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networking

networking. NETWORK DEVICES. BRIDGE. A bridge device filters data traffic at a network boundary. Bridges reduce the amount of traffic on a LAN by dividing it into two segments. Now it allows the frame to go from one port to other port only when the frame is dedicated to that port. SWITCH.

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networking

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  1. networking NETWORK DEVICES

  2. BRIDGE • A bridge device filters data traffic at a network boundary. Bridges reduce the amount of traffic on a LAN by dividing it into two segments. • Now it allows the frame to go from one port to other port only when the frame is dedicated to that port.

  3. SWITCH • A network switch or switching hub is a computer networking device that connects network segments. • It can read Mac address available at each port, according to which filter table is generated inside it, using which it handles the transactions between the different ports.

  4. Working of switch

  5. MANAGEABLE SWITCH • Basically same as normal switch, only difference is that, it is configurable due to which it provides some additional features as mentioned below. • To create VLAN’s • Provide individual port security. • Ports can be configured to operate for both voice as well as data. • VOIP device connectivity.

  6. MANAGEABLE SWITCH

  7. router • Router is used for WAN connectivity. • It is configurable device, we can program it as per our requirement. • It provides Routing. • It provides WAN security. • It provides Inter-VLAN communication.

  8. router

  9. modem • A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information.

  10. Types of modems • Cable modem. The cable modem uses a coaxial cable television lines to provide a greater bandwidth than the dial-up comuter modem. An extremely fast access to the Web is providing by the cable modem with downstream transmission up to 38 Mbits/s and an upstream transmission up to 1 Mbits/s. • Dial-up modem Used to access Dial-up internet .Dial-up Internet access is a type of Internet connectivity that operates through a standard telephone line.

  11. DSL modem. DSL (Digital Subscriber Line) modem is exclusively used for connections from a telephone switching office to the user. This technology, available and frequently usable, split up into two main categories 1] ADSLor Asymetric Digital Subcriber Lineis used in North America and supports from 1.5 Mbits/s up to 9 Mbits/s of downstream transmission rate and up to 3 Mbits/s of upstream transmission rate. 2] SDSL. SDSL or Symetric Digital Subcriber Line is used in Europe and has the same data rates for downstream and upstream transmission which is 128 Kbits/s.

  12. Wireless Modem:Some Internet Service Providers supports wireless internet services. The wireless modems are used for this service. These modems work similar to traditional wired modems except its structure. • GPRS Modem:The GPRS modems are used to browser internet and for other communication using the GPRS services. The GPRS (General Packet Radio Signals) service is provided on the cellular networks.

  13. modems

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