Which of the following is a nearly universal method of name resolution on the Internet?
A.
ARP
B.
UDP
C.
POP
D.
DNS
Explanation:
DNS (Domain Name Server) is a server implementation of the static HOSTS file implementation.
Originally, to set a IP address to Host Name mapping, the HOSTS file was used, which was a flat
text file. Implementation of DNS provided a central server method of performing the functions of
the HOSTS file with minimal maintenance and high performance.
Incorrect Answers:
A: ARP (Address Resolution Protocol) is used to determine the hardware address of a node for
specific IP address. A packet with the IP address is sent and the appropriate client should return
an ARP Reply with the MAC address that goes with the requested IP address. This is MAC
address resolution, not name resolution.
B: UDP (User Datagram Protocol) is a transport layer protocol, which is used for connectionless
data transfer.
C: POP (Post Office Protocol) is a Application Level protocol used by client to retrieve e-mail off email server.