The Domain Name System (DNS) serves a critical role in internet navigation. Its main function is to translate human-readable domain names, such as $www.example.com$, into the numerical IP addresses (like $192.0.2.1$) that computers use to identify each other on networks.
This process is essential because users find it easier to remember names rather than strings of numbers. When you type a domain name into your browser, DNS queries are sent out to servers that resolve this name into the corresponding IP address, enabling your computer to connect to the correct web server.
Therefore, the primary use of DNS is mapping domain names to IP addresses.
The differential equation $\frac{d^2y}{dx^2} + \frac{dy}{dx} + \sin y = 0$$ is:
Match List - I with List - II.
| List - I (Laws) | List - II (Applications) |
|---|---|
| A. Ampere's law | I. Force on a charge |
| B. Biot's law | II. Force due to a current carrying conductor |
| C. Coulomb's law | III. Electric flux density at a point |
| D. Gauss's law | IV. Magnetic flux density at a point |
The pointing vector $P = E \times H$ represents: