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| Section | Weight | Objectives |
|---|---|---|
| Protocol Independent Routing | 10-15% | - Basic routing policy and filter operation - Routing tables, static routes and route preference - Routing instances and route selection criteria |
| BGP | 15-20% | - Neighbor relationships and session establishment - Routing policies, filtering and common troubleshooting - Route advertisement, attributes and path selection |
| IS-IS | 10-15% | - Adjacency establishment, levels and metrics - Configuration and route exchange - Scalable enterprise deployment and troubleshooting |
| OSPF | 15-20% | - Neighbor formation, area design and LSA types - Route summarization and redistribution - Configuration, verification and troubleshooting |
| Layer 2 Switching and VLANs | 15-20% | - Spanning Tree Protocol (STP, RSTP, MSTP) operation and configuration - Link Aggregation Groups (LAG) and Virtual Chassis - VLAN concepts, configuration, trunking and tagging |
| IP Multicast | 5-10% | - IGMP operation and configuration - PIM Dense Mode, Sparse Mode and RP mechanisms - Multicast routing monitoring and troubleshooting |
| High Availability and Resiliency | 5-10% | - Graceful restart and non-stop routing - Redundancy protocols and failover mechanisms - Network resiliency design and troubleshooting |
| Tunnels and Overlays | 5-10% | - GRE, IP-IP and dynamic tunnel configuration - Tunnel types, encapsulation and operation - Overlay network design and connectivity |
| Layer 2 Security | 10-15% | - Layer 2 firewall filters and security features - DHCP snooping, Dynamic ARP Inspection and IP Source Guard - Port security, MAC limiting and storm control |
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NEW QUESTION # 150
Click the Exhibit button. Devices on VLAN 5 and VLAN 7 need to communicate with each other.
Referring to the exhibit, what will satisfy this requirement?
Answer: C
Explanation:
VLAN 5 and VLAN 7 are two entirely separate Layer 2 broadcast domains, each with its own distinct IP subnet, and devices in one VLAN can never reach devices in the other through switching alone -- Layer 3 routing between the two subnets is mandatory for any inter-VLAN communication to occur, regardless of how the VLANs are configured at Layer 2. On a single EX Series switch, the correct and standard mechanism for enabling this routing without an external router is to create one integrated routing and bridging (IRB) logical interface for each VLAN, assign each IRB the appropriate gateway IP address for its respective subnet (192.168.5.1 for VLAN 5's irb.5 and 192.168.7.1 for VLAN 7's irb.7, for example), and ensure routing is active on the switch so that traffic arriving at one IRB's gateway address destined for the other VLAN's subnet is routed internally between the two IRB interfaces. Attempting to bind a single family inet interface with two distinct subnet addresses via secondary addressing conflates two separate broadcast domains onto one Layer 3 interface incorrectly and is not how VLAN routing is architected in Junos. Spanning tree exists purely to prevent Layer 2 loops and has no routing function whatsoever, so configuring it cannot enable inter-VLAN reachability. Placing both VLANs on a single trunk with Multiple VLAN Registration Protocol (MVRP) only automates VLAN membership propagation across trunk links; it does not provide any Layer 3 routing capability between the VLANs either.
NEW QUESTION # 151
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?
Answer: D
NEW QUESTION # 152 
Click the Exhibit button.
Which two statements about the IS-IS output shown in the exhibit are correct? (Choose two.)
