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Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).
A mini network switch installed in distant rooms, to support a small cluster of Ethernet ports from one uplink cable. PoE power is fed into the PD (or PoE in) port. These switches may in turn power remote PoE devices using PoE pass through. Intercom and public address systems and hallway speaker amplifiers.
Ethernet. The Point-to-Point Protocol over Ethernet ( PPPoE) is a network protocol for encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet frames. It appeared in 1999, in the context of the boom of DSL as the solution for tunneling packets over the DSL connection to the ISP 's IP network, and from there to the rest of the Internet.
The Link Layer Discovery Protocol ( LLDP) is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on a local area network based on IEEE 802 technology, principally wired Ethernet. [ 1] The protocol is formally referred to by the IEEE as Station and Media Access Control ...
A network switch (also called switching hub, bridging hub, Ethernet switch, and, by the IEEE, MAC bridge[ 1]) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device. A network switch is a multiport network bridge that uses MAC addresses to forward data ...
Port mirroring. Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. This is commonly used for network appliances that require monitoring of network traffic such as an intrusion detection system, passive probe or real ...
In computer networking, Cisco ASA 5500 Series Adaptive Security Appliances, or simply Cisco ASA, is Cisco 's line of network security devices introduced in May 2005. [ 1] It succeeded three existing lines of Cisco products: Cisco PIX, which provided firewall and network address translation (NAT) functions, ended its sale on July 28, 2008. [ 2]
Network access control is a computer networking solution that uses a set of protocols to define and implement a policy that describes how to secure access to network nodes by devices when they initially attempt to access the network. [ 3] NAC might integrate the automatic remediation process (fixing non-compliant nodes before allowing access ...