20+ Tech Mahindra Interview Questions and Answers

WAN is a network that covers a large geographical area while LAN is a network that covers a small area.

• WAN stands for Wide Area Network while LAN stands for Local Area Network

• WAN covers a large geographical area such as a city, country or even the world while LAN covers a small area such as a building or a campus

• WAN is usually slower and more expensive than LAN

• Examples of WAN include the internet while examples of LAN include home or office networks

Private IP is used within a network while public IP is used to communicate over the internet.

• Private IP is assigned to devices within a local network and is not visible to the internet.

• Public IP is assigned by the internet service provider and is used to communicate over the internet.

• Private IP addresses are in the range of 10.0.0.0 to 192.168.0.0.

• Public IP addresses are unique and can be traced back to a specific device or location.

• Private IP addresses are used for internal ...read more

Modem connects to the internet, router connects devices to the network, switch connects devices to each other.

• Modem converts digital signals to analog for transmission over phone lines or cable lines.

• Router directs traffic between devices on a network and connects to the internet through a modem.

• Switch connects devices to each other within a network.

• Example: Modem - cable modem, Router - Linksys router, Switch - Netgear switch

TCP/IP is a set of protocols used for communication over the internet. OSI layer is a model for network communication.

• TCP/IP is a suite of communication protocols used for transmitting data over the internet.

• It consists of two main protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP).

• TCP ensures reliable transmission of data while IP is responsible for routing packets to their destination.

• OSI layer is a conceptual model for network communication that defi...read more

A network is a group of interconnected devices that can communicate and share resources.

• A network can be wired or wireless

• Devices on a network can share files, printers, and internet access

• Networks can be local (LAN) or wide area (WAN)

• Examples of networks include the internet, home networks, and corporate networks

Accessing google.com involves DNS resolution, TCP handshake, HTTP request, and response at the packet level.

• 1. DNS resolution to translate domain name to IP address

• 2. TCP handshake to establish connection

• 3. HTTP request sent to the server

• 4. Server processes the request and sends back HTTP response

• 5. Data packets are exchanged between client and server

Research online forums, reach out to colleagues, test different solutions, document findings.

• Search online forums and communities for similar issues and solutions.

• Reach out to colleagues or other experts in the field for advice.

• Test different solutions and document the results to track progress.

• Keep detailed notes of the troubleshooting process for future reference.

• Consider reaching out to the vendor or manufacturer for support.

• Experiment with different troubleshooting techni...read more

DHCP stands for Dynamic Host Configuration Protocol. It is a network management protocol used to assign IP addresses to devices on a network.

• DHCP automatically assigns IP addresses to devices on a network

• There are two types of DHCP: DHCP server and DHCP client

• DHCP server assigns IP addresses to devices, while DHCP client requests and receives IP addresses

Understanding of OSI Layers, MAC vs IP, ARP types, SSL handshake, and TCP handshake.

• OSI Layers: 7 layers that define networking functions

• MAC vs IP: MAC address is hardware address, IP address is logical address

• ARP types: ARP, RARP, Inverse ARP

• SSL handshake: Process of establishing secure connection

• TCP handshake: 3-way process to establish connection

DHS stands for Department of Homeland Security and DHCP stands for Dynamic Host Configuration Protocol.

• DHS is a government agency responsible for ensuring the security of the United States.

• DHCP is a network protocol that dynamically assigns IP addresses to devices on a network.

• DHS plays a crucial role in protecting the country from various threats, including terrorism and cybersecurity.

• DHCP simplifies network administration by automatically assigning IP addresses to devices, ...read more

To install a router, connect it to a power source, connect it to a modem, configure the settings, and connect devices to the network.

• Connect the router to a power source using the provided power adapter.

• Connect the router to a modem using an Ethernet cable.

• Access the router's settings through a web browser by entering the default IP address (e.g. 192.168.1.1).

• Follow the on-screen instructions to set up the network name (SSID) and password.

• Connect devices to the network by ent...read more

Firewall is a network security system that monitors and controls incoming and outgoing network traffic. VPN is a secure connection over a public network. TCP/IP is a set of protocols governing the internet.

• Firewall is a network security system that monitors and controls incoming and outgoing network traffic

• VPN is a secure connection over a public network, allowing users to securely access a private network

• TCP/IP is a set of protocols governing the internet, including how data...read more

An IP address can be found by checking network settings on a device or using online tools.

• Check network settings on device (e.g. Windows: Control Panel > Network and Sharing Center > Change adapter settings)

• Use online tools like ipchicken.com or whatismyip.com

• Command prompt: type 'ipconfig' (Windows) or 'ifconfig' (Mac/Linux)

I expect a competitive salary based on my experience and skills.

• I am looking for a salary that reflects my technical expertise and industry standards.

• I am open to negotiation based on the responsibilities and benefits offered.

• I am looking for a total compensation package that includes salary, bonuses, and benefits.

• I am interested in opportunities for career growth and advancement within the company.

TCP is connection-oriented, reliable, and slower, while UDP is connectionless, unreliable, and faster.

• TCP is connection-oriented, meaning it establishes a connection before sending data, while UDP is connectionless.

• TCP is reliable as it ensures all data packets are received in order and without errors, while UDP does not guarantee delivery.

• TCP is slower due to the overhead of error-checking and retransmission, while UDP is faster as it has less overhead.

• Examples: TCP is used ...read more

IPSec is a protocol suite used for secure communication over IP networks.

• IPSec operates in two modes: Transport mode and Tunnel mode.

• In Transport mode, only the payload of the IP packet is encrypted and/or authenticated.

• In Tunnel mode, the entire IP packet is encrypted and/or authenticated.

• IPSec uses security protocols like Authentication Header (AH) and Encapsulating Security Payload (ESP) to provide data integrity, authentication, and confidentiality.

• IPSec can be implemente...read more

DHCP stands for Dynamic Host Configuration Protocol, which is a network management protocol used to assign IP addresses automatically to devices on a network.

• DHCP eliminates the need for manual IP address configuration on each device

• It dynamically assigns IP addresses to devices when they connect to the network

• DHCP servers lease IP addresses to devices for a specific period of time

• DHCP also provides other network configuration information such as subnet mask, default gateway,...read more

DNS stands for Domain Name System, which translates domain names to IP addresses.

• DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).

• DNS servers store DNS records, which contain information about domain names and their corresponding IP addresses.

• DNS operates through a hierarchical system, with different levels of DNS servers responsible for different tasks such as resolving domain names and ...read more

OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• Each layer has specific functions and communicates with adjacent layers

• Example: HTTP operates at the Application layer, while TCP operates at the Transport layer