Leonardo da Vinci was a very famous painter. I would assume that he is an expert in painting.
Hope this helped
Spam Messages
Explanation:
These are messages that contain malicious codes that are usually intended to send messages to the email user's email list without his permission.
Some are easily recognized with their subject but some come in the form of useful messages.
Answer:
The overall speedup gained by incorporating the enhancement is 1.563
Explanation:
Using Amdahl's Law;
The overall speedup 
where;
P = Fraction Enhanced for Old Processor
n = speedup enhancement as a result of the new processor
P = 40% = 0.40 and n = 10
∴
The overall speedup (N) is:
= 1.563
Thus, the overall speedup gained by incorporating the enhancement is 1.563
Complete Question:
LDAP is an industry standard employed by Microsoft, which enables IT departments to use a(n) __________ structure when creating user accounts and user groups.
(a)directory tree
(b)Organizational Unit (OU)
(c)forest
(d)file system
Answer:
(a) directory tree structure
Explanation:
Lightweight Directory Access Protocol (LDAP) is a special type of Directory Access Protocol (DAP) and it is a software protocol that allows the storage and retrieval of data objects (such as user accounts and user groups) that are arranged in an hierarchical directory structure. This hierarchical directory structure is called directory tree or directory information tree.
LDAP stores users and resources information of an organization. These information include usernames, passwords, email, human resource data e.t.c
