Term 661
VLAN
A VLAN (Virtual Local Area Network) is a logical grouping of network devices that behave as if they are on the same physical network segment, regardless of their actual physical location.
Acronym study
Terms 661–690 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 661
A VLAN (Virtual Local Area Network) is a logical grouping of network devices that behave as if they are on the same physical network segment, regardless of their actual physical location.
Term 662
A VLAN logically segments a physical network into isolated broadcast domains without requiring separate physical switches.
Term 663
A VLAN mismatch occurs when two connected network devices are configured with different VLAN assignments on the same link, causing traffic to be dropped or misrouted.
Term 664
VLAN tagging is a method used to identify which VLAN a network frame belongs to as it travels across a trunk link, allowing multiple VLANs to share the same physical connection without mixing their traffic.
Term 665
Variable Length Subnet Masking (VLSM) is a technique that allows network engineers to create subnets of different sizes within the same network, using custom subnet masks to match the exact number of hosts needed.
Term 666
A virtual private network inside a cloud provider that lets you securely connect and isolate your cloud resources.
Term 667
VNet peering is a networking connection that links two virtual networks so they can communicate with each other as if they were a single network.
Term 668
Voice over IP (VoIP) is a technology that lets you make phone calls using an internet connection instead of a traditional telephone line.
Term 669
A Voice VLAN is a separate virtual local area network configured on a network switch to carry voice traffic, such as from IP phones, ensuring quality of service and security by isolating it from data traffic.
Term 670
VoIP (Voice over IP) is a technology that transmits voice calls as digital data packets over IP networks instead of traditional circuit-switched telephone lines.
Term 671
A Virtual Private Cloud (VPC) is a logically isolated section of a cloud provider's network where you can launch and manage resources like servers and databases with complete control over IP addressing, subnets, route tables, and security.
Term 672
A VPC endpoint is a private connection that allows resources inside a Virtual Private Cloud to access supported AWS services or external networks without going over the public internet.
Term 673
A feature that captures information about the IP traffic going to and from network interfaces in a Virtual Private Cloud (VPC).
Term 674
A Virtual Private Cloud (VPC) network is a logically isolated section of a public cloud provider's infrastructure where you can launch cloud resources in a virtual network that you define and control.
Term 675
VPC peering is a direct network connection between two virtual private clouds that allows them to communicate using private IP addresses as if they were part of the same network.
Term 676
VPC Service Controls is a Google Cloud security feature that protects the data of managed services by defining perimeters that prevent data exfiltration and unauthorized access across public networks.
Term 677
A VPN (Virtual Private Network) creates a secure, encrypted tunnel between your device and a remote server, protecting your data and hiding your online activity.
Term 678
A VPN creates an encrypted tunnel over a public network to securely connect remote users or sites to a private network.
Term 679
A VPN concentrator is a network device that manages, encrypts, and routes multiple VPN connections from remote users or sites into a single secure gateway.
Term 680
A VPN connection creates a secure, encrypted tunnel between a device and a remote network over the public internet, protecting data from eavesdropping.
Term 681
A VPN Gateway is a network device or service that creates an encrypted tunnel between two or more networks over the internet, allowing secure communication.
Term 682
VRF (Virtual Routing and Forwarding) allows a single router to maintain multiple separate routing tables, enabling network segmentation without additional hardware.
Term 683
VRRP (Virtual Router Redundancy Protocol) is a network protocol that automatically assigns a virtual IP address to a group of routers to ensure that if one router fails, another can take over seamlessly, keeping devices on the network connected.
Term 684
VRRP is an open standard protocol that provides default gateway redundancy by allowing multiple routers to share a virtual IP address.
Term 685
VTP is a Cisco proprietary protocol that advertises VLAN configuration information across a network to keep VLAN databases consistent among switches.
Term 686
VTP (VLAN Trunk Protocol) is a Cisco proprietary protocol that manages the addition, deletion, and renaming of VLANs across a switched network.
Term 687
VTY (Virtual Teletype) lines are virtual ports on a Cisco network device that allow remote administration via Telnet or SSH.
Term 688
VXLAN is a network overlay technology that encapsulates Layer 2 Ethernet frames in UDP packets to extend VLANs across Layer 3 networks.
Term 689
A Web Application Firewall (WAF) is a security tool that filters, monitors, and blocks HTTP traffic to and from a web application to protect it from common attacks.
Term 690
A Wide Area Network (WAN) is a telecommunications network that connects multiple smaller networks, like local area networks, across large geographical distances.