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| Section | Objectives |
|---|---|
| Topic 1: Spanning Tree Protocol | - Root bridge, port roles and states - Configuration, monitoring and troubleshooting - STP, RSTP, MSTP concepts and operation |
| Topic 2: BGP | - Configuration, monitoring and troubleshooting - BGP concepts, attributes, path selection - IBGP, EBGP, route policies |
| Topic 3: Layer 2 Switching and VLANs | - Configuration, monitoring and troubleshooting - Layer 2 switching concepts and operation - Inter-VLAN routing - VLAN concepts, tagging, ports, native VLAN |
| Topic 4: High Availability | - Configuration, monitoring and troubleshooting - Graceful restart, nonstop active routing - Virtual Chassis, redundant routing engines |
| Topic 5: Tunnels | - Configuration, monitoring and troubleshooting - IP-IP, GRE, IPsec tunnels |
| Topic 6: Protocol Independent Routing | - Configuration, monitoring and troubleshooting - Static routes, aggregate routes - Routing policy and firewall filters - Routing tables, routing preferences |
| Topic 7: OSPF | - Configuration, monitoring and troubleshooting - OSPFv2/v3 concepts, areas, LSA types - Neighbor relationships, route calculation |
| Topic 8: Layer 2 Security | - Configuration, monitoring and troubleshooting - Dynamic ARP inspection, DHCP snooping - Port security, storm control, MAC limiting - Layer 2 firewall filters |
| Topic 9: IS-IS | - Configuration, monitoring and troubleshooting - IS-IS concepts, levels, routing information |
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NEW QUESTION # 158
You have two OSPF routers that will not form an adjacency. You enter the show log trace-ospf command.
Referring to the exhibit, which statement is correct?
Answer: B
NEW QUESTION # 159
Which two statements about redundant trunk groups on EX Series switches are correct? (Choose two.)
Answer: A,B
Explanation:
Redundant trunk groups are designed to provide link redundancy. If the primary link fails, the secondary link will automatically take over to ensure continued connectivity.
In redundant trunk groups, while regular data traffic is sent over the primary link, Layer 2 control traffic (such as STP, LACP, etc.) is allowed on the secondary link to maintain network stability and protocol operations.
https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topic- map/redundant-trunk-groups.html
NEW QUESTION # 160
What is the default MAC age-out timer on an EX Series switch?
Answer: C
Explanation:
The default MAC age-out timer on an EX Series switch is 300 seconds. The MAC age-out timer is the maximum time that an entry can remain in the MAC table before it "ages out," or is removed.
This configuration can influence efficiency of network resource use by affecting the amount of traffic that is flooded to all interfaces. When traffic is received for MAC addresses no longer in the Ethernet routing table, the router floods the traffic to all interfaces.
NEW QUESTION # 161
Which two statements are correct about aggregate routes in Junos OS? (Choose two.)
Answer: A,C
Explanation:
Similar to generated routes, an aggregate route in Junos OS becomes active in the routing table only when at least one contributing (more specific) route matching the aggregate is present.
Administrators can apply a policy to an aggregate route configuration to control which specific contributing routes are eligible to trigger the aggregate, and aggregate routes are commonly configured with a "discard" next hop to prevent routing loops for unused portions of the aggregated address space.
NEW QUESTION # 162
An update to your organization ' s network security requirements document requires management traffic to be isolated in a non-default routing-instance. You want to implement this requirement on your Junos-based devices.
Which two commands enable this behavior? (Choose two.)
Answer: A,B
Explanation:
To isolate management traffic in a non-default routing-instance on Junos-based devices, you can use the set system management-instance and set routing-instances mgmt_junos commands 1 2 .
* set system management-instance : This command associates the management interface (usually named fxp0 or em0 for Junos OS, or re0:mgmt-* or re1:mgmt-* for Junos OS Evolved) with the non-default virtual routing and forwarding (VRF) instance 1 . After you configure the non-default management VRF instance, management traffic no longer has to share a routing table with other control traffic or protocol traffic 1 .
* set routing-instances mgmt_junos : This command creates a new routing instance named mgmt_junos
. The name of the dedicated management VRF instance is reserved and hardcoded as mgmt_junos ; you cannot configure any other routing instance by the name mgmt_junos 1 .
Therefore, options C and D are correct. Options A and B are not correct because they attempt to assign an interface to the mgmt_junos routing instance, which is not necessary for isolating management traffic 1 .
NEW QUESTION # 163
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