understanding of WAN, WAN type, and protocol HDCL

1. WAN Connection ProtocolWAN (Wide Area Network) is a network system connecting tissue between the Local Area Network (LAN) to the outside network or WAN is not constrained WAN system geografis.Pada areas we can access files / data owned by others in other places far enough
2. Some WAN ProtocolCurrently there are several WAN protocol to provide a communication mechanism pengiraman data over WAN network or Public network.• Protocol HDLC (High Level Data Link Control), is a WAN protocol that works at the data link layer where the HDLC protocol to establish a data packet encapsulation method on synchronous output Serial.HDLC ISO has a weakness that is still a significant Singelprotocol komunokasi only on one protocol, while for Cisco HDLC multiprotocol output which can perform data communication with many protocols (eg IP, IPX, etc.) and the protocol contained in the three layers simultaneously.• Point to Point (PPP) protocol on the data link that can be used for communications or Asynchronous Serial Synchronous Serial. PPP to perform authentication and is multiprotocol. Protocol is a development of the protocol SLIP (Serial Line inteface Protocol) is a standard protocol that uses TCP / IP.• X.25 Protocol is a protocol standard that defines the relationship between a terminal and Packet Switching network. For this protocol for data communication, which means the process of sending analog data must follow the algorithm - the algorithm that is the X.25 Protocol. Protocol did make a connection with a Virtual Circuit in which a special line on the public network is used for communication of data between the X.25 protocol• Frame Relay protocol to pengiriiman data on public networks. Same thing with protocol X.25, Frame Relay Virtual Circuit also wear a special data communication lines but the frame relay is still better than X.25 with a variety of fittings available on Frame Relay Protocol. Encapsulated packet on Frame Relay connections using identity called DLCI (Data Link Connection Identifier) ​​which manufacture Virtual Circuit track will be marked with a DLCI for the connection between the customer's computer to the switch or router as a frame relay node.• ISDN (Integrated Services Digital Network) is a digital service that runs over a network telepon.ISDN also data communication protocol that can carry packet data either in the form of text, pictures, sounds, videos simultan.Protocol ISDN operates at the physical, data link, and network.

types of connections, namely:• Leased Line, which is also known as a point-to-point or dedicated.Pada connection does not require call setup process to begin sending packets / data. Packet delivery mechanism carried Synchronous serial.• Circuit Switching, this connection first made the call setup in order to start sending packets, sebagaii PSTN and ISDN are examples of protocols that implement kineksi WAN Circuit Switching on the public network, or better known as the Internet. For the mechanism of asynchronous serial connection is done.• Packet Switching, Packet Switching for connections we can share the bandwidth to each user so that the connection will be more stable and can manage bandwidth according to the number pemakai.Packet Switching is a development of the Leased Line connection and its connection mechanism in Synchronous Serial.•3 .. HDLC protocol(High Level Data Link Control), is a WAN protocol that works at the data link layer where the HDLC protocol to establish a data packet encapsulation method on synchronous output Serial.HDLC ISO has a weakness that is still a significant Singelprotocol komunokasi only on one protocol, while for multiprotocol CISCO HDLC output which can perform data communication with a lot of protocol (eg, IP, IPX, etc.) and the protocol contained in the layer three simultaneously.