Network+ Networking Fundamentals Flashcards
7 cards from real COMPTIA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Network+ Networking Fundamentals flashcards as text
Which layer of the OSI model is responsible for logical addressing and routing packets between networks?
Answer: Network
The Network layer (Layer 3) handles logical addressing (IP) and routing packets across different networks.
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?
Answer: Forwards it out the correct port based on its MAC table
A switch uses its MAC address table to forward unicast frames out the specific port associated with the destination MAC.
Which protocol operates at Layer 4 and provides connection-oriented, reliable data delivery?
Answer: TCP
TCP (Transmission Control Protocol) establishes a connection via a three-way handshake and guarantees reliable, ordered delivery.
What is the purpose of a default gateway on a host?
Answer: Forward traffic destined for remote networks
The default gateway is the router interface a host uses to send packets to destinations outside its local subnet.
Which networking device operates at Layer 2 and uses MAC addresses to forward frames only to the appropriate port?
Answer: Switch
A switch operates at the Data Link layer and makes forwarding decisions based on destination MAC addresses.
What does the acronym CSMA/CD stand for and which network type uses it?
Answer: Carrier Sense Multiple Access/Collision Detection — used in traditional wired Ethernet
CSMA/CD (Carrier Sense Multiple Access/Collision Detection) is the access method used by traditional half-duplex Ethernet to detect and handle collisions.
Which class of IPv4 address uses a default subnet mask of 255.255.0.0?
Answer: Class B
Class B addresses (128.0.0.0–191.255.255.255) have a default subnet mask of 255.255.0.0 (/16).