Which layer of the OSI model includes the TCP and UDP protocols?
A) Application
B) Presentation
C) Session
D) Transport
E) Network
F) Data link
G) Physical
D
Explanation: D) TCP and UDP are transport protocols, introduced at the transport layer of OSI (and TCP/IP).
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_____ is the activity of building information systems to meet users' needs.
Fill in the blank(s) with the appropriate word(s).
Answer the following statements true (T) or false (F)
1) The security of modern cryptosystems lies in the secrecy of the algorithm. 2) Increasing the security of a network often decreases its functionality and efficiency. 3) Firewalls are the single most effective way to add security to a small computer network. 4) Kerberos is an authentication protocol that is used over TCP/IP networks. 5) SSL can connect a network of computers over the Internet.
The custom number formatting code 0 is a digit placeholder, which is always displayed, so if the cell number format is 000 and the number 17 is entered, the worksheet will display 017
A. True B. False
How are comments by various reviewers differentiated?
A) By color B) By shape C) By numbers D) By Roman numerals