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there are three level addressing

1. physical addressing - in the physical layer. it is mostly used in LAN networks

2. logical addressing - in the network layer. every host has unique ip address.it also known as IP address.

3. port addressing - It is used in multiprogramming for every process there is unique port address.

  • At the hardware Ethernet or WIFI level, their is a 48 bit MAC (Media Access Control) address built into the network interface adapter. It is treated as 12 hexadecimal (0123456789ABCDEF) digits. Part of the MAC address identifies the device manufacturer. The rest is assigned by the manufacturer to individual devices/
  • Each TCPIP host (computer, router, printer, scanner, etc.) has an IP (internet Protocol) address assigned to it. This can be an IPv4 (version 4) 32 bit address or the newer IPv6 (version 6) 128 bit address which is not yet widely available. A host can only communicate with other hosts using the same version of IP address and hosts can be configured to use both addressing forms so that it can "talk"to anybody. In order to be usable on the internet the address needs to be assigned by an organization responsible for managing internet addresses or by a local internet provider. Unauthorized addresses are blocked from internet access.
  • Networks and hosts can also have a name (or Domain Name) assigned to them (like answers.com). Their is a system of Name Servers that allows translation of a domain name to an one or more IP addresses so that when you want answers.com, it will reach 192.41.64.65 or another address listed as responding to that name.
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Q: Explain three different levels of addressing in TCPIP model?
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