- You should know how does the Internet Works?
Summary:
- Tier 1 Companies (Optic Fibre Companies - Example: AT&T, Tata Communications, NTT, Level 3 (Lumen), Telia Carrier)
- Tier 2 Companies (Telecom Companies- SingTel (Singapore), Vodafone, Comcast, Airtel.)
- Tire 3 Companies (ISP Companies- MyRepublic (SG), StarHub, Spectrum, BSNL, ACT Fibernet.)
- WAN - MAN - LAN - PAN Networks
- OSI Model and TCP/IP Model Concept and Understanding
- UDP and TCP Understanding
- Conceptual Understanding of Public IP and Private IP
- What are PORTS and different Port Numbers
- What are IP Addresses?
- There are a total of 4,294,967,296 unique IPv4 addresses, which is calculated by 2^32. This 32-bit address space contains billions of addresses but is not large enough for the global internet, leading to the ongoing IPv4 exhaustion and transition to IPv6.
- IPv6 contains a total of 2^128, or approximately 3.4 x 10^38 (340 undecillion) unique IP addresses. This immense address space is designed to provide a practically inexhaustible supply of addresses for the foreseeable future, a significant improvement over the 32-bit address limit of IPv4.
- What are MAC Addresses? Types of MAC Addresses
- What is a Router, Switch and GateWay?
- Switch → Used inside a LAN. Just helps devices in the same network talk (like computers in the same office).
- Router → Connects your LAN to other networks (like the Internet).
- Gateway → Works like a translator between networks that use different rules or protocols.
- Server, Instance, Host, Node, Machine, Virtual Machines(VM) are all the same things
- What is CLOUD - Public and Private?
- What is on-premise (SERVER ROOMS) ?
- **AWS GLOBAL INFRASTRUCTURE - Understand the concepts of Zones**
AWS has 41 Availability Zones within 13 Geographic Regions, with 23 Edge Network Locations and 4 Edge Cache Locations.
- AWS Pricing Calculator
- Setting up EC2 Instance on AWS (Free Tier)