Which of the following servers provide remote access though a dial-up connection?

A.
A RAS server.

B.
A NAS server.

C.
A, DHCP server.

D.
A WINS server.

Explanation:
A Remote Access Service (RAS) server allows remote clients to access a LAN though a dial-up connection and allows the remote clients to access files and services on the LAN.
Incorrect
Answers:
B: A Network-Attached Storage (NAS) server provides file storage directly on the transport network.
C: A, Dynamic Host Configuration Protocol (DHCP) server provides dynamic IP configuration to DHCP clients.
D: A Windows Internet Naming Service (WINS) server is a Microsoft NetBIOS name server that resolves a NetBIOS names to IP address, allowing clients to access network resources by computer name rather than by IP address.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 18-25.