NSS Revision Questions (Set 1)

Which network device operates at Layer 2 (Data Link) of the OSI model and uses MAC addresses to forward frames?

• Router

• Switch

• Hub

• Firewall

What protocol is responsible for translating domain names into IP addresses?

• ICMP

• TCP

• UDP

• DNS

Which layer of the OSI model is responsible for logical addressing using IP addresses?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer

What is the purpose of DHCP (Dynamic Host Configuration Protocol) in networking?

• Assigning static IP addresses to devices

• Resolving domain names to IP addresses

• Automatically assigning IP addresses to devices on a network

• Providing encryption for network traffic

What is the default subnet mask for an IPv4 address in a Class C network?

• 255.0.0.0

• 255.255.0.0

• 255.255.255.0

• 255.255.255.255

Which protocol provides reliable, connection-oriented communication in the transport layer of the OSI model?

• TCP

• UDP

• HTTP

• ICMP

What is the purpose of ARP (Address Resolution Protocol) in networking?

• Assigning IP addresses to devices

• Converting domain names to IP addresses

• Resolving MAC addresses from IP addresses

• Ensuring secure data transmission

In networking, what does the term "subnetting" refer to?

• Dividing a network into smaller segments for better performance

• Encrypting data for secure transmission

• Establishing a connection between two distant networks

• Assigning unique MAC addresses to devices

Which network topology connects each device to a central hub or switch?

• Star

• Ring

• Bus

• Mesh

What is the default port number for HTTP (Hypertext Transfer Protocol) traffic?

• 21

• 53

• 80

• 443