Which of the following is a service discovery protocol that allows computers and other devices to
find services in a local area network without prior configuration?

A.
NTP

B.
SLP

C.
NNTP

D.
DCAP

Explanation:

The Service Location Protocol (SLP, srvloc) is a service discovery protocol that allows computers
and other devices to find services in a local area network without prior configuration. SLP has
been designed to scale from small, unmanaged networks to large enterprise networks.
Answer option C is incorrect. The Network News Transfer Protocol (NNTP) is an Internet
application protocol used for transporting Usenet news articles (netnews) between news servers
and for reading and posting articles by end user client applications. NNTP is designed so that
news articles are stored in a central database, allowing the subscriber to select only those items
that he wants to read. Answer option A is incorrect. Network Time Protocol (NTP) is used to
synchronize the timekeeping among the number of distributed time servers and clients. It is used
for the time management in a large and diverse network that contains many interfaces. In this
protocol, servers define the time, and clients have to be synchronized with the defined time. These
clients can choose the most reliable source of time defined from the several NTP servers for their
information transmission.
Answer option D is incorrect. The Data Link Switching Client Access Protocol (DCAP) is an
application layer protocol that is used between workstations and routers for transporting

SNA/NetBIOS traffic over TCP sessions. It was introduced in order to address a few deficiencies
by the Data Link Switching Protocol (DLSw). The DLSw raises the important issues of scalability
and efficiency, and since DLSw is a switch-to-switch protocol, it is not efficient when implemented
on workstations. DCAP was introduced in order to address these issues.