按系统和外界的关系分类可以将系统分为哪两种？
What is the relationship between the Domain Name System （DNS） and LDAP？（） ["All the root DNS servers maintain information in a distributed LDAP tree.","DNS clients access DNS information by making LDAP queries to DNS servers.","An LDAP DN attribute is a Domain Name.","It is currently recommended to express DN as a sequence of Domain components."]
不对称膜
Which two of the following are considered valid router IDs for EIGRPv6？ （） ["0.0.0.1","0.255.0.1","2001：DB8：：1","2001：DB8：ABCD：FEEF：：1"]
下列既可以做OLT又可以做MDU的是（） ["MA5680T","MA5606T","MA562X","MA561X"]
1958年教堂山会议，韦勒克的《比较文学的危机》（记作者和书名）对对法国学派进行怎样的批评？
