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2. The Free Software Definition - Wikipedia

   en.wikipedia.org/wiki/The_Free_Software_Definition

   The modern definition defines free software by whether or not the recipient has the following four freedoms: [8] The freedom to run the program as you wish, for any purpose (freedom 0). The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this.

3. Physical security - Wikipedia

   en.wikipedia.org/wiki/Physical_security

   Access credentials - Access cards, fobs, or badges are used to identify and authenticate authorized users. Information encoded on the credentials is read by card readers at entry points. Access control panels - These control the system, make access decisions, and are usually located in a secure area.

4. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   Common physical security access control with a finger print A sailor checks an identification card (ID) before allowing a vehicle to enter a military installation.. In physical security and information security, access control (AC) is the selective restriction of access to a place or other resource, while access management describes the process.

5. SD-WAN - Wikipedia

   en.wikipedia.org/wiki/SD-WAN

   Independent of safety concerns, connectivity to the Internet became a necessity to the point where every branch required Internet access. At first, due to safety concerns, private communications were still done via WAN, and communication with other entities (including customers and partners) moved to the Internet.

6. Wireless ad hoc network - Wikipedia

   en.wikipedia.org/wiki/Wireless_ad_hoc_network

   A wireless ad hoc network [1] (WANET) or mobile ad hoc network (MANET) is a decentralized type of wireless network.The network is ad hoc because it does not rely on a pre-existing infrastructure, such as routers or wireless access points.

7. Carrier-sense multiple access with collision avoidance

   en.wikipedia.org/wiki/Carrier-sense_multiple...

   Carrier-sense multiple access with collision avoidance (CSMA/CA) in computer networking, is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by beginning transmission only after the channel is sensed to be "idle". [1] [2] When they do transmit, nodes transmit their packet data in its entirety.

8. IEEE 802.1X - Wikipedia

   en.wikipedia.org/wiki/IEEE_802.1X

   The authenticator is a network device that provides a data link between the client and the network and can allow or block network traffic between the two, such as an Ethernet switch or wireless access point; and the authentication server is typically a trusted server that can receive and respond to requests for network access, and can tell the ...

9. Point-to-multipoint communication - Wikipedia

   en.wikipedia.org/wiki/Point-to-multipoint...

   Often the point to multipoint links are installed to reduce the cost of infrastructure and increase the number of CPE's and connectivity. [2] Point-to-multipoint wireless networks employing directional antennas are affected by the hidden node problem (also called hidden terminal) in case they employ a CSMA/CA medium access control protocol. The ...