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Ibrahim S
Ibrahim S

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Demystifying VPCs: Networking Basics for Cloud Engineers

𝗩đ—ļđ—ŋ𝘁𝘂𝗮𝗹 đ—Ŗđ—ŋđ—ļ𝘃𝗮𝘁𝗲 𝗖𝗹đ—ŧ𝘂𝗱 (đ—Šđ—Ŗđ—–) – your own isolated section of the AWS network. Think of it as a đ—Ŋđ—ŋđ—ļ𝘃𝗮𝘁𝗲 𝗱𝗮𝘁𝗮 𝗰𝗲đ—ģ𝘁𝗲đ—ŋ đ—ļđ—ģ 𝘁đ—ĩ𝗲 𝗰𝗹đ—ŧ𝘂𝗱 that you fully control.

🔑 𝗞𝗲𝘆 𝗖đ—ŧđ—ēđ—Ŋđ—ŧđ—ģ𝗲đ—ģ𝘁𝘀 đ—ŧđ—ŗ 𝗮 đ—Šđ—Ŗđ—–:

đ—Ļđ˜‚đ—¯đ—ģ𝗲𝘁𝘀 → Divide your VPC into smaller networks (Public vs Private).
đ—Ĩđ—ŧ𝘂𝘁𝗲 đ—§đ—Žđ—¯đ—šđ—˛đ˜€ → Define how traffic flows inside and outside your VPC.
𝗜đ—ģ𝘁𝗲đ—ŋđ—ģ𝗲𝘁 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 (𝗜𝗚đ—Ē) → Lets public subnets connect to the internet.
𝗡𝗔𝗧 𝗚𝗮𝘁𝗲𝘄𝗮𝘆 → Allows private subnets to reach the internet securely.
đ—Ļ𝗲𝗰𝘂đ—ŋđ—ļ𝘁𝘆 𝗚đ—ŋđ—ŧ𝘂đ—Ŋ𝘀 & 𝗡𝗔𝗖𝗟𝘀 → Act as firewalls to control inbound/outbound traffic.

💡 đ—Ēđ—ĩ𝘆 đ—Šđ—Ŗđ—– đ—ē𝗮𝘁𝘁𝗲đ—ŋ𝘀?

Securely isolate your resources.
Design scalable network architectures.
Control access at a granular level.

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LAN = On-prem, physical, local.
VPC = Cloud-based, virtual, scalable.

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