User Guide

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Technical Terms and Abbreviations
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TNW
Acronym for trusted network.
Untrusted network
The term untrusted network refers to users or devices of an area which is
considered not secure or not protected. Typically, this area is a network
outside the trusted network.
UTNW
Acronym for untrusted network.
VLAN
Virtual LAN. Any broadcast domain that is partitioned and isolated in a
computer network at the data link layer (OSI layer 2). LAN is the
abbreviation for local area network and in this virtual context refers to a
physical object recreated and altered by additional logic. VLANs work by
applying tags to network frames and handling these tags in networking
systems – creating the appearance and functionality of network traffic that
is physically on a single network but acting like split between separate
networks. In this way, VLANs can keep network applications separate
despite being connected to the same physical network, and without
requiring multiple sets of cabling and networking devices to be deployed.
VLAN 1
Cisco switches have a factory configuration in which default VLANs are
preconfigured to support various media and protocol types. The default
Ethernet VLAN is VLAN 1. It is a security best practice to configure all the
ports on all switches to be associated with VLANs other than VLAN 1. This
is usually done by configuring all unused ports to a black hole VLAN that is
not used for anything on the network. All used ports are associated with
VLANs distinct from VLAN 1 and distinct from the black hole VLAN. It is
also a good practice to shut down unused switch ports to prevent
unauthorized access.
VPN
Virtual Private Network. It extends a private network across a public
network and enables users to send and receive data across shared or
public networks as if their computing devices were directly connected to the
private network.
Each end of the connection is an VPN endpoint. The connection between
them is a VPN tunnel.
VPN-EP
VPN endpoint.
ZBP
Zone boundary protection.