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| Section | Objectives |
|---|---|
| Topic 1: High Availability | - High availability design and integration - VRRP and redundancy protocols |
| Topic 2: BGP | - BGP configuration and troubleshooting |
| Topic 3: IS-IS | - IS-IS configuration and troubleshooting |
| Topic 4: Layer 2 Switching or VLANs | - Configuration, monitoring, and troubleshooting - Ports and tagging - VLAN concepts and functionalities - Bridging components - Inter-VLAN routing - Frame processing - Native VLANs and voice VLANs |
| Topic 5: OSPF | - OSPF configuration and troubleshooting |
| Topic 6: Layer 2 Security | - Dynamic ARP inspection - Common Layer 2 attack mitigation - DHCP snooping - Port security implementation |
| Topic 7: Protocol Independent Routing | - Routing fundamentals |
| Topic 8: Spanning Tree Protocol | - Port roles interpretation - STP topology design and troubleshooting - Bridge priority and port cost optimization - Convergence issues identification - Loop prevention and redundancy |
| Topic 9: Tunnels | - Tunnel technologies |
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NEW QUESTION # 116
You are attempting to configure the initial two aggregated Ethernet interfaces on a router but there are no aggregated Ethernet interfaces available.
In this scenario, which configuration will enable these interfaces on this router?
Answer: D
Explanation:
Device count should be more than 1.
NEW QUESTION # 117
Exhibit.
You are using OSPF to advertise the subnets that are used by the Denver and Dallas offices. The routers that are directly connected to the Dallas and Denver subnets are not advertising the connected subnets.
Referring to the exhibit, which two statements are correct? (Choose two.)
Answer: B,C
Explanation:
The routers that are directly connected to the Dallas and Denver subnets are not advertising the connected subnets. This can be resolved by redistributing the connected subnets into OSPF 1 .
Option C suggests to configure and apply a routing policy that redistributes the connected Dallas and Denver subnets. This is correct because redistribution allows routes from one routing protocol to be communicated to another, and in this case, it allows the connected subnets to be advertised through OSPF 1 .
Option D suggests enabling the passive option on the OSPF interfaces that are connected to the Dallas and Denver subnets. This is also correct because in OSPF, a passive interface is an interface that belongs to the OSPF router, but does not send OSPF Hello packets 1 . It's typically used on an interface that you don't want to use for OSPF adjacencies, but you still want to advertise its IP address 1 . Therefore, enabling passive interface can help in advertising the Dallas and Denver subnets.
NEW QUESTION # 118
What are two purposes of an aggregate route? (Choose two.)
Answer: A,C
Explanation:
An aggregate route is a route that summarizes multiple more specific routes into a single route advertisement.
For example, an aggregate route to 10.0.0.0/8 can represent many routes to 10.x.x.x/24 subnets. An aggregate route has several purposes, such as:
To decrease the number of route advertisements: By consolidating multiple routes into one, an aggregate route reduces the size of the routing table and the amount of routing updates that need to be exchanged between routers. This can improve the scalability and efficiency of the network12.
To hide internal routes from external peers: By advertising only the aggregate route and not the more specific routes, an aggregate route can provide a level of abstraction and security for the internal network topology. This can prevent external peers from knowing the details of the internal routes and avoid potential attacks or misconfigurations13.
The other options are not correct because:
C). To allow external peers to see internal routes: This is the opposite of what an aggregate route does. An aggregate route hides the internal routes from external peers, not exposes them13.
D). To increase the number of route advertisements: This is also the opposite of what an aggregate route does. An aggregate route decreases the number of route advertisements, not increases them12.
References: Configuring Route Aggregation | Junos OS, JunOS Aggregate and Generate Routes - Network Direction, Aggregate Routes vs Generated Routes. | Junos OS - Juniper Networks
NEW QUESTION # 119
You have DHCP snooping enabled but no entries are automatically created in the snooping database for an interface on your EX Series switch. What are two reasons for the problem?
(Choose two.)
Answer: B,D
Explanation:
If the device connected to the interface has performed a DHCPRELEASE, it releases its IP address back to the DHCP server, resulting in the removal of the corresponding DHCP snooping entry.
If the device connected to the interface is using a static IP address, it will not send DHCP requests, and therefore no entries will be created in the DHCP snooping database for that device.
NEW QUESTION # 120
You deployed a new EX Series switch with DHCP snooping enabled and you do not see any entries in the snooping databases for an interface. Which two Juniper configurations for that interface caused this issue?
(Choose two.)
Answer: B,D
Explanation:
A is correct because the interface is configured as a disabled port. A disabled port does not forward any traffic, including DHCP packets. Therefore, DHCP snooping cannot learn any MAC addresses or lease information from a disabled port1.
C is correct because the interface is configured as a trunk port. By default, all trunk ports on the switch are trusted for DHCP snooping2. This means that DHCP snooping does not inspect or filter any DHCP packets received on a trunk port. Therefore, DHCP snooping does not add any entries to the snooping database for a trunk port2.
NEW QUESTION # 121
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