SonicWALL SSL-VPN 4000 Getting Started Guide Page 55
Glossary of Networking Terms
ActiveX
- A technology that allows the sharing of applications and data across the Web. For
example, Active X allows you to view Microsoft Word and Adobe Acrobat documents
within a Web browser without downloading the files and launching the appropriate
application. The SonicWALL SSL-VPN 4000 uses an ActiveX application, NetExtender,
to allow greater network access for Windows users.
Default Gateway
- A device on an internetwork that forwards packets to another network.
DHCP
- Dynamic Host Configuration Protocol allocates IP addresses to computers on the
network automatically without assigning a computer a static (fixed) IP address.
DMZ
- A network zone segregated from the LAN, typically used for servers accessible from
the Internet. Traffic between the Internet and the DMZ and between the DMZ and the
LAN can be carefully monitored and controlled. DMZ comes from “Demilitarized Zone”.
DNS
- Domain Name System, a hierarchical naming system that resolves a domain name
with its associated IP address. A DNS server looks up the name of a computer and finds
the corresponding IP address. This allows users to access hosts using friendly text-based
names instead of IP addresses. These names are called fully qualified domain names
(FQDN).
IP Address
- Internet Protocol Address, a thirty-two bit number that identifies a computer or
other resource on the Internet or on any TCP/IP network. The number is usually
expressed as four numbers from 0 to 255 separated by periods, for example,
172.16.31.254.
LAN
- A Local Area Network is typically a group of computers located at a single location, and
is commonly based on the Ethernet architecture.
NetExtender
- An ActiveX network client that allows Windows users to connect to a network
through the SonicWALL SSL-VPN 4000. When using NetExtender, users have access to
files and network resources as if they were physically within the network.
Portal
- A gateway, usually through the Internet to network resources or services. The
SonicWALL SSL-VPN 4000 provides a Portal as the user interface for remote access to
protected LAN resources such as Web and FTP servers, files shares, and remote
desktops.
PPPoE
- The Point to Point Protocol over Ethernet supports the transmission of network
packets over an analog phone line.
Private IP Address
- An IP address for a resource in your network that is not known or
published outside the zone (for example LAN) where it is located.
Public IP Address
- An IP address for a resource in your network that is published outside
your network to the WAN.
Router
- A device that routes data between networks through IP address information in the
header of the IP packet. A router forwards packets to other routers until the packets reach
their destination. The Internet is the largest example of a routed network.
SSL-VPN
- Secure Socket Layer Virtual Private Networking. A secured private
communications network usually used within a company, or by several different
companies or organizations, communicating over a public network. SSL technology is
used either for tunneling the entire network stack, or for securing what is essentially a
Web proxy.
