Network Engineer

Q1. What is the difference between iBGP and eBGP? Ans: iBGP runs between Routers in the same AS, while eBGP runs between Routers in different ASes.

Q2. What are the various states in BGP?

Ans: Idle - Connect - Active - OpenSent - OpenConfirm - Established

Q. BGP Path attribute Inbound and Outbound direction traffic manipulation (ebgp neighborship traffic manipulstion 3 ways )

Q3. What are the various states in OSPF?

Ans: Down Init or Attempt - Two-Way - ExStart - Exchange - Loading Full

Q4. What is full form of DR/BDR, NSSA?

Ans: DR = Designated Router BDR = Backup Designated Router NSSA = Not-So-Stubby Area

Q5. What is the AD value of iBGP, eBGP, OSPF?

Ans: iBGP AD = 200 eBGP AD = 20 OSPF AD = 110, * Provide on-site technical support for network equipment, Servers, and related infrastructure in data centers and office environments.

• Design, implement, and support enterprise LAN, WAN, and DC networks
• Ensure high availability, performance, and security of network infrastructure
• Perform physical tasks such as cabling, racking, stacking, and replacing hardware components.
• Assist in network troubleshooting, including connectivity issues, hardware failures, and configuration support under remote guidance.
• Execute smart hands activities, including power cycling, patching, and device resets as per instructions from NOC or engineering teams.
• Maintain accurate documentation of activities, incidents, and changes performed on-site.
• Coordinate with remote network operations teams to resolve escalated issues promptly.
• Ensure compliance with customer security and operational standards during all activities.

• L1/L2 experience in network operations and support or data center environments.
• Strong understanding of networks infrastructure (TCP/IP, routing, switching and dynamic routing protocols).
• Hands-on experience with network hardware (Routers, Switches, Firewalls) and cabling standards.
• Ability to work independently and follow detailed technical instructions from remote teams.
• Ability to work independently on the deployments and transformations.
• Familiarity with ticketing systems like ServiceNow and ITIL processes is a plus.
• Excellent communication and coordination skills.

Preferred Certifications:

• CCNA, CCNP and administrator level certification on other OEMs or equivalent networking certification.
• Data Center or hardware vendor certifications (eg, Dell, Cisco, HP) are an advantage.

Ans: STP keeps the network stable by removing loops while still allowing backup paths for failover.

Q8. Why HSRP is used?

Ans: HSRP provides gateway redundancy by allowing multiple Routers to act as one virtual default gateway.

Q9: Give example of link-state protocol, and path-vector protocol.

Ans: OSPF is a link-state protocol, and BGP is a path-vector protocol.