OLD ASS EARLY INTERNET

 

Class C IP ADDRESS =  210.11.12.?

your first 3 clusters of IP ADDRESS are set in stone. 4th cluster is unique

Class B IP ADDRESS =  210.11.?.?

First 2 clusters of IP ADDRESS set in stone. 3rd & 4th cluster unique

Class A IP ADDRESS =  210.?.?.?

First cluster of IP ADDRESS set in stone. 2nd, 3rd, & 4th cluster unique

Class C IP ADDRESS = only 254 hosts

Class B IP ADDRESS = 65,534 hosts

Class A IP ADDRESS = Millions of hosts

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Class A IP ADDRESS =  126.?.?.?

in class A the first cluster could only start with a 1 or 126!

Class B IP ADDRESS =  128.11.?.?

First cluster could be anywhere between 128-191

Class C IP ADDRESS =  223.11.12.?

First cluster could be only be between 192-223

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**SPECIAL IP ADDRESSES**

Class D-"multicast" IP ADDRESS = 224.?.?.?

First cluster could only start w/224 (these were for live presentations)

spooky Class E "reserved" IP ADDRESS = 240.?.?.?

First cluster could only start w/240

allegedly- it's a mystery who actually uses these!!

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PRIVATE IP ADDRESSes (INTRANET)

1. CLASS A = 10.?.?.?

2. CLASS B = 172.16.?.?   through  172.31.?.?

3. CLASS C = 192.168.1.?

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LOOPBACK IP ADDRESS = 127.0.0.1

*LOOPBACK refers to your own system*

ADMIN COMMAND on PROMPT SCREEN you can >ping "Type your IP ADDRESS here"

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IPCONFIG

ADMIN COMMAND on PROMPT SCREEN: type "ipconfig" after "C:\WINDOWS\system32\"

IPCONFIG will show all of your network info. *called "iFconfig" on Apple & Linux*

ADMIN COMMAND on PROMPT SCREEN you can >ping "type your GATEWAY ADDRESS HERE"

If you can ping something - you know it's working!!

ADMIN COMMAND on PROMPT SCREEN: type "ipconfig /all" after "C:\WINDOWS\system32\"

ADMIN COMMAND on PROMPT SCREEN: 

type ">ping -t" after "C:\WINDOWS\system32\" then "type your GATEWAY ADDRESS again"

** ">ping -t" command just keeps pinging the IP ADDRESS over & over again**

Good for when You're testing connections