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Earning the JNCIA-DC certification can open up many career opportunities for IT professionals. It demonstrates that they have the skills and knowledge required to design, configure, and manage data center networks using Juniper Networks technology. Data Center, Associate (JNCIA-DC) certification is recognized by many organizations around the world, and it can help individuals stand out in a competitive job market. Additionally, the JNCIA-DC certification is a prerequisite for higher-level Juniper Networks certifications, such as the Juniper Networks Certified Specialist Data Center (JNCIS-DC) and Juniper Networks Certified Expert Data Center (JNCIE-DC) certifications.
Juniper JN0-280 Exam covers a wide range of topics related to data center networking, including data center architecture, data center networking protocols and standards, data center switching and routing, and data center security. JN0-280 exam consists of 65 multiple-choice questions and has a time limit of 90 minutes. Candidates must achieve a passing score of 70% or above to obtain the certification.
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NEW QUESTION # 118
What information in the Ethernet header is used to populate the bridging table?
Answer: C
Explanation:
Thesource MAC addressin the Ethernet header is used to populate thebridging table(also called the MAC address table) on a switch. When a frame arrives at a switch, the switch examines the source MAC address and records it along with the ingress port in its MAC address table.
Step-by-Step Breakdown:
* Learning Process:When an Ethernet frame arrives on a switch port, the switch looks at thesource MAC addressand adds this MAC address to the MAC table along with the port it was received on.
This process is calledMAC learning.
* Purpose:The switch uses this information to determine the correct port to send frames destined for that MAC address in future transmissions, thus ensuring efficient Layer 2 forwarding.
Juniper Reference:
* Ethernet Switching: Juniper switches use source MAC addresses to build and maintain the MAC address table, which is essential for Layer 2 switching.
NEW QUESTION # 119
What is the primary difference between IBGP and EBGP?
Answer: C
NEW QUESTION # 120
During a BGP Graceful Restart, what happens to the routes learned from the restarting neighbor?
Answer: D
NEW QUESTION # 121
By default, which two statements are correct about BGP advertisements? (Choose two.)
Answer: C,D
Explanation:
BGP (Border Gateway Protocol)has specific rules for route advertisement between peers.
Step-by-Step Breakdown:
* EBGP to IBGP Route Propagation:
* BGP peers advertise routes learned fromEBGP peerstoIBGP peerswithin the same AS. This ensures that routes learned from external networks are propagated internally within the AS.
* IBGP to EBGP Route Propagation:
* Routes learned fromIBGP peerscan be advertised toEBGP peers, but when advertising these routes, the router uses its own IP address as thenext hop.
* IBGP Split Horizon:
* By default, IBGP peers do not advertise routes learned from one IBGP peer to another IBGP peer. This rule (IBGP split horizon) prevents routing loops within an AS.
Juniper Reference:
* BGP Advertisement Rules: Junos adheres to BGP standards, where IBGP peers do not propagate routes to other IBGP peers, but EBGP peers receive IBGP routes with the advertising router as the next hop.
NEW QUESTION # 122
What is an advantage of using BFD?
Answer: C
NEW QUESTION # 123
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