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| Section | Objectives |
|---|---|
| Topic 1: Protocol-Independent Routing | - Martian addresses and RIB groups - Load balancing and filter-based forwarding - Static, aggregate, generated routes |
| Topic 2: High Availability | - Virtual chassis and graceful restart - VRRP, NSR, NSB and BFD - Link Aggregation Groups and RTG |
| Topic 3: Spanning Tree | - Bridge Protocol Data Units (BPDUs) - STP and RSTP concepts, roles and states - Convergence and reconvergence |
| Topic 4: BGP | - Attributes and path selection - BGP basic operations and message types - EBGP and IBGP peer interactions |
| Topic 5: Layer 2 Switching and VLANs | - Ports and VLAN tagging - Inter-VLAN routing - Native VLANs and voice VLANs - Frame processing - Bridging components |
| Topic 6: OSPF | - Areas and LSA types - Router ID, adjacencies and neighbors - Link-state database and packet types |
| Topic 7: Tunnels | - IP tunneling concepts - GRE and IP-IP configuration and troubleshooting |
| Topic 8: Layer 2 Security | - BPDU, loop and root protection - Layer 2 firewall filters - Port security (MAC limiting, DHCP snooping, DAI, IP source guard) - MACsec and storm control |
| Topic 9: IS-IS | - Levels, areas and metrics - Adjacencies and troubleshooting - Link-state database and PDUs |
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NEW QUESTION # 51
You are combining two existing interfaces into a single LAG interface, but you do not see the LAG interface being created. Which two actions are required to solve this problem? (Choose two.)
Answer: B,C
NEW QUESTION # 52
Which two statements describe OSPF DR and BDR behavior? (Choose two.)
Answer: B,C
Explanation:
The Backup Designated Router exists specifically to provide immediate failover redundancy for the Designated Router role on a multi-access broadcast or NBMA segment: the BDR maintains full adjacencies with every other router on the segment concurrently with the DR, precisely so that if the DR ever fails or is withdrawn, the BDR can be promoted directly to DR essentially instantaneously, without needing to wait through a fresh, full DR/BDR election process, and a new BDR election then takes place separately among the remaining DROther routers to fill the now-vacant backup role. This immediate promotion behavior confirms the first statement as correct. The Designated Router's other core responsibility on the segment is originating the Type 2 Network LSA, which describes the multi-access network itself as a pseudonode, listing every router attached to that segment; this LSA type exists specifically to avoid the full-mesh explosion of Router LSA adjacency listings that would otherwise be needed to describe a shared broadcast segment, and only the DR - never the BDR, and never any DROther - is responsible for generating and maintaining this particular LSA under normal, stable conditions, which confirms the third statement while directly ruling out the fourth. There is no such thing as the DR 'electing' an area border router; ABR status is instead a role a router acquires organically by having interfaces in more than one OSPF area, entirely independent of any DR
/BDR election process on any individual segment. Reference topics: Junos Enterprise Routing - OSPF, DR
/BDR Roles and Type 2 Network LSA Origination.
NEW QUESTION # 53
Both the R1 and R2 devices are advertising prefix X into AS 65530 with the BGP attributes shown in the exhibit.
Which statement is correct in this scenario?
Answer: B
NEW QUESTION # 54
Your switches are managed using Junos Space Network Director. You want to secure the switches using a Network Director filter profile. A filter profile containing one term shown in the exhibit is deployed to ports on managed devices.
Which traffic will be accepted by the filter?
Answer: A
NEW QUESTION # 55
Your network has two ISPs available. You want to ensure that all outbound traffic is routed out ISP-1. If the connection to ISP-1 fails, all outbound traffic is routed to the backup ISP, ISP-2. In this scenario, how should you configure BGP on your network?
Answer: A
NEW QUESTION # 56
......
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