CSCI 291 Quiz 2a

RJ-45

A connector used for Ethernet networking (LAN, WAN) that connects routers, computers, and switches.

UTP (Unshielded Twisted Pair)

A cable type used for LAN connections, characterized by twisted copper wires to minimize EMI, being less expensive, and flexible.

Hub

A network device that connects multiple devices on a LAN and broadcasts data to all ports, potentially causing data collisions.

Switch

A network device that connects multiple devices on a LAN and sends data only to the intended recipient, reducing collisions.

Wi-Fi

A technology used for wireless internet access that operates on 2.4 GHz and 5 GHz frequencies.

Bluetooth

A technology for short-range wireless communication between devices, typically operating on 2.4 GHz frequency.

FTP (File Transfer Protocol)

A protocol used for transferring files between a client and server, operating on port 21.

Public IP Address

An IP address visible on the internet, assigned by ISPs, used for identifying devices across the internet.

Packet

A small segment of data sent over a network that contains a header, payload, and trailer.

VPN (Virtual Private Network)

A service that encrypts internet traffic and masks the user's IP address, used for secure remote access.

OSI Model

A conceptual framework used to understand network communications in seven layers, from physical transmission to application services.

nslookup

A command used to query DNS to resolve domain names into IP addresses.

Ethernet Cable

A type of cable used for high-speed LAN connections, with variations such as Cat 5e, Cat 6, and Cat 7.

Coaxial Cable

A type of cable used for cable TV and some internet connections, providing higher bandwidth than UTP.

ZigBee

A wireless technology used for smart home automation that operates on low-energy radio frequencies and forms mesh networks.

SMTP (Simple Mail Transfer Protocol)

A protocol used for sending emails, operating over port 25.

Firewall

A security device that monitors and controls incoming and outgoing network traffic to protect against unauthorized access.