Basics: Networks

1. Wires Cables and Wifi (less than 7 minutes)

measuring data: binary, bit, byte, kilobyte, megabyte, gigabyte, terrabyte

data throughput and speed: bandwidth, bitrate, latency, requesting device

modes of transmitting data: copper wire, electricity, light, fiber optic cable, thread of glass, bounce angle, radio signal, wireless, signal degradation, wifi, satellite

⇒ https://www.submarinecablemap.com/

2. IP addresses and DNS (less than 7 minutes)

Vint Cerf, Bob Kahn, internet, internet protocol (IP), network, ISP, IP address(es), IP hierarchy

⇒ Pinging a a domain to find the IP address:

computername:~ username$ ping unc.edu

⇒ Result:

PING unc.edu (152.2.64.93): 56 data bytes

early numbers are usually country numbers and regional numbers then subnetworks the the address of the device

IP4,IPv6, DNS, DNS server, zones, domain, top level domain (official list)

⇒ DNS Propagation Checker

3. Packets Routers and reliability (less than 7 minutes)

IP packets, routes, cheapest path, TCP, TCP/IP  ⇒TCP Joke

TCP inventory, acknowledgment, verification, sign, scaleable

4. HTTP and HTML (just at 7 minutes)

URL, server, HTTP, GET Request, HTML

HTTP POST, SSL, TLS, HTTPS

5. Encryption and Public Keys (less than 7 minutes)

encryption, Caesar's Cipher, algorithm, key, 256 bit keys ⇒ random key generator, symmetric encryption, asymmetric key, private key, public key

6. Cybersecurity and Crime (just at 5 minutes)

Cybersecurity viruses, DDOS attacks, phishing, hacker, botnet

⇒ social engineering hacking is not mentioned in this video, but it is very important for you to understand

• How the internet works Khan Academy
• Root Servers
• Root-Servers.org