2nd-Line Special
What is the purpose of a firewall?
To protect a network by controlling incoming and outgoing traffic.
What is a SQL injection attack?
SQL injection is a type of security exploit where an attacker inserts malicious SQL code into a query, manipulating or gaining unauthorized access to a database.
What does a MAC address represent?
A MAC (Media Access Control) address is a unique identifier assigned to a network interface card, enabling communication within a network.
Which command is used to list files in a directory?
ls (in Unix/Linux) like dir (in Windows)
What is the difference between Azure Virtual Machines and Azure App Service?
Azure Virtual Machines provide infrastructure for running applications, while Azure App Service is a platform for hosting web applications without worrying about the underlying infrastructure.
What is the difference between TCP and UDP protocols?
TCP (Transmission Control Protocol) provides reliable, connection-oriented communication, while UDP (User Datagram Protocol) offers fast, connectionless communication.
What is the difference between symmetric and asymmetric encryption?
Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption uses different keys for each operation.
What is the difference between a switch and a router?
A switch connects devices within a network by forwarding data based on MAC addresses, while a router connects multiple networks and forwards data based on IP addresses.
What does the command "grep" do?
It searches for specific patterns in files or output.
What are the three main categories of Azure services?
The three main categories of Azure services are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
What is a VPN (Virtual Private Network)?
A VPN is a secure, encrypted connection between a user's device and a private network, allowing remote access and enhancing privacy and security.
What is the concept of zero trust in cybersecurity?
Zero trust is an approach to security where no user or device is trusted by default, and access to resources is granted based on continuous authentication, authorization, and verification.
What is the purpose of NAT (Network Address Translation)?
It allows multiple devices on a private network to share a single public IP address for internet access or between different local subnets.
Which command is used to change permissions of a file in Unix/Linux?
chmod.
What is the primary storage option in Azure for virtual machines?
The primary storage option for virtual machines in Azure is Azure Managed Disks.
What is the role of a Domain Controller in an Active Directory environment?
A Domain Controller is a server that authenticates users, enforces security policies, and manages access to network resources in an Active Directory domain.
What is a buffer overflow vulnerability?
Buffer overflow is a software vulnerability where a program writes more data to a buffer than it can hold, potentially leading to arbitrary code execution or system crashes.
What is the Content Delivery Network (CDN)?
CDN is a geographically distributed network of servers that delivers web content to users more efficiently by reducing latency and increasing availability.
What is the structure of the crontab syntax in Unix/Linux?
0 5,17 * * * /scripts/script.sh
<Minute> <Hour> <Day_of_the_Month> <Month_of_the_Year> <Day_of_the_Week> <command>
What is Azure Functions Premium plan, and how does it differ from the Consumption plan?
Azure Functions Premium plan provides enhanced performance, longer execution duration, and additional scaling options compared to the Consumption plan.
What is the purpose of SSL/TLS encryption?
SSL (Secure Sockets Layer) and its successor TLS (Transport Layer Security) provide secure communication over the internet, encrypting data between a client and server.
What is the concept of "defense in depth" in IT security?
Defense in depth is an approach that uses multiple layers of security controls to protect against various threats, reducing the reliance on any single security measure.
What is the purpose of Quality of Service (QoS) in networking?
QoS is used to prioritize and manage network traffic, ensuring that certain types of data (e.g., video or voice) receive higher priority for smoother transmission.
How do you set up a static IP address and DHCP in Linux?
The configuration file "/etc/network/interfaces" is used to set up a static IP address.
The "dhcpd" service and the "/etc/dhcpd.conf" configuration file are used to configure a Linux server as a DHCP server.
Explain the concept of Azure Virtual Networks and how they enable secure communication between Azure resources.
Azure Virtual Networks allow you to create isolated and secure network environments in Azure. They provide the foundation for connecting and enabling communication between Azure resources, virtual machines, and on-premises networks.