Course 3, Module 2

Address Resolution Protocol (ARP)

A network protocol used to determine the MAC address of the next router or device on the path.

Cloud-based firewalls

Software firewalls that are hosted by the cloud service provider.

Controlled zone

A subnet that protects the internal network from the uncontrolled zone.

Domain Name System (DNS)

A networking protocol that translates internet domain names into IP addresses.

Encapsulation

A process performed by a VPN service that protects your data by wrapping sensitive data in other data packets.

Firewall

A network security device that monitors traffic to or from your network.

Forward proxy server

A server that regulates and restricts a person’s access to the internet.

Hypertext Transfer Protocol (HTTP)

An application layer protocol that provides a method of communication between clients and website servers.

Hypertext Transfer Protocol Secure (HTTPS)

A network protocol that provides a secure method of communication between clients and servers.

IEEE 802.11 (Wi-Fi)

A set of standards that define communication for wireless LANs.

Network protocols

A set of rules used by two or more devices on a network to describe the order of delivery of data and the structure of data.

Network segmentation

A security technique that divides the network into segments.

Port filtering

A firewall function that blocks or allows certain port numbers to limit unwanted communication.

Proxy server

A server that fulfills the requests of its clients by forwarding them to other servers.

Reverse proxy server

A server that regulates and restricts the internet's access to an internal server.

Secure File Transfer Protocol (SFTP)

A secure protocol used to transfer files from one device to another over a network.

Secure shell (SSH)

A security protocol used to create a shell with a remote system.

Security zone

A segment of a company’s network that protects the internal network from the internet.

Simple Network Management Protocol (SNMP)

A network protocol used for monitoring and managing devices on a network.

Stateful

A class of firewall that keeps track of information passing through it and proactively filters out threats.

Stateless

A class of firewall that operates based on predefined rules and does not keep track of information from data packets.

Subnetting

The subdivision of a network into logical groups called subnets.

Transmission Control Protocol (TCP)

An internet communication protocol that allows two devices to form a connection and stream data.

Uncontrolled zone

The portion of the network outside the organization.

Virtual private network (VPN)

A network security service that changes your public IP address and masks your virtual location to keep your data private when using a public network.

Wi-Fi Protected Access (WPA)

A wireless security protocol for devices to connect to the internet.