IPv4 header Length

The minimum length of an IP header is 20 bytes so with 32 bit increments, you would see value of ...

IPv4 Version (4-bit) 表示這是IPv4 header(數值為0100) Header Length (4-bit), 最小值是5, 即20-byte , 最大值為15,

The general structure of the IPv4 packet is shown in Figure 7.3. The minimum header (using no opt...

首部長度（Internet Header Length， IHL）: 占4bit，首部長度說明首部有多少32位元字（4位元組）。由於IPv4首部可能包含數目不定的選項，這個欄位也用來確定資料的偏...