Wireless LAN (WLAN)

IST provides a full suite of consulting services to help you plan, design, implement, and operate a secure wireless network. Our networking experts have extensive knowledge in current and emerging wireless network standards and implementations, including IEEE 802.11 protocol, RF engineering and spectrum allocation, large-scale wireless network design, and wireless security architecture

Digi - Wireless Device Networking

Digi - Wireless Device Networking
"...device networking for business, develops reliable products and technologies to connect and securely manage local or remote electronic devices over the network or via the web."
Wi-Fi - 802.11a/b/g Wireless LAN Networking -
External and embedded Wi-Fi products make it easy to add embedded 802.11a/b/g wireless LAN networking to any electronic device, or to connect serial devices over a Wi-Fi network.

Network Cable Tester, LAN Tester

Detailed Product Description

Specifications:
This LAN tester for different cable types is indispensable in network installation and maintenance.
This compact device can be used for testing network.
Telephone (rj-45 rj-11 rj12) and most types of computer cable
----LED indication
----advanced design for easy testing
----ability to test cables from a distance and in places that are not easily accessible
----automatically runs all tests and checks for continuity, open, shorted and crossed wire pairs
----switch can automatic shut when open 2-3 minute
----tests: rj-45, 10 base-t, token ring, rj11 / 12 cable
----power supply supply 9v-battery (not incl)

Network Server

Detailed Product Description
A. Network Attached Storage
Multiple users can access the same storage device to share and exchange files. Simply connect up to two USB drives to the M-DM Download Manager, set up a shared folder and let users access the files via local network connection using SMB or FTP.

B. Printer sharing
No need to connect the printer to a specific computer, only need to connect it to this product and this product should be in Local area network, then, all of the computer in the Local area network can use this printer

C. FTP server
The FTP utility on the Mac will be able to read the data on the network storage but you can not write new data to the drive. To do that,you will need to install a dedicated FTP application,which can either be a free utility or professional shareware programs.
Outside Hard drive as a FTP Server, any user who knows IP ID or Password of this products can download the shared data on the hard disk through internet.
Function is similar with some companies which download product data with long-distance.

D. Support BT or other download method
MDT-LS201 Download Manager allows you to put up to ten Torrent files in to a queue, and will download two at a time, to maximise the speed of the download. As soon as one download is finished, the next one will automatically start. If one download is for any reason broken off, the Download Manager will go on to the next download and try that one again later. You can then turn off your computer and go about other things (like sleeping!) and when you come back, you will have all kinds of new media files to enjoy.
After setting the download contents to this product on PC, then, close the PC, this product also can work for long time or finish download task independently.
User group can focus on SOHO crowd, you can download Electronic book or film, or other documents with it when no power on computer.

F. USB OTB Copy
The USB copy function can be used to copy data from one USB storage device to another.Simply connect both drives,tum them on and press the copy button to start the process.In general,the source is on port B and the destination is on port A but there are a couple of exceptions.
The copy function will copy all data stored on the source drive,create a new folder on the destination drive with the current time and then paste the files into that newly created folder.

G. Universal Plug and Play (UPnP is only available on request)
The MDT-LS201 Download Manager supports UPnP v1.0. If you have other devices that can access UPnP storage devices,you will be able to share your files on the attached USB drives in the local network via UPnp
There is no need to configure anything,this function is turned ON by default and other devices will be able to recognise it automatically.
Ø Up to two external USB storage drives
Ø Interface/Ports 10/100Base-TX Auto MDI/MDI-X, 1 port (RJ-45)
Ø USB 2.0 High Speed (USB1.1), 2 upstream ports (Type A)
Ø Half-Duplex and Full-Duplex operation
Ø TCP/IP (UPnP available on request)
Ø Up to 8 simultaneous connections
Ø DHCP Setup, Auto IP, Fixed IP, System Time (NTP)
Ø Setup for Accounts, Status, Access Right and User Setup, Share Level Access
Ø Input: AC 100-240V, 0.6A, 50-60Hz
Ø Output: DC +5V/2A
Product Size 133mm x 8.0mm x 2.0mm

Firewall

A Firewall is a device which combines hardware and software to secure access to and from a network. A firewall allows security administrators a great deal of flexibility and control to allow/disallow certain ports, protocols, and access to certain machines. Typical configurations for a corporate network include a "DMZ" area (de-militarized zone) which is the only section of the network with direct access to and from the Internet.

The typical corporate environment has three zones: External (untrusted), DMZ (untrusted internal), and Internal (trusted). A DMZ is used as an “in-between” zone between the internal network and the external network (the Internet). It is designed to compartmentalize security access and reduce the risk of malicious users gaining access to an organization’s resources. We refer to this zone as untrusted as it has connections between the servers within this zone and the external network (the Internet).

A firewall can operate in several layers of the OSI model. There are four categories of firewalls:

• Packet filtering firewall
• Circuit level firewall
• Application level firewall
• Stateful inspection firewall
  

A packet filtering firewall is a router or computer (with special software) which screens incoming and outgoing packets. It reads information contained in each packet's TCP and IP headers then accepts or denies the packets based on the rules it has configured. Typically, it looks at rules based on the source address, the destination address, the application, the protocol, the source port number, or the destination port number. A packet filtering firewall operates only in the network layer of the OSI model.

A circuit level firewall monitors TCP handshaking between packets from trusted clients or servers to untrusted hosts to determine if the session is legitimate. A circuit level gateway checks the handshaking occurring with the synchronize (SYN) and acknowledge (ACK) packets in TCP. Since these packets occur at certain times and in a certain order, the circuit level gateway determines if they are operating correctly before allowing the communication. This type of firewall operates at the session layer of the OSI model.

An application level firewall operates a proxy between internal and external machines. It intercepts incoming and outgoing packets and copies and forwards the information to the destination addresses. The application level firewall acts as a proxy for the services it can proxy. For example, you can setup an application level firewall to proxy http and telnet requests - if you do not have it configured to proxy FTP requests, those would get dropped. An application level firewall checks packets up through the application layer of the OSI model.

A stateful inspection firewall combines aspects of the previously described firewalls. It operates at the network layer of OSI model, filtering all incoming and outgoing packets based on source, destination IP address, and port numbers. It also functions as a circuit level firewall by determining which packets in a session are appropriate. A stateful inspection firewall can also mimic an application level gateway in the application layer. A stateful inspection firewall is one of the most common firewalls as it combines features of the first three types.

Transceiver

A Transceiver, or media converter, is a device which interfaces between the network and a local node. An example of a transceiver is an MAU. A transceiver generally converts to different types of connectors, like AUI and RJ-45.
An MAU is a media attachment unit - a device which connects the computer to the Ethernet network.
A transceiver works at the Physical layer (layer 1) of the OSI model.

Modem

A Modem is a device which enables a computer to transmit data over analog telephone lines. Modem is short for modulator-demodulator. A modem converts the digital information in a computer into analog data. Traditional modems can operate at a top speed of 56Kbps, though most do not go that fast on today's phone lines.
A lot of companies still rely on dial-up access using modems for connectivity, though companies are increasingly moving to other methods of connectivity including cellular modem cards and high speed Internet access (such as DSL or cable modem).
A modem operates in the Physical Layer (layer 1) of the OSI model.