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| Section | Weight | Objectives |
|---|---|---|
| OSPF | 15-20% | - Configuration, verification and troubleshooting - Route summarization and redistribution - Neighbor formation, area design and LSA types |
| Layer 2 Security | 10-15% | - Layer 2 firewall filters and security features - Port security, MAC limiting and storm control - DHCP snooping, Dynamic ARP Inspection and IP Source Guard |
| High Availability and Resiliency | 5-10% | - Network resiliency design and troubleshooting - Graceful restart and non-stop routing - Redundancy protocols and failover mechanisms |
| IP Multicast | 5-10% | - IGMP operation and configuration - Multicast routing monitoring and troubleshooting - PIM Dense Mode, Sparse Mode and RP mechanisms |
| IS-IS | 10-15% | - Configuration and route exchange - Adjacency establishment, levels and metrics - Scalable enterprise deployment and troubleshooting |
| Protocol Independent Routing | 10-15% | - Routing instances and route selection criteria - Routing tables, static routes and route preference - Basic routing policy and filter operation |
| BGP | 15-20% | - Neighbor relationships and session establishment - Routing policies, filtering and common troubleshooting - Route advertisement, attributes and path selection |
| Layer 2 Switching and VLANs | 15-20% | - VLAN concepts, configuration, trunking and tagging - Spanning Tree Protocol (STP, RSTP, MSTP) operation and configuration - Link Aggregation Groups (LAG) and Virtual Chassis |
| Tunnels and Overlays | 5-10% | - Overlay network design and connectivity - GRE, IP-IP and dynamic tunnel configuration - Tunnel types, encapsulation and operation |
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NEW QUESTION # 44
You enable the point-to-point parameter on your OSPF interface configuration.
In this scenario, what are two benefits of this action? (Choose two.)
Answer: A,D
Explanation:
Configuring interface-type p2p under an OSPF interface tells Junos to treat that interface as a point-to-point network type regardless of the underlying physical medium, which removes the interface from the standard broadcast-network state machine entirely. On a true broadcast network, two routers must first complete a Designated Router and Backup Designated Router election, wait through the associated timers, and only then proceed through 2-Way, ExStart, Exchange, and Loading before reaching Full - a multi-step process. A point-to-point interface skips DR/BDR election altogether and proceeds directly from 2-Way into ExStart, so adjacencies form measurably faster, which is the first correct benefit. Because there is no DR on a point-to- point interface, Junos also does not generate a Type 2 Network LSA to describe the segment; the connected subnet is instead advertised as a simple stub-network entry inside the Router LSA itself, eliminating an entire LSA type from the area's link-state database and reducing its overall size, which is the second correct benefit.
Point-to-point configuration is entirely incompatible with DR election, so a router configured this way cannot
'win' a DR election - there is no DR to win. Advertisement of the connected network happens on any operational OSPF interface irrespective of network type, so that option describes normal OSPF behavior rather than a benefit specific to the point-to-point setting. Reference topics: Junos Enterprise Routing - OSPF Network Types, Configuring OSPF Interface Type.
NEW QUESTION # 45
Which two fields must match in an OSPF hello packet to form an adjacency over a broadcast link? (Choose two.)
Answer: A,C
Explanation:
RFC 2328 specifies a precise set of parameters that two OSPF routers on a broadcast network must agree upon before a valid neighbor relationship can be established, and a mismatch in any of these mandatory fields causes the routers to reject each other's Hello packets outright rather than forming even a basic 2-Way state.
The network mask carried in each Hello packet must match between neighbors on a broadcast segment, since OSPF uses this field to confirm both routers agree on the subnet boundaries of the shared segment; a mismatched mask (for example, one router configured with a /24 and its neighbor with a /25 on the same physical wire) is treated as a configuration error and blocks adjacency formation. The router dead interval, which defines how long a router will wait without receiving a Hello before declaring a neighbor down, must likewise match exactly between neighbors, alongside the closely related hello interval, since these timers govern the shared expectations both sides have for how frequently Hellos should arrive and how quickly a failure should be detected; Junos explicitly checks and rejects Hello packets carrying a mismatched dead interval value. Router priority, by contrast, is intentionally allowed to differ between neighbors on the same segment - it exists precisely so that administrators can differentiate router preference for the DR/BDR election, and differing values are expected and normal rather than being blocked. The designated router field, as advertised within each Hello, is informational about the sender's current view of the segment's DR and is not a value that must be identical between the two Hello senders to permit adjacency formation. Reference topics: Junos Enterprise Routing - OSPF, Required Hello Parameter Matching on Broadcast Networks.
NEW QUESTION # 46
You are creating an aggregated Ethernet bundle using LACP on your Juniper Networks EX Series device. In this scenario, which statement is correct?
Answer: D
Explanation:
IEEE 802.3ad LACP defines two distinct negotiation modes, active and passive, and the standard's fundamental requirement for successful negotiation is that at least one end of the point-to-point link must be configured in active mode; an actively configured device initiates LACPDU transmission on its own, while a passively configured device waits and only responds once it receives an LACPDU from its peer. If both ends of the bundle were left in passive mode simultaneously, neither side would ever initiate the exchange, and no negotiation -- and therefore no functioning aggregated bundle -- would ever occur; at least one active participant is therefore mandatory, though having both sides active (active-active) is also fully valid and is in fact the most common production deployment. Junos does not enable LACP automatically on aggregated Ethernet interfaces; unlike some competing platforms, LACP must be explicitly configured under the aggregated-ether-options lacp hierarchy, and specifying no LACP configuration at all results in a 'static' LAG that relies purely on physical link-state rather than any protocol negotiation -- there is no implicit default active mode. There is likewise no requirement to configure differing LACP system priority values between the two peer switches; system priority is used only to determine which side of the link controls port selection during negotiation and has no bearing on whether the bundle can form. Both sides being mandatorily active is a stricter requirement than the actual standard specifies.
NEW QUESTION # 47
What does the * indicate in the output shown in the exhibit?
Answer: A
Explanation:
The exhibit shows the output of the command show vlans brief, which displays brief information about VLANs and their associated interfaces.
The output has four columns: Routing instance, VLAN name, Interfaces, and Tagging. The * symbol indicates that the interface is active, meaning that it is up and forwarding traffic. This can be verified by the command show interfaces terse, which displays the status of the interfaces.
NEW QUESTION # 48
Your ISP is announcing a default route to both R1 and R2. You want your network routers to forward all Internet traffic through the R1 device.
Which BGP attribute would you use?
Answer: C
Explanation:
The BGP attribute that you would use to forward all Internet traffic through the R1 device is the local preference.
The local preference is an attribute that is used within an autonomous system (AS) and exchanged between iBGP routers. It is used to select an exit point from the AS. The path with the highest local preference is preferred. By setting a higher local preference for the routes received from R1, you can make R1 the preferred exit point for all Internet traffic.
NEW QUESTION # 49
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