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5

This level of install requires professionals, or at least experience. 1) 87 apartments means deploying dozens of access points (at least 1 per 3 apartments, possibly 1 per apartment, to be sure you would need to do a “site survey” with test APs and map signal strength). Best placement is on the ceiling. 2) Each access point requires ethernet cabling back ...


0

What will these origin and destination ports be? The origin/Source port is randomly selected by the client. The destination port is determined by the Application. For example, if I'm making a web request (HTTP), my destination port will be TCP port 80, and my source port will be randomly selected. To take that a step further, let's use your example: ...


4

... nothing but ... No, definitely not. Of course, the Internet is held together by routers, but those routers require a global numbering plan (like unambiguous public addresses), agreed-upon protocols (like DNS, SMTP, HTTP) and procedures to exchange information about each others' networks (like BGP), and some more "glue" (like centralized root DNS ...


6

An internet (lower-case "i") is a network of networks. The Internet (upper-case "I") is the largest internet (network of networks). The networks comprising the Internet connect to each other by agreement of the network owners (companies) using BGP as the routing protocol. IP stands for Internet Protocol. Layer 3 of the OSI model (IP) is the lowest layer ...


1

Short answer: No, and no. Long answer: At the time X.25, Frame Relay, and ATM were in widespread use, voice networks were still largely "circuit switched," meaning, a dedicated data channel was likely to exist between the PSTN switches terminating each end of a phone call. The PSTN inter-exchange switches themselves handled the circuit-switching. The ...


0

When the telephone networks were digitalized in the 1980s and 90s using ATM and SDH, protocols such as PSTN, X.25, Frame Relay or MPLS became applications running on top of those networks. Dedicated networks were possible but uncommon for wide-range communciation.


3

The Internet is the prime example for a decentralized network and has likely supplanted most other designs. There are bodies controlling or coordinating some aspects of the Internet to allow interoperability, but the network itself is completely decentralized.


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