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

Data Link

Answer

Transport

Answer

Session

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

Drops the frame immediately

Answer

Sends it to the default gateway

Answer

Broadcasts it to all ports

Question 3

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

Accepted Answer

TCP

Answer

UDP

Answer

ICMP

Answer

ARP

Question 4

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

Accepted Answer

Forward traffic destined for remote networks

Answer

Resolve hostnames to IP addresses

Answer

Assign IP addresses dynamically

Answer

Filter incoming packets by port number

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

Router

Answer

Hub

Answer

Repeater

Question 6

What does the acronym CSMA/CD stand for and which network type uses it?

Accepted Answer

Carrier Sense Multiple Access/Collision Detection — used in traditional wired Ethernet

Answer

Channel Switching Multiple Access/Collision Detection — used in Wi-Fi

Answer

Carrier Sense Media Access/Circuit Detection — used in fiber optics

Answer

Circuit Switched Multiple Access/Collision Delay — used in token ring

Question 7

Which class of IPv4 address uses a default subnet mask of 255.255.0.0?

Accepted Answer

Class B

Answer

Class A

Answer

Class C

Answer

Class D