SISL Infotech Interview Questions and Answers

VLAN stands for Virtual Local Area Network. It is a method of segmenting a physical network into multiple virtual networks.

• VLANs are created by configuring network switches to assign specific ports to a particular VLAN.

• Each VLAN operates as a separate network, allowing for better network management and security.

• VLANs can be created based on different criteria such as department, function, or location.

• For example, a com...read more

DHCP is a network protocol that assigns IP addresses to devices. DHCP option 42 is the NTP server option, while DHCP option 40 is the NIS domain option.

• DHCP is a protocol used to automatically assign IP addresses to devices on a network.

• DHCP option 42 is used to specify the Network Time Protocol (NTP) server that the client should use.

• DHCP option 40 is used to specify the Network Information Service (NIS) domain that t...read more

Radius protocol is used for authentication, authorization, and accounting in network communication.

• Radius protocol is used to authenticate users before granting access to a network.

• It also authorizes users based on their credentials and permissions.

• Radius protocol provides accounting functionality to track and monitor user activity on the network.

• It is commonly used in enterprise networks, VPNs, and wireless networks.

• E...read more

I have experience in configuring routers and switches, including different types of switches. In my previous project, I used devices such as Cisco routers and switches.

• Configured routers and switches in previous projects

• Familiar with different types of switches

• Used devices like Cisco routers and switches

I was a Network Engineer responsible for designing, implementing, and maintaining network infrastructure.

• Designed and implemented network infrastructure to support company operations

• Maintained network security by implementing firewalls and monitoring systems

• Troubleshooted network issues and provided technical support to end users

• Collaborated with cross-functional teams to ensure network reliability and performance

• Left ...read more

LVM (Logical Volume Manager) is a tool used to manage disk space by creating logical volumes from physical volumes.

• LVM allows for dynamic resizing of logical volumes without the need to unmount the filesystem

• To extend a logical volume, use the 'lvextend' command followed by the size to extend by and the logical volume name

• For example, to extend a logical volume named 'lv_data' by 100MB, the command would be 'lvextend -...read more

SIEM integration refers to the process of connecting a Security Information and Event Management system with other security tools and systems.

• SIEM integration allows for centralized monitoring and analysis of security events across an organization.

• It enables correlation of data from various sources to detect and respond to security incidents more effectively.

• Examples of SIEM integration include connecting SIEM with fir...read more

rpm is a package manager for Red Hat-based systems, while yum is a high-level package manager that uses rpm as its backend.

• rpm is a low-level package manager that directly interacts with the system's package database and files

• yum is a high-level package manager that automates the process of dependency resolution and package installation

• yum can also automatically download and install dependencies for a package, while rp...read more

Reactjs components include class components, functional components, and higher-order components.

• Class components are ES6 classes that extend React.Component and have a render method.

• Functional components are simple functions that take props as input and return JSX.

• Higher-order components are functions that take a component as input and return a new component with additional functionality.

• Examples: Class component - cla...read more