Creating and Maintaining Home Networks
Internet Service Provider (ISP)

http://edu-observatory.org/olli/Networks/ISP.html



INTERNET SERVICE PROVIDER (ISP)

Wikipedia: Internet Service Provider (ISP)
  https://en.wikipedia.org/wiki/Internet_service_provider
  
  An Internet service provider (ISP) is an organisation that
  provides services for accessing, using, or participating in
  the Internet. Internet service providers can be organized in
  various forms, such as commercial, community-owned,
  non-profit, or otherwise privately owned.

  Internet services typically provided by ISPs can include
  Internet access, Internet transit, domain name registration,
  web hosting, Usenet service, and colocation.

  An ISP typically serves as a connection or gateway that
  provides a user, access to everything available on the
  Internet.




Who is My Current Internet Service Provider?
  https://bgp.he.net
  https://www.test-ipv6.com
  
What is My Current Internet Service Provider Bandwidth/Speed?
  https://fast.com
  https://speedtest.tds.net
  https://mediacomcable.com/speedtest/
  https://chicago.speedtest.centurylink.net/speedtest5.html

  
Wikipedia: Carrier-grade NAT
  https://en.wikipedia.org/wiki/Carrier-grade_NAT#Disadvantages
  
  Many cell phone carriers (AT&T, Verizon, T-Mobile, etc.) and
  Some Fiber Optic ISPs use Carrier-grade NAT as there are not
  enough IPv4 addresses for all of their customers.

  From the command line:
  traceroute -aI `curl --connect-timeout 1 -s ipinfo.io/ip`
  If more than one hop, your IP address is behind a NAT.

  open -a "AirPort Utility.app" to demo router's 
    WAN IP address
    LAN IP address

  If your WAN IP address, as shown on your Router, is:

    10.0.0.0     -  10.255.255.255   (10.0.0.0/8)   16,777,216
    172.16.0.0   -  172.31.255.255   (172.16.0.0/12) 1,048,576
    192.168.0.0  -  192.168.255.255  (192.168.0.0/16)   65,536

  then you are NAT'd. These are private IP addresses, as 
  defined in RFC 1918.
    https://www.ripe.net/participate/member-support/lir-basics/ipv6_reference_card.pdf
  
  BeeNetTools (App for iOS, iPadOS) Ping, Traceroute, & MTR
    https://apps.apple.com/us/app/beenettools/id1160138136

  
  

 
    sam.wormley@gmail.com