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Computer Networks Basics
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IPv6
The most recent version of Internet Protocol that uses 128-bit addresses to accommodate more devices on the internet.
VPN
A virtual private network extends a private network across a public network, allowing users to send and receive data as if their devices were directly connected to the private network.
IPv4
The fourth version of the Internet Protocol, which uses 32-bit addresses to identify devices on a network.
FTP
File Transfer Protocol used to transfer computer files between a client and server on a computer network.
Switch
A network device that filters and forwards packets between LAN segments.
DNS
The Domain Name System is a hierarchical and decentralized naming system for computers, services, or other resources connected to the internet or a private network.
OSI Model
A conceptual framework used to understand network interactions in seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.
TCP/IP
A set of communication protocols used for the interconnection of network devices on the internet.
Router
A networking device that forwards data packets between computer networks, creating an overlay internetwork.
HTTP
Hypertext Transfer Protocol, an application protocol for distributed, collaborative, hypermedia information systems.
HTTPS
A secure version of HTTP, which encrypts data for secure communication over a computer network.
MAC Address
A unique identifier assigned to a network interface controller for use as a network address in communications within a network segment.
Subnetting
The process of dividing a network into two or more networks, often used to improve performance or provide security.
SSID
Service Set Identifier, a unique ID that consists of 32 characters and is used for naming wireless networks.
PING
Packet Internet Groper, a diagnostic tool to test the reachability of a host on an Internet Protocol network.
LAN
Local Area Network, a computer network that interconnects devices within a limited area such as a residence, school, or office building.
WAN
Wide Area Network, a telecommunications network that extends over a large geographical area for the primary purpose of computer networking.
NAT
Network Address Translation, a method of remapping one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device.
Firewall
A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Packet
A formatted unit of data carried by a packet-switched network.
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