AUTOMIC PRIVATE IP ADDRESSING (APIPA)

APIPA-

             ( AUTOMATIC PRIVATE IP ADDRESSING  IS A ADDRESSING) FEATURE FOR SINGLE NETWORK  SEGMENT. WHENEVER A COMPUTER RUNNING WINDOWS HAS BEEN CONFIGURED  OBTAIN ON IP ADDRESS AUTOMATICALLY AND WHEN D.H.C.P.  OR ETHERNET CONFIGURATION

IS AVAILABLE THE COMPUTER USES APIPA TO ASSIGN IN THE  RANGE  OF 

169.254.0.1 TO 169.254.255.254

PRIVATE ADDRESS

1.ACCORDING TO RFC-1918


2.ORGANIZATIONS MAKE USE OF THE PRIVATE INTERNET ADDRESS SPACE FOR HOSTS THAT REQUIRE IP CONNECTVITY 
WITH IN THEIR ENTERPRISE NETWORK BUT DO NOT  REQUIRE EXTERNAL CONNECTIONS TO THE GLOBAL INTERNET


3.CLASS A: 10.0.0.0

4.CLASS B :172.16.0.0,172.31.0.0

5CLASS C :192.168.0.0,192.168.255.0



SOME FULL FORMS-
                  RFC=REQUEST FORM COMMENTS
                  AWG=AMERICAN WIRED GAUGE
                  

MAKE CROSS CABLE

CROSS CABLE USED FOR SAME USED

(@).COMPUTER TO COMPUTER, SWITCH TO SWITCH, ROUTER TO ROUTER



1.ORANGE/WHITE          1.GREEN/WHITE
2.ORANGE                        2.GREEN
3.GREEN/WHITE             3.ORANGE/WHITE
4.BLUE                              4.BLUE
5.BLUE/WHITE                5.BLUE/WHITE
6.GREEN                           6.ORANGE
7.BROWN/WHITE            7.BROWN/WHITE
8.BROWN                           8.BROWN

MAKE STRAIGHT CABLE

U.T.P. (UNSHEILED TWISTED PAIR CABLE)-
                                                                               
USED- COMPUTER TO SWITCH , SWITCH TO ROUTER , ROUTER TO SWITCH




1. ORANGE/WHITE          1.ORANGE/WHITE
2.ORANGE                         2.ORANGE
3.GREEN/WHITE              3.GREEN/WHITE
4.BLUE                               4.BLUE
5.BLUE/WHITE                 5.BLUE/WHITE
6.GREEN                            6.GREEN
7.BROWN/WHITE             7.BROWN/WHITE 
8.BROWN                           8.BROWN

BROADCAST ADDRESS

1. BROADCAST GOES TO EVERY HOST WITH A PARTICULAR NETWORK ID NUMBER


2.AN IP ADDRESS THAT ENDS WITH BINARY  IS  IN  ALL HOST BITS IS RESERVED FOR THE  DIRECTED BROADCAST ADDRESS


3.AN IP ADDRESS WITH BINARY IS IN  ALL NETWORK BITS IS RESERVED FOR THE LOCAL BROADCAST ADDRESS

NETWORK ADDRESS

1.NETWORK ADDRESS PROVIDE A CONVENIENT  WAY TPO REFER TO ALL OF THE ADDRESS  ON A PARTICULAR  NETWORK  OR SUBNETWORK


2.TWO HOSTS WITH DEFFERING NETWORK  ADDRESS REQUIRE A DEVICE TYPICALLY  ROUTER IN ORDER TO COMMUNICATE 


3. AN IP ADDRESS THAT ENDS WITH BINARY IN ALL HOST BITS IS RESERVED FOR THE NETWORK ADDRESS

IP ADDRESS CLASSES : SUMMARY

1. 1.0.0.0-127.0.0.0 :CLASS A


2. 127.0.0.0 : LOOP BACK ADAPTER

3. 128.0.0.0 -191.255.0.0 :CLASS B


4. 192.0.0.0-223.225.255.0 :CLASS C


5. 224.0.0.0 < 240.0.0.0 :CLASS D                                                                                (MULTICAST)


6. >=240.0.0.0      : CLASS E      (RESERVED)