Basic Knowledge

Q: What is a router ? What is TCP/IP ?

It enables data to be routed between different networks, for example between an Ethernet Local Area Network (LAN) and a GSM, GPRS or PSTN Wide Area Network (WAN). It provides:

  • Protocol conversion at the network address layer typically routing TCP/IP protocols
  • Recovery of TCP/IP protocols from the local Ethernet protocols which are routed over PPP protocols for tranfers over GSM, GPRS and PSTN networks.
  • A firewall features to isolate networks and provide security for private networks.
  • It performs very little filtering; it simply transports TCP/IP protocols between the 2 networks. It is used to create a network with remote access and enables:

  • Private networks to be inter-networked with other networks such as the Internet.
  • Access to a private network
  • Security for the private network
  • TCP/IP is an open protocol or "common language", which enables 2 devices to communicate over a network.

  • The Internet Protocol (IP) enables a device to set up a "connection" to a remote device using a unique address, ie IP address.
  • Transmission Control Protocol (TCP) provides the "connection" between the devices.
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