Aujas Cybersecurity-NuSummit company Network Security Engineer Interview Questions and Answers

Nessus security tool provides vulnerability scanning and assessment capabilities for network security.

• Nessus can scan networks for vulnerabilities and provide detailed reports on security issues.

• It can identify misconfigurations, missing patches, and potential security threats.

• Nessus can prioritize vulnerabilities based on severity to help organizations focus on critical issues first.

Privilege in Windows and Linux refers to the level of access and control a user or process has over system resources.

• Privilege levels in Windows are typically categorized as Administrator, Standard User, and Guest.

• In Linux, privilege levels are determined by user accounts and groups, with root being the highest level of privilege.

• Windows uses User Account Control (UAC) to manage privileges and prevent unauthorized chan...read more

Port 443 is used for secure HTTP (HTTPS) communication over the internet.

• Port 443 is the default port for HTTPS traffic, which encrypts data using SSL/TLS protocols.

• It is commonly used for secure communication between web browsers and servers.

• HTTPS ensures that data transmitted over the internet is encrypted and secure.

• Many websites, such as online banking and e-commerce sites, use port 443 to protect sensitive informa...read more

Common network protocols and their associated port numbers for TCP, UDP, FTP, HTTPS, and HTTP.

• TCP (Transmission Control Protocol) is used for reliable communication, typically on port 80 for HTTP.

• UDP (User Datagram Protocol) is used for faster, connectionless communication, often on port 53 for DNS.

• FTP (File Transfer Protocol) operates on TCP port 21 for control and port 20 for data transfer.

• HTTPS (Hypertext Transfer P...read more

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

• Acts as a barrier between a trusted internal network and untrusted external network

• Can be hardware-based or software-based

• Filters traffic based on IP addresses, ports, protocols, and other criteria

• Examples include Cisco ASA, Palo Alto Networks, and pfSense