CompTIA Network+ Network+ Networking Fundamentals 2

Question 1

Which layer of the OSI model is responsible for logical addressing and routing packets between networks?

Accepted Answer

Network

Answer

The Network layer (Layer 3) handles logical addressing (IP) and routing packets across different networks.

Question 2

A device receives a frame but the destination MAC address does not match its own and it is not a broadcast. What does a switch do with this frame?

Accepted Answer

Forwards it out the correct port based on its MAC table

Answer

A switch uses its MAC address table to forward unicast frames out the specific port associated with the destination MAC.

Question 3

Which protocol operates at Layer 4 and provides connection-oriented, reliable data delivery?

Accepted Answer

TCP

Answer

TCP (Transmission Control Protocol) establishes a connection via a three-way handshake and guarantees reliable, ordered delivery.

Question 4

What is the purpose of a default gateway on a host?

Accepted Answer

Forward traffic destined for remote networks

Answer

The default gateway is the router interface a host uses to send packets to destinations outside its local subnet.

Question 5

Which networking device operates at Layer 2 and uses MAC addresses to forward frames only to the appropriate port?

Accepted Answer

Switch

Answer

A switch operates at the Data Link layer and makes forwarding decisions based on destination MAC addresses.

CompTIA Practice Test