Networking: DevOps pre-state learning

TCP

Internet Protocol (IP) is the address system of the internet that basically deliver packets of information from source to destination device. Every device has an IP address that uniquely identifies it and enables it to communicate with and exchange data with other devices connected to the internet.

Transmission Control Protocol handles packet ordering or error checking when information deliver information from source to destination device. TCP establishes and maintains a connection between applications or devices until they finish exchanging data.

DNS

Domain Name System (DNS) is the phonebook of the Internet. Humans access information online through domain names. DNS translates domain names to IP addresses so browsers can load Internet resources. It contains the public IP addresses associated with the names of the websites an IP address brings a user to.

HTTP/HTTPS

HTTP stands for Hypertext Transfer Protocol, and it is a protocol – or a prescribed order and syntax for presenting information – used for transferring data over a network. There are two main kinds of HTTP messages: requests and responses.

HTTPS is basically Secured Hypertext Transfer Protocol, uses TLS (or SSL) to encrypt HTTP requests and responses.

VPN

A VPN, or Virtual Private Network, is a tool that encrypts your internet traffic and hides your IP (Internet Protocol) address to ensure a secure and private connection to the internet. This hides your online activities from third parties snooping around and collecting data.

Load Balancers

Load balancing is the practice of distributing computational workloads between two or more computers. It reduces the strain on each server and makes the servers more efficient, speeding up performance and reducing latency.

Firewalls

A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules. It is wall between a private internal network and the public Internet.

Network Protocols

In networking, a protocol is a set of rules for formatting and processing data. This is basically rules and standards that enable computers to communicate with each other and share data.

Subnetting

A subnet, or subnetwork, is a network inside a network. Through subnetting, network traffic can travel a shorter distance without passing through unnecessary routers to reach its destination. Subnets provides each group of devices have their own space to communicate, that ultimately helps network to work easily.

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