They're also concrete: each URL identifies a specific path (like `/square/okhttp`) and query (like `?q=sharks&lang=en`). Each webserver hosts many URLs.

### [Addresses](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-address/)

Addresses specify a webserver (like `github.com`) and all of the **static** configuration necessary to connect to that server: the port number, HTTPS settings, and preferred network protocols (like HTTP/2).

    val result = proxies[nextProxyIndex++]
    resetNextInetSocketAddress(result)
    return result
  }

  /** Prepares the socket addresses to attempt for the current proxy or host. */
  @Throws(IOException::class)
  private fun resetNextInetSocketAddress(proxy: Proxy) {
    // Clear the addresses. Necessary if getAllByName() below throws!
    val mutableInetSocketAddresses = mutableListOf<InetSocketAddress>()

    }

    /**
     * Gets the list of new IP addresses.
     *
     * @return the new IP addresses
     */
    public List<WitnessIPAddress> getNewIPAddresses() {
        return newIPAddresses;
    }

    /**
     * Gets the list of old IP addresses.
     *
     * @return the old IP addresses
     */
    public List<WitnessIPAddress> getOldIPAddresses() {

     * fallbacks to prevent the host machine's various IP addresses from interfering.
     */
    private val SINGLE_INET_ADDRESS_DNS =
      Dns { hostname ->
        val addresses = Dns.SYSTEM.lookup(hostname)
        listOf(addresses[0])
      }

    private operator fun Throwable?.plus(throwable: Throwable): Throwable {
      if (this != null) {

			// the 'for=' capture, which we ignore. In the case of multiple IP
			// addresses (for=8.8.8.8, 8.8.4.4, 172.16.1.20 is valid) we only
			// extract the first, which should be the client IP.
			if match := forRegex.FindStringSubmatch(fwd); len(match) > 1 {
				// IPv6 addresses in Forwarded headers are quoted-strings. We strip
				// these quotes.
				addr = strings.Trim(match[1], `"`)
			}
		}

import okio.Buffer

/**
 * Quick and dirty pattern to differentiate IP addresses from hostnames. This is an approximation
 * of Android's private InetAddress#isNumeric API.
 *
 * This matches IPv6 addresses as a hex string containing at least one colon, and possibly
 * including dots after the first colon. It matches IPv4 addresses as strings containing only

    }

    /**
     * Retrieve all addresses of a host by it's address. NetBIOS hosts can
     * have many names for a given IP address. The name and IP address make the
     * NetBIOS address. This provides a way to retrieve the other names for a
     * host with the same IP address.
     *
     * @param host hostname to lookup all addresses for
     * @return array of NetBIOS addresses

     * <li>indexed properties (java.util.List or array instance) should be contains <code>(\\w+)\\[(\\d+)\\]</code>
     * pattern, i.e. "user.addresses[1].street"</li>
     * <li>mapped properties should be contains <code>(\\w+)\\((.+)\\)</code> pattern,
     *  i.e. "user.addresses(myAddress).street"</li>
     * </ul>
     *
     * @param expression not null expression
     * @param root       not null object

        // Then: Should connect to IPC$ share
        verify(tree).connectLogon(ctx);
    }

    @Test
    @DisplayName("Should sort addresses by fail count and failover")
    void testFailoverWithFailCounts() throws Exception {
        // Given: Multiple addresses with different fail counts
        Address addr1 = mock(Address.class);
        when(addr1.getHostAddress()).thenReturn("10.0.0.1");

        NbtAddress[] addresses = new NbtAddress[2];
        // Create dummy NbtAddress objects for testing toString
        addresses[0] = new NbtAddress(mockRecordName, 0xC0A80101, false, 0); // 192.168.1.1
        addresses[1] = new NbtAddress(mockRecordName, 0x0A000005, true, 1); // 10.0.0.5
        addrEntryField.set(nameQueryResponse, addresses);

        String expectedContains = ",addrEntry=[";