int size2 = echoRequest.size();

            assertEquals(size1, size2);
        }

        @Test
        @DisplayName("Size should be 72 bytes (64 header + 4 body aligned to 8)")
        void testExactSize() {
            // SMB2_HEADER_LENGTH = 64, body = 4, total = 68
            // size8 aligns to 8-byte boundary: (68 + 7) & ~7 = 72
            assertEquals(72, echoRequest.size());
        }
    }