Oracle 18c

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select item
from XMLTable(
  XMLNamespaces (
    default 'urn:DHCPProv',
    'http://schemas.xmlsoap.org/soap/envelope/' as "soap",
    'http://schemas.xmlsoap.org/soap/encoding/' as "soapenc"
  ),
  '/soap:Envelope/soap:Body/getDhcpForPortResponse/soapenc:Array/item/item'
  passing XMLType('<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
            <getDhcpForPortResponse
                xmlns="urn:DHCPProv">
                <soapenc:Array
                    soapenc:arrayType="soapenc:Array[2]"
                    xsi:type="soapenc:Array">
                    <item
                        soapenc:arrayType="xsd:string[5]"
                        xsi:type="soapenc:Array">
                        <item
                            xsi:type="xsd:string">
                            qbtp8482tv
                            </item>
                        <item
                            xsi:type="xsd:string">
                            111.11.111.111
                            </item>
                        <item
                            xsi:type="xsd:string">
                            bc644ba2501c
                            </item>
                        <item
                            xsi:type="xsd:string">
                            MF5601T_AMD-NDF
                            </item>
                        <item
                            xsi:type="xsd:string"/>
                        </item>
                    <item
                        soapenc:arrayType="xsd:string[5]"
                        xsi:type="soapenc:Array">
                        <item
                            xsi:type="xsd:string">
                            qbtp8482tv
                            </item>
                        <item
                            xsi:type="xsd:string">
                            222.22.222.222
                            </item>
                        <item
                            xsi:type="xsd:string">
                            704fb8f3e4e1
                            </item>
                        <item
                            xsi:type="xsd:string">
                            MF5601T_AMD-NDF
                            </item>
                        <item
                            xsi:type="xsd:string"/>
                        </item>
                    </soapenc:Array>
                </getDhcpForPortResponse>
 </soap:Body>
 </soap:Envelope>')
  columns item varchar2(4000) path '.'
)

ITEM
qbtp8482tv
111.11.111.111
bc644ba2501c
MF5601T_AMD-NDF
null
qbtp8482tv
222.22.222.222
704fb8f3e4e1
MF5601T_AMD-NDF
null