1.3.2 Wired/Wireless Networks and Protocols

Wired connections

Ethernet

Wireless connections

Wi-Fi/Bluetooth

Ethernet

Standard for networking technologies

Wi-Fi (Wireless Fidelity)

Portable connection to internet

Bluetooth

Used to connect personal devices

Cipher text

Scrambled text

Handshake protocol

Ensures receiver has master key

Media Access Control address (MAC address)

Used to route frames on a LAN

Internet Protocol address (IP address)

Used to route frames/packets on a WAN

IPv4

Unique number used to identify a host computer or node which communicates over IP on the internet

Standards

A set of specifications for hardware and software, making it possible for manufacturers and producers to create services that are compatible with each other

Protocol

A set of standards which allow two devices to communicate

HTML

An early standard adopted on the WWW for displaying webpages in browsers

IEEE

Standards for computer cables

PDF/PNG/MP3

Document/Image/Sound standards

TCP/IP

Communication over LANs and WANs, foundation of communication over the internet

HTTP(S)

Webpage request, client and server send and receive requests, fundamental protocol of the WWW (Secure adds authentication)

FTP (File Transfer Protocol)

Used to send files between computers, usually on a WAN

SMTP (Simple Mail Transfer Protocol)

Transfers outgoing emails from one server to another

IMAP (Internet message Access Protocol)

Keeps mail on the server, allowing for synchronicity between devices

POP (Post Office Protocol)

Retrieves emails from a mail server, then removes it from the server and transfers it to your device

Layers

Diving networking into smaller, simpler tasks that work with each other

Layer 4

Browser using https

Layer 3

TCP error handling

Layer 2

IP routing

Layer 1

MAC frames