May 2024
Intermediate to advanced
309 pages
13h 33m
English
Content preview from Data Communications and Computer Networks by Pearson
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Application Layer Protocols 251
2. What is a domain name system?
Ans: The TCP/IP protocol identifies entities that are connected on the Internet using their unique IP
addresses. These addresses being numeric are difcult to remember for the users as compared to their
names, therefore, a system was needed that can change a name to an address and vice versa. Domain
name system (DNS) is such a system that is used to map the user friendly host names to their IP addresses
and vice versa. This system is used extensively over the Internet and other private businesses.
3. What is a resolver? What is its role in DNS?
Ans: A resolver is a ...
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