JRS Global Networks Network Engineer Interview Questions, Process, and Tips

Different types of fiber optic cables include single-mode, multi-mode, and plastic optical fiber.

• Single-mode fiber optic cables have a small core size and are used for long-distance communication.

• Multi-mode fiber optic cables have a larger core size and are used for shorter distances.

• Plastic optical fiber is made of plastic and is often used for short-distance applications like home networks.

• Other types include polariz

DNS is used to translate domain names into IP addresses.

• DNS stands for Domain Name System.

• It helps users access websites by translating human-readable domain names (e.g. www.google.com) into IP addresses (e.g. 172.217.3.206).

• DNS also helps in email delivery by translating domain names into IP addresses to locate mail servers.

• It plays a crucial role in network communication and internet functionality.

Network layer deals with logical addressing and routing of data packets, while data link layer deals with physical addressing and error detection/correction.

• Network layer operates at Layer 3 of OSI model, while data link layer operates at Layer 2.

• Network layer uses logical addressing (IP addresses) for routing packets, while data link layer uses physical addressing (MAC addresses) for local delivery.

• Examples of network...read more

Subnetting is the process of dividing a network into smaller sub-networks to improve performance and security.

• Subnetting helps in optimizing network traffic by breaking down a large network into smaller, more manageable sub-networks.

• It allows for better organization and management of IP addresses within a network.

• Subnetting also enhances network security by creating boundaries between different segments of a network.

• Ex...read more

VLANs (Virtual Local Area Networks) are used to segment a network into multiple isolated networks for security and efficiency.

• VLANs allow for logical segmentation of a network, isolating traffic within each VLAN.

• They can improve network performance by reducing broadcast traffic.

• VLANs can enhance network security by restricting access to resources based on VLAN membership.

• Examples of VLANs include separating voice traff...read more