APPLICATION LAYER

In the TCP/IP protocol stack, what does the Network Layer primarily include?

• TCP/UDP Ports

• IP Addresses

• MAC Addresses

• Bits

What type of data and headers are included at the Transport Layer in the TCP/IP model?

• Bits

• Frames

• Segments

• Packets

Which device is responsible for forwarding data at the Data Link Layer?

• Routers

• Hubs

• Switches

• Firewalls

What is the primary function of the Domain Name System (DNS)?

• To encrypt network traffic.

• To translate domain names into IP addresses.

• To manage physical network connections.

• To assign dynamic IP addresses to devices.

Which transport layer protocol does DNS primarily use?

• TCP

• HTTP

• UDP

• FTP

What is the primary purpose of a well-known port in network communication?

• To encrypt data for secure transmission.

• To identify the specific application layer service being requested on a server.

• To determine the physical path data takes across the network.

• To assign a unique identifier to each network device.

What is the well-known destination port number for DNS requests?

• 21

• 80

• 53

• 443

How does a computer typically choose a source UDP port for an outgoing request?

• It always uses a fixed port number like 80.

• It randomly selects a port number from a predefined list.

• It chooses an unused port number greater than 1024.

• It uses the same port number as the destination port.

Which transport layer protocol and well-known destination port are used by the Domain Name Service (DNS)?

• TCP, port 80

• UDP, port 53

• TCP, port 23

• UDP, port 21

At which layer of the OSI model do routers primarily operate?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer