Network + Week 1
📲 Week 1 – Networking Basics Flashcards
Q: What is a network?
A: Two or more devices connected to share resources.
Q: LAN stands for?
A: Local Area Network (small, like home or office).
Q: WAN stands for?
A: Wide Area Network (large, like the Internet).
Q: MAN stands for?
A: Metropolitan Area Network (city-wide).
Q: Client–Server vs Peer-to-Peer?
A: Client–Server = centralized server; P2P = devices talk directly.
Q: What does a switch do?
A: Connects devices in a LAN, forwards traffic only where needed.
Q: What does a hub do?
A: Sends data to all devices (inefficient, insecure).
Q: What does a router do?
A: Connects different networks (LAN to WAN/Internet).
Q: What does a firewall do?
A: Filters traffic, blocks or allows based on rules.
Q: What does an access point do?
A: Provides Wi-Fi connectivity.
Q: Which is more secure: switch or hub?
A: Switch.
Q: Cat5e, Cat6, Cat6a are what type of cables?
A: Twisted pair Ethernet cables.
Q: Which cable is immune to interference?
A: Fiber optic.
Q: Bandwidth = ?
A: Maximum capacity of data transfer.
Q: Latency = ?
A: Delay before data transfer starts.
Q: Throughput = ?
A: Actual data transfer rate (real-world performance).
Q: In simple terms: Hub, Switch, Router?
A: Hub = Dumb, Switch = Smart, Router = Boss.
1⃣
Physical
(Layer 1)
Cables, signals, bits (1s and 0s).
Example: Ethernet cable, fiber optic, radio waves.
2⃣
Data Link
(Layer 2)
MAC addresses (hardware addresses), switches.
Makes sure data gets to the right device on the same network.
3⃣
Network
(Layer 3)
IP addresses, routers.
Decides where the packet goes (which network).
4⃣
Transport
(Layer 4)
Ensures reliable delivery (TCP/UDP).
Breaks data into segments, checks if everything arrived.
5⃣
Session
(Layer 5)
Manages sessions (like logging into a website and keeping you connected).
6⃣
Presentation
(Layer 6)
Translates data formats (encryption, compression, file formats).
7⃣
Application
(Layer 7)
What the user actually interacts with.
Examples: Web browsers, email, Zoom.