Imagine you want to visit a friend's house. Instead of remembering their exact address, you remember their nickname. In web hosting, what does the domain name act like?
Think about how you find a website without typing numbers.
A domain name is like a nickname or label that helps people find a website without remembering its numeric IP address.
Follow the steps below to understand how a domain name is converted to an IP address. Which step happens third?
- User types domain name in browser.
- Browser asks local DNS server for IP.
- Local DNS server checks cache.
- If not found, local DNS asks root DNS server.
- Root DNS points to TLD DNS server.
Think about what the local DNS server does before asking others.
After the browser asks the local DNS server, the server first checks its cache before querying other servers.
Which statement correctly compares shared hosting and dedicated hosting?
Think about how many websites use the same server in each type.
Shared hosting means many websites share one server, which is cheaper but slower. Dedicated hosting means one website has the whole server, offering better performance.
Which of the following domain names is invalid?
Domain names cannot start with certain characters.
Domain names cannot start with a hyphen (-). Option A starts with a hyphen, making it invalid.
Assuming a domain name can only use lowercase letters (a-z) and digits (0-9), and must be exactly 3 characters long, how many unique domain names are possible?
Count how many characters are allowed and raise to the power of length.
There are 26 letters + 10 digits = 36 characters. For 3 characters, total = 36³ = 46656.