Answer: A,D
Explanation:
This detailed adjacency output shows R3 maintaining four separate, fully Up adjacencies, evenly split between the two IS-IS levels. R1 and R2 are both formed at Level 1, confirming that R3 is directly adjacent to exactly two Level 1 neighbors within its local area, which validates that statement. R4 and R5 are both formed at Level 2, and Level 2 adjacencies are, by definition, part of the IS-IS backbone that interconnects areas; a router maintaining any Level 2 adjacency is by that fact participating in and connected to the Level 2 backbone, confirming R3's backbone connectivity as well. Every one of the four listed adjacencies explicitly shows 'Speaks: IP, IPv6' in its detail output, which is Junos's way of indicating that both the IPv4 and IPv6 address families have been successfully negotiated and are active over that circuit; this directly contradicts, rather than supports, the claim that IPv6 is disabled on these neighbors - if IPv6 were disabled, the Speaks field would list only IP. Regarding authentication, the output contains no field, flag, or indication whatsoever referencing authentication configuration or state for the R5 adjacency (or any adjacency); Junos would typically surface authentication-related information separately if it were configured and relevant, and its complete absence here means no basis exists in the exhibit to conclude authentication is required for that specific adjacency. Reference topics: Junos Enterprise Routing - IS-IS, Level 1 and Level 2 Adjacencies and Address Family Negotiation.
NEW QUESTION # 153
Click the Exhibit button. You are troubleshooting an aggregated Ethernet interface on a Juniper Networks EX Series Switch. The aggregated Ethernet interface does not appear in the output shown in the exhibit. Which action will solve this problem?
Answer: D
Explanation:
On EX Series switches, aggregated Ethernet (ae) interfaces do not exist by default; before any ae interface can be created, referenced, or brought into service, an administrator must first reserve the desired number of aggregated Ethernet device slots by configuring set chassis aggregated- devices ethernet device-count number at the [edit chassis] hierarchy. This statement allocates the internal resources needed for that many ae interfaces to exist as valid, configurable objects; until it is committed, any interface-level configuration referencing ae0 (such as the aggregated-ether- options and family ethernet-switching stanzas shown in the exhibit) is accepted syntactically by the CLI but never actually instantiates a live ae0 device, which is exactly why show interfaces ae0.0 returns 'device ae0 not found' despite the interface appearing fully configured. Increasing the device-count to at least 1 (or higher, to cover the number of LAG bundles planned) immediately resolves this and allows ae0 to appear as an operational interface once its member links are also associated with it. This is a foundational and frequently overlooked prerequisite step in LAG deployment on Juniper switches. There is no separate licensing requirement for aggregated Ethernet functionality on EX Series switches, a reboot is not needed since the chassis statement takes effect upon commit, and the LACP mode (active versus passive) is unrelated to whether the ae interface object itself exists in the first place.
NEW QUESTION # 154
You are configuring a GRE tunnel between Router A (192.168.1.1) and Router B (192.168.2.1) to connect two isolated networks. The tunnel interfaces (gr-0/0/0) need to support IPv4 traffic. In this scenario, which configuration ensures the tunnel endpoints are correctly defined and reachable?
Answer: B
Explanation:
A functioning GRE tunnel interface in Junos requires, at minimum, both a tunnel source address and a tunnel destination address configured together under the tunnel statement of the gr- logical unit, since these two values together define the outer, delivery-layer IP header that will encapsulate every passenger packet sent through the tunnel; the source identifies which of the router's own addresses will originate the encapsulated traffic, and the destination identifies the remote tunnel endpoint the encapsulated traffic must be routed toward across the underlying IP network. The first option correctly supplies both required values in a single, complete statement -- source 192.168.1.1 (Router A's own address) and destination 192.168.2.1 (Router B's address) -- fully defining the tunnel's endpoints and ensuring the encapsulation and route-resolution process can succeed. The fourth option supplies only the destination and omits the source entirely, which is an incomplete configuration; without an explicit source, Junos cannot always reliably determine which local address to use for encapsulation, particularly on multi-address or multi-interface routers, and the tunnel configuration is left non-deterministic or non-functional as shown. The second option enables the IPv6 protocol family on the tunnel's logical unit, which is irrelevant to a scenario explicitly requiring IPv4 passenger traffic support. The third option attempts to assign a family inet address directly using one of the underlying tunnel endpoint addresses, which conflates the tunnel's own transport addressing with logical-unit protocol addressing and does not by itself establish the required source/destination tunnel definition.
NEW QUESTION # 155
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