Networking Basics Flashcards
(18 cards)
What is a device that connects all devices within a LAN and allows them to communicate?
Switch
A switch connects multiple devices within a LAN.
What does WAN stand for?
Wide Area Network
A WAN covers a broad area, such as the internet.
What is the role of a router?
Connects LAN with WAN
A router directs data between a local network and the internet.
True or False: A WAN is a local area network.
False
A WAN covers a larger geographical area compared to a LAN.
Fill in the blank: A _______ connects a LAN with a WAN.
Router
What does NAT stand for?
NAT stands for Network Address Translation.
What does DMZ stand for?
DMZ stands for Demilitarized Zone.
What is a firewall and what is it’s purpose?
A firewall is a set of passive rules that protects a LAN from unauthorized access.
What does LAN stand for, and what is it?
Local Area Network – a collection of connected devices within a small area, like a home or school.
What is a WAN?
Wide Area Network – a network that spans large distances, like the internet.
What is an IP address?
A device’s unique identifier on a network, like a personal address.
What does a switch do?
It connects LAN devices and lets them communicate with each other. (Analogy: hall monitor)
What does every device usually need to communicate?
An IP address, subnet, and a gateway (usually the router’s IP).
What are the four core functions of a router?
NAT, DMZ, firewall, and port forwarding.
What does NAT do?
Network Address Translation changes internal IP addresses to a public one to protect them from WAN exposure.
What is a DMZ?
A network area exposed to the internet but separated from the LAN. It allows limited external access to certain devices/services.
What is port forwarding?
It assigns a specific port (like a door) to a device, allowing external access by bypassing the firewall and DMZ.
When might you use DMZ or port forwarding?
To allow external access to a device – DMZ for general exposure, port forwarding for specific services.
