Question

An AI generated this Rust code to serialize a port number and sequence value into a fixed network header before sending. It compiles and round-trips fine in the same process. Explain why a peer on a different machine misreads the header, the trigger, and the fix.

1fn write_header(seq: u32, port: u16) -> [u8; 6] {2    let mut hdr = [0u8; 6];3    let seq_bytes = seq.to_ne_bytes();4    let port_bytes = port.to_ne_bytes();5    hdr[0..4].copy_from_slice(&seq_bytes);6    hdr[4..6].copy_from_slice(&port_bytes);7    hdr8}