Cognizant Trainee Network Engineer Interview Questions, Process, and Tips for Experienced

Q1. Explain about VLAN and how it works?
Ans. 
VLAN is a virtual LAN that separates network traffic based on logical grouping, improving network security and performance.
• VLANs divide a physical network into multiple logical networks, allowing for better traffic management.

• Devices within the same VLAN can communicate directly with each other, while devices in different VLANs require a router to communicate.

• VLANs can be configured based on port, MAC address, or proto...read more
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Q2. Do you know about ospf
Ans. 
OSPF (Open Shortest Path First) is a routing protocol used to find the best path for data packets in a network.
• OSPF is a link-state routing protocol

• It uses Dijkstra's algorithm to calculate the shortest path

• OSPF routers exchange link-state advertisements (LSAs) to build a topology map of the network

• It supports VLSM (Variable Length Subnet Masking) and CIDR (Classless Inter-Domain Routing)

• OSPF uses cost as a metric to d
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Q1. How arp generate and its packet flow across the network?
Ans. 
ARP generates and sends packets to map IP addresses to MAC addresses in a network.
• ARP request is broadcasted to all devices on the network

• The device with the matching IP address responds with its MAC address

• ARP table is updated with the IP-MAC mapping

• ARP packets have source and destination MAC addresses, IP addresses, and ARP operation code
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Q2. What is CSMA/CD, and how does this thing work in real life, give an example.
Ans. 
CSMA/CD stands for Carrier Sense Multiple Access with Collision Detection. It is a network protocol used in Ethernet networks to avoid data collisions.
• CSMA/CD is used in Ethernet networks to regulate access to the network medium.

• Before sending data, a device using CSMA/CD listens to the network to check if it is busy.

• If the network is clear, the device sends the data. If a collision is detected, the device stops transm...read more
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Q1. Question related to retention
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Q2. Question related to aspirations
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Regarding technical questions

Q1. Asking for IP and networking
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Q2. What is the VPN
Ans. 
VPN stands for Virtual Private Network. It is a secure and encrypted connection between two devices over the internet.
• VPN allows remote access to a private network over the internet

• It provides security and privacy by encrypting the data transmitted over the network

• VPN can be used to bypass geographical restrictions and access content not available in your region

• Examples of VPN include OpenVPN, Cisco AnyConnect, and Nor
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Q3. What is the server name
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The server name is not specified. Can you please provide more context?
• The question needs more information to provide a specific answer.

• The server name could refer to a specific server in a network or a domain name.

• Without additional context, it is impossible to provide a meaningful answer.
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Q4. Asking for priorities
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Q1. Asking for salary
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Technical support business analyst And IT data analysis related riport explain And handle all different. Related as all queries solved And employees to employees relationship And mentioned stuff strictly And strong.

Q1. IT. i am basically current studied MIT campus PGDM IT HR anyletics related study .i am eligible for company work?
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Q2. I larning And devopment IT consultant helf And support company growth. i interested . this opportunity nice i am eligible to this yes ya no.
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General mathematics calculation are in appititude test

Q1. Networking related questions test
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Last 2 round test selected students are talking one topic in rounded table. This is GD round

Q1. HR discuss about the salary details and work locations
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The interview was very good as they asked me my experiences(good & bad) from the day I am professional. How to handle the situations when a senior person makes a mistake. What are the ways of learning that you prefer.

Q1. Which tools have I worked for.
Ans. 
I have worked with a variety of tools as a Network Engineer.
• Cisco Packet Tracer

• Wireshark

• SolarWinds Network Performance Monitor

• Nmap

• GNS3

• Ping

• Traceroute
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Q2. Which technologies I've worked on.
Ans. 
I have worked on a variety of technologies as a Network Engineer.
• Cisco networking equipment

• Routing and switching protocols (e.g. OSPF, BGP)

• Firewalls and security appliances (e.g. Cisco ASA, Palo Alto)

• Network monitoring and management tools (e.g. SolarWinds, Wireshark)

• Virtualization technologies (e.g. VMware, Hyper-V)

• Load balancers (e.g. F5, Citrix NetScaler)

• Wireless networking (e.g. Cisco Meraki, Aruba)

• Network troubles
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Q3. Brief questions on all technologies and technical terms.
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Q1. No questions. Only HR discussions.
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