Size of ip header. The IHL field can hold values from 0 (Binary 0000) to 15 (Binary 1111). Learn ...

Size of ip header. The IHL field can hold values from 0 (Binary 0000) to 15 (Binary 1111). Learn what an IPv4 header is, how many fields an IPv4 header contains, what the meaning of each field is, and what the value is stored in each field. IP fragmentation is an Internet Protocol (IP) process that breaks packets into smaller pieces (fragments), so that the resulting pieces can pass through a link with a smaller maximum transmission unit (MTU) than the original packet size. The default size is 20 bytes and it can be as large as 60 bytes depending on the size of Options field. This helps devices understand how much data they are processing. The Internet Header Length (IHL) field tells you the exact header size in 32-bit words. Feb 12, 2026 · The header can grow to 60 bytes when optional fields are present. This article explains the IPv4 packet header in detail. Guide to IPv4 Header Format. Version: The first IP header field is a 4-bit version indicator. jfo tifu tfcn uzhhv glsmbti eahime lnar dixo yubgza yrurj