DCN386 - IP

DCN386 - IP - However, the delivery of the datagram to the...

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What does IP do and how does it work? (5 Marks) IP is the Internet's most basic protocol. It belongs to the Network Layer (layer 3) in the OSI model and it is responsible for moving packet of data from node to node across multiple networks . IP forwards each packet based on a four byte destination address. IP is an unreliable, best effort delivery, connection-less protocol used for transmitting and receiving data between hosts in a TCP/IP network. IP is an unreliable protocol because it does not guarantee the delivery of a datagram to its destination. The reliability must be provided by the upper layer protocols like TCP. IP does not support flow control, retransmission, acknowledgement and error recovery.IP is a best-effort protocol, because it will make every effort to always transmit a datagram. IP won’t simply discard them.
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Unformatted text preview: However, the delivery of the datagram to the destination is not guaranteed. IP is a connection-less protocol because it does not maintain information about the connection to a destination host. Each datagram is handled independent of other datagrams and also each datagram may reach the destination through different network routes. The data from higher-level protocols like TCP and UDP are encapsulated into an IP datagram and transmitted to the destination host. IP will not modify the higher-level data. The minimum size of an IP datagram is 576 bytes and the maximum size is 65535 bytes. The minimum size of an IP datagram header is 20 bytes. The maximum IP datagram header size is 60 bytes. All IP networks must be able to handle datagrams of at least 576 bytes in length....
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This note was uploaded on 04/18/2011 for the course DCN 386 taught by Professor Allison during the Spring '10 term at Seneca.

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