Common Protocols

DNS

Translates domain names into IP addresses.

DHCPv4

Assigns IPv4 addressing information dynamically to clients.

DHCPv6

Assigns IPv6 addressing information dynamically to clients.

SLAAC

Allows a device to obtain IPv6 addressing information without a server.

SMTP

Enables clients to send and receive emails.

POP3

Allows clients to retrieve and download email from servers.

IMAP

Enables clients to access email stored on a mail server.

FTP

Rules for transferring files between hosts over a network.

SFTP

Secure file transfer protocol using encryption.

TFTP

Simple, unacknowledged file transfer protocol.

HTTP

Rules for exchanging multimedia files over the web.

HTTPS

A secure version of HTTP that encrypts data exchanged online.

REST

Web service that uses APIs and HTTP requests.

TCP

Enables reliable communication between processes on separate hosts.

UDP

Allows processes to send packets without confirming transmission.

IPv4

Uses a 32-bit address for end-to-end delivery of packets.

IPv6

Uses a 128-bit address.

NAT

Translates private IPv4 addresses into public addresses.

ICMPv4

Provides feedback about packet delivery errors.

ICMPv6

Similar to ICMPv4 but used for IPv6.

ICMPv6 ND

Used for address resolution and duplicate address detection.

OSPF

Link-state routing protocol based on hierarchical design.

EIGRP

Uses a composite metric for routing decisions.

BGP

Exterior gateway routing protocol used between ISPs.

ARP

Maps IPv4 addresses to hardware addresses.

Ethernet

Defines wiring and signaling standards for the network access layer.

WLAN

Rules for wireless signaling over 2.4 GHz and 5 GHz.