vLAN |
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Short for virtual LAN, a network of computers that behave as if they are connected to the same wire even though they may actually be physically located on different segments of a LAN. VLANs are configured through software rather than hardware, which makes them extremely flexible. One of the biggest advantages of vLANs is that when a computer is physically moved to another location, it can stay on the same vLAN without any hardware reconfiguration. |
| VPN Tunnels |
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Virtual private network (VPN), a network that is constructed by using public wires to connect nodes. For example, there are a number of systems that enable you to create networks using the Internet as the medium for transporting data. These systems use encryption and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted. |
Policies
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Security policies are rules configured to apply to traffic that crosses zones. For example, a session initiated by Host A (in the Private Zone) to Host B (in the Public zone) would be subject to the policy set associated with both traffic flow from Private Zone to Public Zone. |
Sessions
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NetScreen firewalls track traffic passing through the firewall based on flows and sessions. An individual flow is identified by the combination of source and destination address, protocol, and protocol-specific upper layer identifiers (ports in the case of TCP or UDP, message ID in the case of ICMP, etc.). As most connections require two-way communication between devices, the two flow between the devices are tracked together in memory as a session. When spelled MBps, short for megabytes per second. |
Throughput
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The amount of data transferred from one place to another or processed in a specified amount of time. Data transfer rates for disk drives and networks are measured in terms of throughput. Typically, throughputs are measured in kbps, Mbps and Gbps. When spelled Mbps, short for megabits per second, a measure of data transfer speed (a megabit is equal to one million bits). Network transmissions, for example, are generally measured in Mbps. |
Terms and defintions are from Webopedia , the online dictionary.
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