Nexpro Systems L2 Support System Administrator Interview Questions and Answers

OSI model is a conceptual model that describes how data is transmitted over a network.

• 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 adjacent layers.

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

• The model helps in troubleshoot...read more

OSI and TCP/IP models are both used to describe how data is transmitted over a network.

• OSI has 7 layers while TCP/IP has 4 layers

• OSI is a theoretical model while TCP/IP is a practical model

• OSI is a top-down approach while TCP/IP is a bottom-up approach

• OSI is more complex and comprehensive than TCP/IP

• TCP/IP is the most widely used model in practice

DNS stands for Domain Name System. It is a system that translates domain names into IP addresses.

• DNS is like a phonebook for the internet

• It maps domain names to IP addresses

• DNS servers store this information and respond to requests for domain name resolution

• DNS uses a hierarchical structure with top-level domains like .com, .org, .net, etc.

• DNS resolution can be recursive or iterative

• DNS caching helps to speed up the re...read more

Networks refer to the interconnection of devices and systems to facilitate communication and data exchange.

• Networks allow devices to communicate and share resources

• They can be wired or wireless

• Examples include LAN, WAN, and the internet

• Networks can be secured using firewalls and other security measures

Active Directory is a Microsoft service that manages network resources and user accounts.

• It provides centralized authentication and authorization for Windows-based computers.

• It allows administrators to manage users, computers, and other network resources from a single location.

• It uses a hierarchical structure of domains, trees, and forests to organize network resources.

• It supports group policies, which allow administra...read more

Group Policy is a feature in Windows that allows administrators to manage user and computer settings centrally.

• Group Policy is used to enforce security policies, software installation policies, and other settings across a network.

• It can be used to restrict access to certain features or applications, set password policies, and configure network settings.

• Group Policy settings are stored in Group Policy Objects (GPOs) whi...read more

Ticketing is a process of logging, tracking, and resolving customer issues or requests.

• Ticketing systems are used to manage customer support requests.

• Each request is assigned a unique ticket number for tracking purposes.

• Tickets can be prioritized based on severity and assigned to appropriate teams or individuals.

• Ticketing systems allow for communication between customers and support teams.

• Examples of ticketing systems ...read more

Tickets priority can be categorized based on impact and urgency.

• Impact refers to the extent of damage or disruption caused by the issue.

• Urgency refers to the time frame within which the issue needs to be resolved.

• Priority levels can be high, medium, or low based on the combination of impact and urgency.

• For example, a critical system outage would have high impact and high urgency, while a minor bug would have low impact...read more

SLA stands for Service Level Agreement and TAT stands for Turnaround Time.

• SLA is a contract between a service provider and a customer that outlines the level of service expected.

• TAT is the amount of time it takes to complete a task or resolve an issue.

• Both SLA and TAT are important metrics in measuring the quality of service provided.

• For example, an SLA may guarantee a response time of 24 hours and a TAT of 48 hours fo...read more