CtrlS Network Security Engineer Interview Questions and Answers

A Security Engineer is responsible for protecting an organization's computer systems and networks from cyber threats.

• Designing and implementing security measures to protect computer systems and networks

• Monitoring for security breaches and investigating violations

• Installing security software and regularly updating systems

• Conducting security assessments and audits

• Responding to security incidents and providing incident re

Router and switch configuration

• Router configuration involves setting up IP addresses, routing protocols, and security features

• Switch configuration involves VLANs, port settings, and link aggregation

• Both require knowledge of command line interfaces and network topologies

• Examples include configuring OSPF on a router and setting up a trunk port on a switch

A protocol is a set of rules that governs the communication between devices in a network. There are several types of protocols.

• A protocol defines the format, timing, sequencing, and error control of data transmission.

• Protocols can be categorized into network protocols, transport protocols, and application protocols.

• Examples of network protocols include IP (Internet Protocol), ICMP (Internet Control Message Protocol), a...read more

AD stands for Active Directory, which is a directory service used in Windows environments. Range refers to a specific set of values or a span of numbers.

• AD is a centralized database that stores information about network resources, such as users, computers, and groups.

• It provides authentication and authorization services, allowing users to access resources based on their permissions.

• AD uses a hierarchical structure with...read more

The OSI Model is a conceptual framework that standardizes the functions of a communication system into seven layers.

• The OSI Model stands for Open Systems Interconnection Model.

• It was developed by the International Organization for Standardization (ISO) in 1984.

• The model helps in understanding how different network protocols and technologies interact.

• It divides the network communication process into seven layers, each w...read more

The layers that call to the heart of OSI are the Transport layer and the Application layer.

• The Transport layer is responsible for the end-to-end delivery of data and ensures reliable communication between hosts.

• The Application layer provides services directly to the end-user and includes protocols like HTTP, FTP, SMTP, etc.

• These layers interact with the heart of the OSI model, which is the core of the network architect...read more

The protocol with the lowest AD value is OSPF (Open Shortest Path First).

• AD (Administrative Distance) is a value used by routers to determine the best path for forwarding packets.

• Lower AD value indicates a more preferred route.

• OSPF has an AD value of 110, which is lower than other routing protocols like RIP (120) and EIGRP (90).

Protocols that work with Application layers include HTTP, FTP, SMTP, DNS, and SNMP.

• HTTP (Hypertext Transfer Protocol) is used for web browsing and communication between web servers and clients.

• FTP (File Transfer Protocol) is used for transferring files between a client and a server.

• SMTP (Simple Mail Transfer Protocol) is used for sending and receiving email messages.

• DNS (Domain Name System) is used for translating doma...read more