DYNAMIC IP ADDRESS

DHCP = DYNAMIC HOST CONFIGURATION PROTOCOL

DHCP is a type of server that automatically gives you a new IP ADDRESS each time. No longer static IP.

VPN disguises all IP ADDRESSES!

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OPEN NETWORK & SHARING - CHANGE ADAPTOR SETTINGS 

- PROPERTIES - INTERNET PROTOCOL TCP/IPv?

You can toggle between DHCP "obtain IP automatically" or manually enter one.

COMMAND SCREEN will reveal even more (like DHCP server address): >ipconfig /all

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If DHCP server goes down? 

your PC has "APIPA" to fallback on to assign new IP addy. 

**But this is only for office intranet**

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OPEN NETWORK & SHARING - CHANGE ADAPTOR SETTINGS 

- PROPERTIES - INTERNET PROTOCOL TCP/IPv?

- then go to "alternate configuration" tab. to toggle

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Apipa ALWAYS gives out addresses like this: 169.254.?.? *CLASS B address

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Sometimes you can't get on internet & **it's because your settings are stuck on APIPA**

COMMAND SCREEN will reveal if you're stuck on APIPA:

>ipconfig = will reveal if your IP ADDRESS is an APIPA 169.254.?.? 

if your address looks like that you have a DHCP server problem

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How to attempt to Reboot this problem

COMMAND SCREEN:

>ipconfig /renew = will usually fix connection to DHCP server

>ipconfig /release = will disconnect your from DHCP server

**EVEN EASIER**

Just right click network symbol bottom right + troubleshoot problems tool. It will try to reboot automatically w/o having to go through COMMAND SCREEN

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find APIPA

OPEN NETWORK & SHARING - CHANGE ADAPTOR SETTINGS - PROPERTIES - INTERNET PROTOCOL TCP/IPv

- "alternate configuration" tab - turn off automatic 

& manually enter a IP ADDRESS if DHCP server is down 

!!Be careful doing this!!

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IPv6 the newest latest!

172.16.254.1 = IPv4 example

2001:0db8:85a3:0000: 0000:8a2e:0370:7334 = IPv6 example (7 colons)

**easier to delete "leading" 4 zeros**

4 - 3 = 1 zero left

2001:0db8:85a3:0000: 0000:8a2e:0370:7334

2001:0db8:85a3:0: 0:8a2e:0370:7334 = IPv6 example w/no leading zeros

**triple zeros can be deleted? turned into colons**

2001:0:0:1:0:0:0:8a2e

2001:0:0:1::8a2e

Nowadays you have a minimum of 2 long IP ADDRESSES w/ IPv6