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Addressing Fundamentals

Internetworking Fundamentals

Instructor: Abdirahman I. Abdi

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Methods of communicating in the LAN

Unicast

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Broadcast

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Multicast

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16,777,214

65,534

254

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Reserved IPv4 Address Ranges

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Address types

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Network Address

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Broadcast Address

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Host Address

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Public Vs. Private Address

Public addresses are usable on the internet as well as internal networks

Private addresses are usable only in internal Networks

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Private IP addresses

Unrestricted use on private networks. Not routed across the Internet.

10.0.0.0 – 10.255.255.255 (10.0.0.0/8)

172.16.0.0 – 172.31.255.255 (172.16.0.0/20)

192.168.0.0 – 192.168.255.255 (192.168.0.0/24)

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Public IP addresses

Routed over the Internet Master holder is Internet Assigned Numbers

Authority (IANA) Assigned to regional registries and then to

ISPs ISPs allocate them to organisations and

individual users Use is strictly controlled as duplicate

addresses are not allowed

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AfriNIC (African Network Information Centre) - Africa Region http://www.afrinic.net

APNIC (Asia Pacific Network Information Centre) - Asia/Pacific Region http://www.apnic.net

ARIN (American Registry for Internet Numbers) - North America Region http://www.arin.net

LACNIC (Regional Latin-American and Caribbean IP Address Registry) - Latin America and some Caribbean Islands http://www.lacnic.net

RIPE NCC (Reseaux IP Europeans) - Europe, the Middle East, and Central Asia http://www.ripe.net

The major regional registries

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