Network Protocols

Dynamic Host Contfiguration Protocol - Leases address to clients/nodes on a network. It can also manage the available addresses.

Can be used in a closed private network, LAN or WAN. Can be used by Internet Service Providers (ISPs) to distribute IP address to it's customers/clients.

Protocol where data is sent from one computer to another. IPs can be temporary and are not fixed to a specific machine.

These are interpreted by each router and translated based on DNS entries.

Responsible for message delivery. Most common use is for pings. Confirms requests and responses.

Used to send data across a network. Reliable and connection oriented because it happens at Layer 4: Transfter

Used by programs/applications running on different computers on a network. Used to send datagrams (the packet header and data combined)

Primarily used for internet data. Stateless and connectionless protocol. Simply delivers the data to be presented.

Layer 7

Secure HTTP transferes through a secure socket layer (SSL) or transport layer security (TLS) protocol connection. Connection is confirmed, secure, and remains open as long as needed.

Layer 6 - SSL & TLS operate at layer 6 as well when isolated

Used for transferring files to or exchanging files with a host computer. Uses TCP and IP networks

Layer 7 - Can work on IP or TCP

Used to extract and retrieve email from a remote mail server. Used to retrieve email from mobile and portable devices.

Layer 7

used to retrieve mail from a server. Allows you to have more control over how you manage your email and email account.

Allows you to push email to a mail server.