NetSutra Interview Questions and Answers

OSI model devices are specific to each layer of the model, facilitating communication between devices.

• Layer 1 (Physical): hubs, repeaters, cables

• Layer 2 (Data Link): switches, bridges

• Layer 3 (Network): routers, layer 3 switches

• Layer 4 (Transport): gateways, firewalls

• Layer 5 (Session): not applicable

• Layer 6 (Presentation): encryption/decryption devices

• Layer 7 (Application): servers, workstations

Routers are networking devices that forward data packets between computer networks.

• Routers connect multiple networks together and determine the best path for data to travel.

• They use routing tables to make decisions about where to send data packets.

• Routers can also provide security by blocking unwanted traffic and filtering incoming data.

• Examples of routers include home routers, enterprise routers, and core routers used by internet service providers.

Switches are networking devices that connect devices together and enable communication between them.

• Switches forward data packets between devices on a network

• They use MAC addresses to identify devices and determine where to send data

• Switches can improve network performance by reducing network congestion

• They can also enhance network security by isolating traffic between devices

• Examples of switches include Ethernet switches, LAN switches, and data center switches

Android devices can be protected from data sharing by implementing encryption, using secure connections, and restricting app permissions.

• Implement encryption on the device to protect data from being accessed by unauthorized users

• Use secure connections such as VPNs when transferring sensitive information

• Restrict app permissions to limit the data that apps can access and share

• Regularly update the device's operating system and apps to patch any security vulnerabilities

• Avoid conn...read more

TCP/IP model is a networking protocol that defines how data is transmitted over the internet.

• TCP/IP model has four layers: application, transport, internet, and network access.

• Each layer has its own set of protocols that work together to transmit data.

• TCP/IP model is used for communication between devices on the internet.

• Examples of protocols used in TCP/IP model include HTTP, FTP, TCP, and IP.

Android enrollment methods include NFC, QR code, zero-touch, and manual enrollment.

• NFC (Near Field Communication) - allows users to enroll devices by tapping them against an NFC tag or device

• QR code - users can scan a QR code to quickly enroll their device

• Zero-touch enrollment - devices are automatically enrolled when turned on for the first time

• Manual enrollment - users manually enter their credentials and settings to enroll their device

The OSI model is a conceptual model that describes the communication functions of a telecommunication or computing system.

• OSI stands for Open Systems Interconnection.

• It has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the adjacent layers.

• The model helps in understanding how data is transmitted over a network.

• Example: When you open a website, the Application layer sends a requ...read more