Term 691
Web Application Firewall
A Web Application Firewall (WAF) is a security tool that monitors, filters, and blocks HTTP traffic to and from a web application to protect it from common attacks.
Acronym study
Terms 691–716 of 716 CCNA acronyms and key terms. Each entry includes a plain-English definition and a link to the full 800-word glossary page with exam context and practice questions.
Term 691
A Web Application Firewall (WAF) is a security tool that monitors, filters, and blocks HTTP traffic to and from a web application to protect it from common attacks.
Term 692
Weighted routing is a traffic management technique that distributes network requests across multiple servers or paths according to assigned numerical weights, allowing for controlled, uneven load distribution.
Term 693
wget is a free command-line tool for downloading files from the internet using protocols like HTTP, HTTPS, and FTP.
Term 694
Wi-Fi is a technology that lets devices like laptops and phones connect to the internet or communicate with each other wirelessly using radio waves.
Term 695
Wi-Fi Protected Access (WPA) is a security standard designed to secure wireless networks by encrypting data and controlling access, replacing the older and less secure WEP standard.
Term 696
A network security feature designed to simplify the process of connecting devices to a Wi-Fi network by using a push button or PIN instead of entering the full password.
Term 697
A Wide Area Network (WAN) is a telecommunications network that connects computers and devices across large geographical distances, such as between cities or countries.
Term 698
A wildcard mask is a sequence of 32 bits used alongside an IP address to define which bits must match and which are ignored for routing, access control, or network matching purposes.
Term 699
Windows Defender Firewall is a built-in security feature in Microsoft Windows that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Term 700
A Windows Update failure occurs when the operating system cannot download, install, or configure updates from Microsoft servers successfully.
Term 701
Wired Equivalent Privacy (WEP) is a security protocol for wireless networks, designed to provide a level of data confidentiality comparable to a wired LAN.
Term 702
A set of rules that allows mobile devices to connect to the internet over a wireless network, primarily used in older mobile phone systems to access web content.
Term 703
A Wireless Internet Service Provider (WISP) delivers internet access to customers using radio signals instead of physical cables like fiber or DSL.
Term 704
A Wireless LAN (WLAN) is a network that connects devices like laptops and phones to each other and the internet using radio waves instead of physical cables.
Term 705
A wireless network that connects devices over a large geographic area using cellular or satellite technology, like the internet on your phone without cables.
Term 706
Wireshark is a free, open-source network protocol analyzer that captures and inspects data packets traveling over a computer network in real time.
Term 707
A wireless local area network (WLAN) links devices using radio waves instead of cables, typically based on IEEE 802.11 standards.
Term 708
A Wireless LAN Controller is a centralized device that manages, configures, and secures multiple wireless access points in a network.
Term 709
WPA2 is a security protocol used to protect Wi-Fi networks by encrypting data transmitted between devices and the access point.
Term 710
WPA2 cracking is the process of exploiting weaknesses in the WPA2 wireless security protocol to recover the network password and gain unauthorized access to a Wi-Fi network.
Term 711
WPA3 is the latest security standard for Wi-Fi networks, providing stronger encryption and protection against password guessing attacks compared to its predecessor WPA2.
Term 712
A WPS attack exploits vulnerabilities in the Wi-Fi Protected Setup (WPS) protocol, especially the PIN authentication method, to gain unauthorized access to a wireless network.
Term 713
xargs is a command-line utility that reads input from standard input and converts it into arguments for another command.
Term 714
XML is a flexible text format used to store and transport data in a way that both humans and computers can read, using custom tags to describe the data's structure.
Term 715
YANG is a data modeling language used to define the structure and constraints of data exchanged between network devices and management applications.
Term 716
Zero Trust is a security framework that assumes no user, device, or network is automatically trusted, requiring verification for every access request regardless of its origin.