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| Section | Weight | Objectives |
|---|---|---|
| BGP | 15-20% | - Route advertisement, attributes and path selection - Neighbor relationships and session establishment - Routing policies, filtering and common troubleshooting |
| Protocol Independent Routing | 10-15% | - Routing instances and route selection criteria - Basic routing policy and filter operation - Routing tables, static routes and route preference |
| IS-IS | 10-15% | - Configuration and route exchange - Adjacency establishment, levels and metrics - Scalable enterprise deployment 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 - Overlay network design and connectivity - Tunnel types, encapsulation and operation |
| OSPF | 15-20% | - Configuration, verification and troubleshooting - Neighbor formation, area design and LSA types - Route summarization and redistribution |
| Layer 2 Switching and VLANs | 15-20% | - Link Aggregation Groups (LAG) and Virtual Chassis - Spanning Tree Protocol (STP, RSTP, MSTP) operation and configuration - VLAN concepts, configuration, trunking and tagging |
| 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 |
| IP Multicast | 5-10% | - PIM Dense Mode, Sparse Mode and RP mechanisms - IGMP operation and configuration - Multicast routing monitoring and troubleshooting |
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NEW QUESTION # 125
You are asked to connect an IP phone and a user computer using the same interface on an EX Series switch. The traffic from the computer does not use a VLAN tag, whereas the traffic from the IP phone uses a VLAN tag.
Which feature enables the interface to receive both types of traffic?
Answer: B
Explanation:
The feature that enables an interface on an EX Series switch to receive both untagged traffic (from the computer) and tagged traffic (from the IP phone) is the voice VLAN. The voice VLAN feature in EX-series switches enables access ports to accept both data (untagged) and voice (tagged) traffic and separate that traffic into different VLANs. This allows the switch to differentiate between voice and data traffic, ensuring that voice traffic can be treated with a higher priority.
NEW QUESTION # 126
Which IS-IS TLV should be used to advertise information about the router's neighbors and link metrics?
Answer: D
Explanation:
TLV 22, the Extended IS Reachability TLV defined in RFC 5305, is the modern and Junos- preferred mechanism for advertising a router's adjacent neighbors together with the metric associated with each link. It carries the seven-octet system ID and pseudonode number of each neighbor along with a 24-bit wide metric field, and supports an extensible set of sub-TLVs used for traffic-engineering data such as interface and neighbor IP addresses, bandwidth, and administrative groups. The original IS Reachability TLV, TLV 2, defined in the base ISO 10589 standard, carries similar neighbor and metric information but is constrained to a 6-bit narrow metric with a maximum value of 63, which is inadequate for expressing meaningful cost differentiation in modern, high-capacity enterprise and service-provider topologies; consequently, Junos deployments are commonly configured for wide-metrics-only, favoring TLV 22 over the legacy TLV 2 whenever traffic-engineering-capable or simply more granular metric representation is desired. TLV 132, the IP Interface Address TLV, only advertises the IPv4 addresses configured on the originating router's interfaces and carries no neighbor- adjacency or metric information.
TLV 129, the Protocols Supported TLV, merely lists which network- layer protocols (such as IPv4 or IPv6) the originating router is capable of routing, and likewise has nothing to do with neighbor reachability or link cost.
NEW QUESTION # 127
You enable persistent MAC learning on your Juniper switch. In this scenario, which statement is correct?
Answer: C
NEW QUESTION # 128
You are using tunnels in your network. It is important that the routes be specific enough to ensure that the tunnels are established. You need to prevent a route that is new to the network from being used. In this scenario, which type of route should be used?
Answer: D
NEW QUESTION # 129
A host connected to interface ge-0/0/3 on your Juniper Networks EX Series Switch cannot reach another device in the same VLAN. The administrator wants to confirm that the switch has learned the MAC address of the host. Which command should be used to accomplish this task?
Answer: D
Explanation:
The show ethernet-switching table command displays the Layer 2 forwarding database (the bridge or MAC table) that an EX Series switch builds dynamically by inspecting the source MAC address of every frame it receives. Each entry records the learned MAC address, the VLAN it was learned on, the type of entry (dynamic, static, or persistent), and the specific interface through which that address was seen, which is precisely the information needed to confirm whether the switch has learned the host connected to ge-0/0/3. If the host's MAC address is absent from the table, that immediately points to a Layer 1/2 issue -- no frames have been received from the host, a cabling or port problem exists, or the interface is administratively down or blocked by spanning tree -- rather than a Layer 3 routing or VLAN membership problem. show interfaces terse only reports administrative and link state along with any assigned protocol family addresses, offering no MAC-learning visibility. show vlans lists VLAN definitions and their member interfaces but does not display learned host addresses. show interfaces extensive provides detailed physical-layer counters and error statistics, useful for diagnosing frame loss or interface errors, but it does not expose the switching table. For intra-VLAN reachability troubleshooting, verifying MAC learning is always the first and most direct Layer 2 checkpoint.
NEW QUESTION # 130
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