Network+ OSI Model Layers and Functions 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+ OSI Model Layers and Functions flashcards as text
A hub receives a signal on one port and immediately broadcasts it out all other ports. At which OSI layer does a hub operate?
Answer: Layer 1
Hubs operate at Layer 1 (Physical layer) and simply repeat electrical signals to all ports without any intelligence.
Which layer of the OSI model is responsible for logical addressing and path determination?
Answer: Network layer
The Network layer (Layer 3) handles logical IP addressing and determines the best path for packet delivery across networks.
SSL/TLS encryption is commonly associated with which OSI layer?
Answer: Presentation layer
SSL/TLS operates at the Presentation layer (Layer 6), handling encryption and decryption of data for secure communications.
Which OSI layer PDU is called a 'packet'?
Answer: Network layer
The Network layer's PDU is called a packet, which contains source and destination IP addresses.
A network administrator is configuring a device that connects two different network segments and uses MAC addresses to filter traffic. Which device is this?
Answer: Bridge
A bridge operates at Layer 2 (Data Link layer) and uses MAC addresses to filter and forward traffic between network segments.
Which of the following correctly lists the OSI layers from Layer 7 down to Layer 1?
Answer: Application, Presentation, Session, Transport, Network, Data Link, Physical
The correct order from Layer 7 to Layer 1 is: Application, Presentation, Session, Transport, Network, Data Link, Physical.
When a receiving host processes an incoming frame, it removes headers and trailers as data moves up the OSI stack. What is this process called?
Answer: Decapsulation
Decapsulation is the process where each OSI layer strips its corresponding header and trailer as data moves up toward the Application layer.