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2. Black hole (networking) - Wikipedia

   en.wikipedia.org/wiki/Black_hole_(networking)

   The most common form of black hole is simply an IP address that specifies a host machine that is not running or an address to which no host has been assigned.. Even though TCP/IP provides a means of communicating the delivery failure back to the sender via ICMP, traffic destined for such addresses is often just dropped.

3. Private VLAN - Wikipedia

   en.wikipedia.org/wiki/Private_VLAN

   A firewall can replace a router, and then hosts can be slowly moved to their secondary VLAN assignment without changing their IP addresses. There is a need for a firewall with many tens, hundreds or even thousands interfaces.

4. Point-to-Point Protocol over Ethernet - Wikipedia

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

   The Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It appeared in 1999, in the context of the boom of DSL as the solution for tunneling packets over the DSL connection to the ISP's IP network, and from there to the rest of the Internet.

5. Hop (networking) - Wikipedia

   en.wikipedia.org/wiki/Hop_(networking)

   The router discards any packets received with a zero TTL value. This prevents packets from endlessly bouncing around the network in the event of routing errors. Routers are capable of managing hop counts, but other types of network devices (e.g. Ethernet hubs and bridges) are not.

6. Router (computing) - Wikipedia

   en.wikipedia.org/wiki/Router_(computing)

   When multiple routers are used in interconnected networks, the routers can exchange information about destination addresses using a routing protocol.Each router builds up a routing table, a list of routes, between two computer systems on the interconnected networks.

7. IEEE 802.11r-2008 - Wikipedia

   en.wikipedia.org/wiki/IEEE_802.11r-2008

   IEEE 802.11r-2008 or fast BSS transition (FT), is an amendment to the IEEE 802.11 standard to permit continuous connectivity aboard wireless devices in motion, with fast and secure client transitions from one Basic Service Set (abbreviated BSS, and also known as a base station or more colloquially, an access point) to another performed in a nearly seamless manner.