All of the following are true of NIS+ except:
A.
Does not support MD5 password encryption
B.
Uses SecureRPC
C.
Hierarchical in nature
D.
Supports object access restrictions
Explanation:
Network Information Systems (NIS) is a distributed database system that
lets computers share sets of files. NIS+ offers additional functionality expanding
upon regular NIS. It does support MD5 password encryption.
Correct answer is A
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NIS and NIS + (originally called Yellow Pages) are directory services (but not database) developed by Sun Microsystems, which are mostly used in UNIX environments.
NIS +uses a hierarchical namespace. It is based on Secure RPC (see Remote Procedure Calls).
NIS+ is designed to operate in three security levels.
In level 0, the NIS+ server (rpc.nisd) performs no authentication to determine the legitimacy of incoming requests.
In level l, RPC AUTH_UNIX (client-presented UIDs and GIDs) are used to authenticate requests.
In level 2, the most secure level, AUTH_DES is used to cryptographically authenticate incoming requests. Unfortunately, even when the system is operating in security level 2, which should mandate cryptographic authentication for all requests.
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