}
    }

    /**
     * Checks if this represents an unknown address.
     *
     * @return whether this is the unknown address
     */
    public boolean isUnknown() {
        return "0.0.0.0".equals(this.name) && this.hexCode == 0 && this.scope == null;
    }

    int writeWireFormat(final byte[] dst, final int dstIndex) {
        // write 0x20 in first byte

        Name name = new Name(mockConfig, "0.0.0.0", 0, null);
        name.scope = null;
        assertTrue(name.isUnknown());
    }

    @Test
    void isUnknown_withNormalName_shouldReturnFalse() {
        Name name = new Name(mockConfig, "TestName", 0x20, null);
        assertFalse(name.isUnknown());
    }

    @Test
    void isUnknown_withNonZeroHexCode_shouldReturnFalse() {

    @Test
    void readRDataWireFormat_shouldHandleUnknownQueryAddress() throws Exception {
        // Setup queryAddress with unknown name
        Name unknownName = mock(Name.class);
        lenient().when(unknownName.isUnknown()).thenReturn(true);
        unknownName.hexCode = 0x20;
        unknownName.scope = null;
        mockQueryAddress.hostName = unknownName;

        response = new NodeStatusResponse(mockConfig, mockQueryAddress);