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| Section | Weight | Objectives |
|---|---|---|
| Protocol-Independent Routing | 15% | - Routing table and routing instances - Static routes - Routing policy and firewall filters - Load balancing and route preference |
| Data Center Routing Protocols | 20% | - OSPF protocol operation and configuration - BGP protocol fundamentals - Routing in EVPN-VXLAN environments - Route redistribution |
| Data Center Architectures | 20% | - Layer 2 vs Layer 3 deployment models - Traditional multi-tier architectures - EVPN-VXLAN fundamentals - IP fabric architectures (spine-leaf) - Overlay and underlay networks |
| Security, Automation and Management | 15% | - Management and monitoring tools - Data center security basics - Junos automation fundamentals |
| High Availability | 10% | - Virtual Chassis and MC-LAG - Graceful restart and non-stop routing - Redundancy concepts |
| Layer 2 Switching and VLANs | 20% | - Spanning Tree Protocol (STP) and variants - Layer 2 security features - Link aggregation (LACP) - VLAN configuration and operation - Ethernet switching concepts |
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NEW QUESTION # 139
Which of the following are true about Layer 2 and Layer 3 strategies in data center architectures? (Choose two)
Answer: A,C
NEW QUESTION # 140
MACsec provides protection against which two types of threats? (Choose two.)
Answer: A,D
Explanation:
MACsec (Media Access Control Security) provides data confidentiality, integrity, and origin authenticity at Layer 2, protecting against several types of threats.
Step-by-Step Breakdown:
Man-in-the-Middle Attack Protection:
MACsec encrypts traffic at Layer 2, preventing man-in-the-middle attacks where an attacker intercepts and manipulates traffic between two communicating devices. Since the data is encrypted, any intercepted packets are unreadable.
Protection Against Playback Attacks:
MACsec also protects against playback attacks by using sequence numbers and timestamps to ensure that old, replayed packets are not accepted by the receiver. Juniper Reference: MACsec Configuration: Juniper devices support MACsec for securing Layer 2 communications, ensuring protection against replay and man-in-the-middle attacks in sensitive environments.
NEW QUESTION # 141
Referring to the exhibit, how many stages are in this IP fabric?
Answer: B
NEW QUESTION # 142
When a MAC limiting violation occurs, the switch performs which two actions by default? (Choose two.)
Answer: B,D
Explanation:
When a MAC limiting violation occurs on a Juniper switch, the switch will perform the following actions by default:
Step-by-Step Breakdown:
Port Disabled:
When the number of MAC addresses on an interface exceeds the configured limit, the port is automatically disabled to prevent further violations. This is a protective mechanism to prevent MAC address flooding.
Packet Dropped:
Additionally, packets from the violating MAC address are dropped to prevent any further communication from that address. This ensures that only valid MAC addresses are allowed to communicate through the interface.
Example Configuration:
set ethernet-switching-options secure-access-port interface <interface-name> mac-limit 5 If more than five MAC addresses are learned, the port is disabled, and excess packets are dropped.
Juniper Reference:
MAC Limiting: When the switch detects a MAC limiting violation, it disables the port and drops further packets from the violating MAC addresses to maintain network security.
NEW QUESTION # 143
In the Junos OS, what is the default behavior of a switch when it receives a frame with an unknown destination MAC address?
Answer: A
NEW QUESTION # 144
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