What Does An Ip Packet Look Like?
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The IP packet header contains the following fields:
• Version: This is a 4–bit field that indicates the version of the IP protocol being used.
• Header length: This is a 4–bit field that indicates the length of the header in 32–bit words.
• Type of Service: This is an 8–bit field that can be used to indicate the priority and type of service requested.
• Total Length: This is a 16–bit field that indicates the total length of the IP packet, including both the header and data
. • Identification: This is a 16–bit field that is used to help piece together fragmented IP packets.
• Flags: This is a 3–bit field used to indicate whether the packet can be fragmented or not.
• Fragment Offset: This is a 13–bit field used to indicate the position of a fragment in a series of fragmented IP packets.
• Time to Live: This is an 8–bit field that indicates the maximum number of hops the packet can take before it is discarded.
• Protocol: This is an 8–bit field that indicates which upper–layer protocol is encapsulated in the IP packet.
• Header Checksum: This is a 16–bit field used to verify the integrity of the IP header.
• Source IP Address: This is a 32–bit field that indicates the source of the IP packet.
• Destination IP Address: This is a 32–bit field that indicates the destination of the IP packet.
• Options: This is an optional field in the IP header that can contain additional control information.