NETWORK LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Header Checksum
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Time to Live
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Protocol
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Differentiated Services
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Detailed explanation-1: -The Internet checksum, also called the IPv4 header checksum is a checksum used in version 4 of the Internet Protocol (IPv4) to detect corruption in the header of IPv4 packets. It is carried in the IP packet header, and represents the 16-bit result of summation of the header words.
Detailed explanation-2: -Padding: Padding is used to validate that the IP packet header’s length is a multiple of 32 bits. It is necessary due to the variable length of the IP header’s options field.
Detailed explanation-3: -A checksum is a simple error-detection scheme in which each transmitted message that results in a numerical value based on the value of the bytes in a message. The sender places the calculated value in the message (usually in the message header) and sends the value with the message.
Detailed explanation-4: -The two most commonly referenced fields are the source and destination IP addresses. These fields identify where the packet is from and where it is going.