* If you do not configure the session mode for multihop neighbors, BFD will use the default mode of automatic, which will try to use single-hop mode and fail to establish a BFD session with the remote neighbor 2 . This will prevent BGP from using BFD to detect liveliness and failover.
* Therefore, the answer B is correct, as you need to configure the BFD liveness detection on the BGP neighbor level with the appropriate session mode for multihop neighbors.
NEW QUESTION # 52
Referring to the exhibit, why is the route for 10.5.5.5 hidden?
- A. It has an invalid community.
- B. It is a martian route.
- C. It is an L3VPN route.
- D. The next hop cannot be resolved.
Answer: D
NEW QUESTION # 53
You have two OSPF routers that will not form an adjacency. You enter the show log trace- ospfcommand.
Referring to the exhibit, which statement is correct?
- A. You are stuck in the ExStart state.
- B. The wrong OSPF area has been configured.
- C. The physical connection has been disconnected.
- D. There is a mismatched subnet.
Answer: B
NEW QUESTION # 54
Referring to the exhibit, all users connected to the same VLAN can communicate with each other, but not with users on other VLANs in this network.
What must be configured to enable communication between the VLANs?
- A. A logical IRB interface must be created and assigned to each VLAN.
- B. A single logical IRB interface must be created and assigned to all three VLANs.
- C. The switch ports to which the users are connected should be configured as trunk ports.
- D. A separate routing device is required to forward traffic between the configured VLANs.
Answer: A
NEW QUESTION # 55
Which two statements are correct about martian routes? (Choose two.)
- A. Martian routes are always host addresses.
- B. Martian routes are never installed in the route table.
- C. Additional prefixes can be added to the list of martian routes.
- D. Martian routes only represent publicly used prefixes.
Answer: B,C
Explanation:
Martian routes are never installed in the route table.
Martian routes refer to IP addresses or prefixes that are considered invalid or reserved, and they are not installed in the routing table.
Additional prefixes can be added to the list of martian routes.
Network administrators can configure the system to treat additional prefixes as Martian routes based on specific network policies or requirements.
NEW QUESTION # 56
You are asked to create a default route that will be advertised to your internal OSPF neighbors. You have three upstream connections to the Internet and you must ensure that when available, all traffic uses ISP1 as your primary connection and only uses ISP2 and ISP3 when ISP1 is not available.
Which solution should you implement in this scenario?
- A. Create a default static route with each neighbor address as the next hop.
- B. Create a default generate route that includes an import policy to match BGP routes from ISP1 and assign a preference value of four or less.
- C. Create a default static route with ISP1 ' s address as the next hop while specifying the addresses for ISP2 and ISP3 as qualified next hops with a preference value of six or higher.
- D. Create a default aggregated route.
Answer: C
Explanation:
The solution that should be implemented in this scenario is to create a default generate route that includes an import policy to match BGP routes from ISP1 and assign a preference value of four or less. This way, the default route will be advertised to the internal OSPF neighbors only when there is a BGP route from ISP1 in the routing table, and it will have a higher preference than any other default route from ISP2 or ISP3. If ISP1 is not available, the default generate route will be withdrawn and the traffic will use the next available default route from ISP2 or ISP3.
Option A is incorrect because creating a default static route with ISP1's address as the next hop while specifying the addresses for ISP2 and ISP3 as qualified next hops with a preference value of six or higher will not ensure that the default route is advertised to the internal OSPF neighbors only when ISP1 is available. The default static route will always be in the routing table regardless of the availability of ISP1, and it will have a lower preference than any other default route from ISP2 or ISP3.
Option C is incorrect because creating a default static route with each neighbor address as the next hop will not ensure that all traffic uses ISP1 as the primary connection and only uses ISP2 and ISP3 when ISP1 is not available. The default static route will always be in the routing table regardless of the availability of ISP1, and it will load balance the traffic among the three ISPs.
Option D is incorrect because creating a default aggregated route will not ensure that the default route is advertised to the internal OSPF neighbors only when ISP1 is available. The default aggregated route will always be in the routing table regardless of the availability of ISP1, and it will not have any preference value associated with it. References:
* Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks
* Enterprise Routing and Switching, Specialist (JNCIS-ENT) - Juniper Networks
NEW QUESTION # 57
You are deploying a trunk port with multiple VLANs.
In this scenario, which statement is true about the native VLAN?
- A. The native VLAN is the highest tagged VLAN ID on the port.
- B. The native VLAN must be the default VLAN on the port.
- C. The native VLAN is an untagged VLAN ID on the port.
- D. The native VLAN is automatically configured through DHCP.
Answer: C
Explanation:
In a trunk port configuration with multiple VLANs, the native VLAN carries untagged traffic. This means frames sent or received on the port without a VLAN tag are automatically assigned to the native VLAN.
Here ' s why the other options are incorrect:
* A. The native VLAN must be the default VLAN on the port. This is not necessarily true. The native VLAN and the default VLAN can be different. The default VLAN is the VLAN assigned to untagged traffic on access ports, while the native VLAN applies to trunk ports.
* B. The native VLAN is automatically configured through DHCP. This is incorrect. The native VLAN needs to be manually configured on the switch port. DHCP is used for assigning IP addresses, not VLAN IDs.
* D. The native VLAN is the highest tagged VLAN ID on the port. This is also incorrect. The native VLAN and tagged VLANs are independent. The native VLAN is not related to the highest or lowest tagged VLAN ID.
Therefore, the only true statement is that the native VLAN is an untagged VLAN ID on the port.
:
Trunk Ports and VLANs: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/15-
0_2_EX/vlan/configuration_guide/b_vlan_152ex_2960-x_cg/b_vlan_152ex_2960-x_cg_chapter_0100.pdf Configuring Trunk Ports: https://community.cisco.com/t5/networking-knowledge-base/how-to-define-the- vlans-allowed-on-a-trunk-link/ta-p/3131083 Understanding Native VLANs: https://www.practicalnetworking.net/tag/vlans/
NEW QUESTION # 58
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