Network security - ip, subnet, protocol

• IP Addresses & Subnets: Every device on a network has a unique IP address, and subnets divide networks into smaller segments.
• Protocols: Protocols like TCP/IP are the rules that govern data transmission across networks. HTTP is used for web traffic, FTP for file transfers, and DNS for domain resolution.

IP addressing, subnets, and protocols

IP ADDRESSING & SUBNETS

SUBNETS

A subnet, or subnetwork, is a network inside a network. A subnet divides a larger network into smaller, manageable sections, improving network performance and security by limiting broadcast traffic and isolating devices.

ip aDDRESSING

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An IPv4 address is a 32-bit number. It uniquely identifies a host (computer or other device, such as a printer or router) on a network. IP addresses are normally expressed in dotted-decimal format, with four numbers separated by periods, such as 192.168. 123.132.

FTP

File Transfer Protocol (FTP): Allows file sharing between servers by establishing two TCP connections, one for data transfer and the other for control. The data transfer connection transfers the actual files while the control connection transfers control information such as passwords to ensure data retrieval in case of data loss.

IP

Internet Protocol (IP): Facilitates routing the data packets across networks. IP contains addressing and control information to deliver packets across a network. It works along with TCP. While it ensures delivering the packets to the right address, TCP aligns them in the right order.

UDP

User Datagram Protocol (UDP): Unlike TCP, UDP is a connectionless protocol that doesn’t ensure a connection between the application and server before transmitting a message. It’s effective for use cases such as broadcasts or multicast connections.

Transmission Control Protocol (TCP): A reliable, connection-oriented protocol that helps in the sequential transmission of data packets to ensure data reaches the destination on time without duplication.

TCP

network Protocols

HTTP

Hyper-Text Transfer Protocol (HTTP): Commonly referred to as the protocol of the internet that allows communication between a server and browser.

Watch this video to learn about subnet masks

Watch this video to learn about ip addresses.