IP

MAC Address length :6byte=48bit 3byte(OUI)+3byte(PID)

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IP Address Version 4 length : 4byte=32bit Network ID(same part) +Host ID(id)

00000000.00000000.0000000.00000000 (2)

~

11111111.11111111.11111111.11111111

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Network ID,Host ID -> subnetmask

255.255.255.0

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Network ID->1 Host ID ->0

11111111.11111111.11111111.00000000 subnetmask

255.255.255.0

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ex)

192.168.0.0 ->first ip : Network Address ,Host id=0,routing table

192.168.0.1~192.168.0.254 //assigined

192.168.255.255 ->last ip address :broascast address ,Host id =1

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CLASS

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A

0-127 (128ea)

N.H.H.H (2^24-2)

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B

128-191(64ea)

N.N.H.H (2^16-2)

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C

192-223(32ea)

N.N.N.H (2^8-2)

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D

224-239(16ea)

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E

240-255(16ea)

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https://www.iana.org/

Internet Assigned Numbers Authority

Domain Names Management of the DNS Root Zone (assignments of ccTLDs and gTLDs) along with other functions such as the .int and .arpa zones. Root Zone Management Database of Top Level Domains .int Registry .arpa Registry IDN Practices Repository Number Resources Coordination of the global IP and AS n...

www.iana.org

https://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml

IANA IPv4 Address Space Registry

Prefix Designation Date WHOIS RDAP Status [ 1 ] Note 000/8 IANA - Local Identification 1981-09 RESERVED [ 2 ][ 2bis ] 001/8 APNIC 2010-01 whois.apnic.net https://rdap.apnic.net/ ALLOCATED 002/8 RIPE NCC 2009-09 whois.ripe.net https://rdap.db.ripe.net/ ALLOCATED 003/8 Administered by ARIN 1994-05 who...

www.iana.org

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