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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: OSPF | 15-20% | - Neighbor formation, area design and LSA types - Route summarization and redistribution - Configuration, verification and troubleshooting |
| Topic 2: IP Multicast | 5-10% | - PIM Dense Mode, Sparse Mode and RP mechanisms - IGMP operation and configuration - Multicast routing monitoring and troubleshooting |
| Topic 3: BGP | 15-20% | - Routing policies, filtering and common troubleshooting - Neighbor relationships and session establishment - Route advertisement, attributes and path selection |
| Topic 4: Layer 2 Security | 10-15% | - Port security, MAC limiting and storm control - Layer 2 firewall filters and security features - DHCP snooping, Dynamic ARP Inspection and IP Source Guard |
| Topic 5: High Availability and Resiliency | 5-10% | - Network resiliency design and troubleshooting - Graceful restart and non-stop routing - Redundancy protocols and failover mechanisms |
| Topic 6: IS-IS | 10-15% | - Configuration and route exchange - Adjacency establishment, levels and metrics - Scalable enterprise deployment and troubleshooting |
| Topic 7: Protocol Independent Routing | 10-15% | - Basic routing policy and filter operation - Routing tables, static routes and route preference - Routing instances and route selection criteria |
| Topic 8: Layer 2 Switching and VLANs | 15-20% | - VLAN concepts, configuration, trunking and tagging - Link Aggregation Groups (LAG) and Virtual Chassis - Spanning Tree Protocol (STP, RSTP, MSTP) operation and configuration |
| Topic 9: 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 # 97
Which statement is correct about the storm control feature?
Answer: A
Explanation:
The storm control feature is enabled in the factory-default configuration on EX Series switches.
On EX2200, EX3200, EX3300, EX4200, and EX6200 switches, the factory default configuration enables storm control for broadcast and unknown unicast traffic on all switch interfaces. On EX4300 switches, the factory default configuration enables storm control on all Layer 2 switch interfaces.
NEW QUESTION # 98
Which two statements correctly describe RSTP port roles? (Choose two.)
Answer: A,B
Explanation:
An RSTP topology contains ports that have specific roles:
The root port is responsible for forwarding data to the root bridge.
The alternate port is a standby port for the root port. When a root port goes down, the alternate port becomes the active root port.
The designated port forwards data to the downstream network segment or device.
The backup port is a backup port for the designated port. When a designated port goes down, the backup port becomes the active designated port and starts forwarding data.
NEW QUESTION # 99
Which statement describes how Rapid Spanning Tree Protocol (RSTP) identifies an alternate port?
Answer: C
Explanation:
RSTP, as defined in IEEE 802.1w, introduces explicit, well-defined port roles that go beyond legacy 802.1D STP's simpler root/designated/blocking model, and the alternate port role is one of RSTP's key refinements.
An alternate port is a port that receives BPDUs from a bridge other than the one through which the local switch's actual root port reaches the root bridge - in other words, it represents a second, redundant path toward the root bridge learned from a different upstream bridge than the one currently providing the best (root port) path. Because the existing root port already provides the lowest-cost, actively used path to the root, the alternate port is deliberately held in the discarding (non-forwarding) state during normal, stable operation, functioning purely as a pre-computed, ready-to-use backup; critically, RSTP's major performance advantage over legacy STP is that if the current root port fails, the switch can transition its alternate port directly and almost instantly into the forwarding root port role without needing to pass through the lengthy listening and learning timer-based states that classic STP required, since the alternate port's suitability as a backup was already continuously verified through ongoing BPDU reception. It is not simply 'not receiving BPDUs' (an alternate port receives BPDUs continuously, just inferior ones relative to the current root port), it is not itself the least-cost path (that describes the root port), and it does not forward based on designated-port overload, which is not a concept that exists in RSTP's port-role logic at all. Reference topics: Junos Enterprise Switching - Spanning Tree Protocols, RSTP Port Roles: Alternate and Backup Ports.
NEW QUESTION # 100
You manage the Layer 2 network shown in the exhibit. You experience a failure on the ge-0/0/0 link between Switch-1 and Switch-2.
Which statement is correct about the expected behavior?
Answer: D
NEW QUESTION # 101
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: D
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 # 102
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