TCS Network Engineer Interview Questions and Answers

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Technically questions

Q1. Basic questions
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Q2. Basic questions 2
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Q1. Payroll and ctc
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Q2. Benefits and advantages
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Benefits and advantages of being a Network Engineer include high demand, competitive salary, opportunities for growth, and job security.
• High demand for network engineers in various industries

• Competitive salary compared to other IT roles

• Opportunities for growth and advancement in the field

• Job security due to the increasing reliance on technology and networks

• Ability to work on cutting-edge technologies and projects
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Q1. Tell about SD-WAN architechture
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SD-WAN architecture is a software-defined approach to managing wide area networks.
• SD-WAN uses software to control the connectivity, management, and services between data centers and remote branches.

• It allows for centralized control and automation of network traffic.

• SD-WAN can prioritize critical applications and optimize bandwidth usage.

• Examples of SD-WAN vendors include Cisco, VMware, and Silver Peak.
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Q2. Explain STP selection process
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STP selection process determines the root bridge and designated ports in a network.
• STP selection process starts by electing a root bridge based on the lowest bridge ID.

• Each switch then determines the best path to the root bridge.

• Designated ports are selected on each segment based on the lowest path cost to the root bridge.

• Non-designated ports are put in blocking state to prevent loops in the network.
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Q3. How BR & DBR elected
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Q4. OSPF LSA types & uses
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OSPF LSA types include Router LSA, Network LSA, Summary LSA, and ASBR Summary LSA, each serving different purposes in OSPF routing.
• Router LSA: Describes the router's directly connected links.

• Network LSA: Represents multi-access networks and lists all routers connected to the network.

• Summary LSA: Summarizes routes from one area to another.

• ASBR Summary LSA: Summarizes external routes injected into OSPF by an ASBR.

• LSA typ...read more
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Q5. What are the BGP states
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BGP states refer to the different stages a BGP session goes through during establishment and maintenance.
• Idle state: Initial state when BGP process starts

• Connect state: Attempting to establish a TCP connection

• OpenSent state: Sending an OPEN message to peer

• OpenConfirm state: Waiting for an OPEN message from peer

• Established state: BGP peers are fully synchronized and exchanging routing information
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Q1. What is data link layer and network layer
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Data link layer is responsible for node-to-node communication, while network layer is responsible for end-to-end communication.
• Data link layer operates at Layer 2 of the OSI model and is responsible for framing, error detection, and flow control.

• Network layer operates at Layer 3 of the OSI model and is responsible for logical addressing, routing, and path determination.

• Examples of data link layer protocols include Ethe...read more
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Q2. What is the difference between firewall and router
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Firewall filters traffic based on security rules, while router forwards data packets between networks.
• Firewall is used to block or allow traffic based on security rules, while router is used to forward data packets between networks

• Firewall operates at the network layer (Layer 3) or above, while router operates at the network layer (Layer 3)

• Firewall can inspect and filter traffic based on IP addresses, ports, protocols,...read more
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Q1. What is the LSA types
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Q2. DHCP server ip not pinging , how to troubleshoot
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Q1. How to work in previous company
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Q2. How to wor your Rool and contribution
Ans. 
I work with my team to design, implement, and maintain network infrastructure to ensure optimal performance and security.
• Collaborate with team members to plan and design network infrastructure

• Implement network solutions based on project requirements

• Monitor and troubleshoot network issues to ensure optimal performance

• Contribute to network security by implementing best practices and protocols

• Document network configuratio...read more
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Q1. About tcpip dns osi f5
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Q2. Dns dhcp lan wan
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