10+ Enterprise Support Engineer Interview Questions and Answers

OSI (Open Systems Interconnection) layer is a conceptual model that describes the communication functions of a telecommunication system.

• Layer 1 (Physical Layer) - Transmits raw data bits over a communication channel.

• Layer 2 (Data Link Layer) - Provides error-free transfer of data frames between nodes over the physical layer.

• Layer 3 (Network Layer) - Provides logical addressing and routing of data packets between nodes on different networks.

• Layer 4 (Transport Layer) - Provides...read more

L2 is data link layer responsible for MAC addressing and error detection, while L3 is network layer responsible for IP addressing and routing.

• L2 operates on MAC addresses while L3 operates on IP addresses

• L2 is responsible for error detection and correction while L3 is responsible for routing

• L2 switches packets within a network while L3 routes packets between networks

• Examples of L2 devices include switches and bridges while examples of L3 devices include routers and layer 3 sw...read more

Encapsulation, Inheritance, Polymorphism, Abstraction

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Inheritance: Ability of a class to inherit properties and behavior from another class

• Polymorphism: Ability to present the same interface for different data types

• Abstraction: Hiding the complex implementation details and showing only the necessary features

TCP is connection-oriented, while UDP is connectionless.

• TCP establishes a connection before sending data, ensuring reliable delivery.

• UDP does not establish a connection and does not guarantee delivery.

• TCP is used for applications like web browsing, email, and file transfer.

• UDP is used for real-time applications like video streaming and online gaming.

VLAN stands for Virtual Local Area Network. It is a logical grouping of devices on a network based on their function, project, or application.

• VLANs allow network administrators to segment a network into smaller, more manageable groups.

• Each VLAN has its own broadcast domain, which means that broadcasts are contained within the VLAN and do not spread to other VLANs.

• VLANs can be configured to span multiple switches, allowing devices in different physical locations to be grouped ...read more

HTTPS is a secure protocol for transferring data over the internet, while FTP is a protocol for transferring files between a client and a server.

• HTTPS stands for Hypertext Transfer Protocol Secure

• It encrypts data to ensure secure communication between a client and a server

• Commonly used for secure online transactions, such as online banking or shopping

• FTP stands for File Transfer Protocol

• It allows for the transfer of files between a client and a server

• Often used for uploading ...read more

A router is a networking device that forwards data packets between computer networks.

• Routers operate at the network layer of the OSI model.

• They use routing tables to determine the best path for data to travel.

• Routers can connect different types of networks, such as LANs and WANs.

• Examples of routers include Cisco, Juniper, and TP-Link.

• Routers can provide security features such as firewalls and VPNs.

Subnetting is the process of dividing a network into smaller subnetworks.

• Subnetting helps in efficient utilization of IP addresses.

• It improves network performance and security.

• Subnetting is done by borrowing bits from the host portion of an IP address.

• CIDR notation is used to represent subnet masks.

• Example: 192.168.1.0/24 represents a network with 256 IP addresses.

Heap memory is a region of a computer's memory that is used for dynamic memory allocation.

• Heap memory is allocated at runtime and can be accessed randomly.

• It is used for storing objects and data structures that need to be dynamically allocated and deallocated.

• Heap memory is managed by the programmer and not automatically by the system.

• Examples of heap memory usage include creating objects in Java using the 'new' keyword or allocating memory using malloc() in C.

The 7 layers of networking refer to the OSI model, which is a conceptual framework used to understand how networks operate.

• Physical Layer: Deals with physical connections and hardware (e.g. cables, switches)

• Data Link Layer: Manages data transfer between devices on the same network (e.g. MAC addresses)

• Network Layer: Handles routing and forwarding of data packets (e.g. IP addresses)

• Transport Layer: Ensures reliable data transfer between end systems (e.g. TCP)

• Session Layer: Mana...read more