DNS, TCPIP & OSI Model Quiz

What is the first step in the DNS lookup process when a user enters a URL in the web browser?

• The browser checks its own cache for the IP address.

• The browser sends a request to the ISP's DNS server.

• The browser queries the authoritative DNS server.

• The browser directly contacts the web server.

What does the acronym TTL stand for in the context of DNS lookup?

• Time to Live

• Total Time Limit

• Transfer to Location

• Time to Lookup

Which DNS server is responsible for knowing the actual IP address of the domain name?

• Authoritative DNS server

• Root DNS server

• ISP DNS server

• LAN Router Cache

What is the purpose of the DNS resolver in the DNS lookup process?

• To perform a recursive search through the DNS network.

• To directly contact the web server.

• To store the IP address for future requests.

• To manage the browser's cache.

What happens if the ISP's DNS server does not have the IP address in its cache?

• It performs a recursive search through the DNS network.

• It sends a request to the LAN router.

• It directly contacts the web server.

• It returns an error to the client.

What is the final step in the DNS lookup process before the browser makes the HTTP/HTTPS request?

• The browser stores the IP address in its cache.

• The browser checks the operating system's cache.

• The browser sends a request to the ISP's DNS server.

• The browser queries the root DNS server.

What is the purpose of the TCP three-way handshake in establishing a connection?

• To close the connection between the client and server

• To ensure both the client and server are ready for data transmission

• To send data packets directly to the server

• To disconnect the client from the server

Which of the following is the correct order of steps in the TCP three-way handshake?

• SYN, ACK, SYN-ACK

• SYN-ACK, SYN, ACK

• SYN, SYN-ACK, ACK

• ACK, SYN, SYN-ACK

What does the HTTP request method usually retrieve?

• HTML files

• CSS files

• Information

• JavaScript files

What is indicated by a status code of 200 in an HTTP response?

• The request was not found

• The request was successful

• The server is down

• The connection was closed