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Which of the following authentication services is being…

A system administrator is configuring UNIX accounts to authenticate against an external server. The
configuration file asks for the following information DC=ServerName and DC=COM. Which of the following
authentication services is being used?

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The Lightweight Directory Access Protocol is an open, vendor-neutral, industry standard application protocol for
accessing and maintaining distributed directory information services over an Internet Protocol (IP) network.
Directory services play an important role in developing intranet and Internet applications by allowing the sharing
of information about users, systems, networks, services, and applications throughout the network. As
examples, directory services may provide any organized set of records, often with a hierarchical structure, such
as a corporate email directory. Similarly, a telephone directory is a list of subscribers with an address and a
phone number.
An entry can look like this when represented in LDAP Data Interchange Format (LDIF) (LDAP itself is a binary
dn: cn=John Doe,dc=example,dc=com
cn: John Doe
givenName: John
sn: Doe
telephoneNumber: +1 888 555 6789
telephoneNumber: +1 888 555 1232
manager: cn=Barbara Doe,dc=example,dc=com
objectClass: inetOrgPerson
objectClass: organizationalPerson
objectClass: person
objectClass: top
“dn” is the distinguished name of the entry; it is neither an attribute nor a part of the entry. “cn=John Doe” is the
entry’s RDN (Relative Distinguished Name), and “dc=example,dc=com” is the DN of the parent entry, where
“dc” denotes ‘Domain Component’. The other lines show the attributes in the entry. Attribute names are typically
mnemonic strings, like “cn” for common name, “dc” for domain component, “mail” for e-mail address, and “sn”
for surname.

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