Which of the following provides authentication, encryption and data integrity for wireless devices?

A.
WAN

B.
WAP

C.
PAP

D.
WTLS

Explanation:

WTLS provides authentication, encryption and data integrity for wireless devices.
Wireless Transport Layer Security (WTLS) is a security layer of WAP, which is specifically designed for
a wireless environment. It provides
privacy, data integrity, and authentication for client-server communications over a wireless network.
WTLS ensures that a client and server
are authenticated so that wireless transactions remain secure and the connection is encrypted.
WTLS is required because a wireless network
does not provide end-to-end security.
Answer A is incorrect. Wide Area Network (WAN) represents a network spanned in a large
geographic area. WANs connect two or more
LANs separated by a large distance. To connect LANs in a WAN network, carrier networks such as
telephone companies provide the services.
The basic types of connections or circuits WAN services use are circuit-switched, cell-switched,
packet-switched, and dedicated connections.
Answer C is incorrect. Password Authentication Protocol (PAP) is the least sophisticated
authentication protocol, used mostly when a
client calls a server running an operating system other than Windows. PAP uses plain text
passwords.
Answer B is incorrect. The Wireless Access Protocol (WAP) is a technology used with wireless
devices. The functionality of WAP is
equivalent to that of TCP/IP. WAP uses a smaller version of HTML called Wireless Markup Language
(WML) to display Internet sites.