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IPSecurity
IPSec provides IP network-layer encryption. IPSec can support large encryption networks
(such as the Internet) by using digital certificates for device authentication. It works at
the Layer 3 and secures everything on the network.
LAN
This is a communications network that serves users within a confined geographical area.
It is made up of servers, workstations, a network operating system and a
communications link. Servers are high-speed machines that hold programs and data
shared by network users. The workstations (clients) are the users' personal computers,
which perform stand-alone processing and access the network servers as required.
Diskless and floppy-only workstations are sometimes used, which retrieve all software
and data from the server. Increasingly, "thin client" network computers (NCs) and
Windows terminals are also used. A printer can be attached locally to a workstation or to
a server and be shared by network users. Small LANs can allow certain workstations to
function as a server, allowing users access to data on another user's machine. These
peer-to-peer networks are often simpler to install and manage, but dedicated servers
provide better performance and can handle higher transaction volume. Multiple servers
are used in large networks.
The message transfer is managed by a transport protocol such as TCP/IP and NetBEUI.
The physical transmission of data is performed by the access method (Ethernet, Token
Ring, etc.), which is implemented in the network adapters that are plugged into the
machines. The actual communications path is the cable (twisted pair, coax, optical fiber)
that interconnects each network adapter.
L2TP
L2TP stands for Layer 2 Tunneling Protocol. It is an extension of the Point-to-Point
Tunneling Protocol and is also used to establish virtual private networks. It is sometimes
used in conjunction with IPSec to provide authentication.
NAT
(Network Address Translation) This process allows all of the computers on your home
network to use one IP address. The NAT capability of the Barricade, allows you to access
the Internet from any computer on your home network without having to purchase more
IP addresses from your ISP.
Network Address Translation can be used to give multiple users access to the Internet
with a single user account, or to map the local address for an IP server (such as Web or
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