The stack length refers to the name of the physical device or storage unit used to store stack data in a computer network. A stack is a data structure used to store and transfer data in a series of operations. In computer networks, stacks are usually used to store information in the protocol stack, such as data packets in the protocol stack and requests and responses in the network layer protocol stack. In the network stack, the length of the stack is usually expressed as the address of the top element. The length of the stack in the protocol stack is usually 4KB, and the address of the top element of the stack is 0x7f972ede. The name and address of the stack leader could be different according to different network protocol and devices. For example, the stack leader in the Hypertext Packet Transfer Request protocol is usually called the "request header" or "request header", and its address is 0x7f973000.