Protocol | Communication on the network is governed by sets of  | 
  | rules called protocols. Protocols provide the guidelines  | 
  | devices use to communicate with each other, and thus  | 
  | they have different functions. Some protocols are  | 
  | responsible for formatting and presenting and presenting  | 
  | data that will be transferred from file server memory to  | 
  | the file server’s net work adapter Others are responsible  | 
  | for filtering information between networks and forwarding  | 
  | data to its destination. Still other protocols dictate how  | 
  | data is transferred across the medium, and how servers  | 
  | respond to workstation requests and vice versa.  | 
  | Common network protocols responsible for the  | 
  | presentation and formatting of data for a network  | 
  | operating system are the Internetwork Packet Exchange  | 
  | (IPX) protocol or the Internet Protocol (IP). Protocols that  | 
  | dictate the format of data for transferors the medium  | 
  | include   | 
  | with Collision Detection (CSMA/CD), implemented as  | 
  | |
  | Information Protocol (RIP),a part of the Transmission  | 
  | Control Protocol/Internet Protocol (TCP/IP) suite,  | 
  | forwards packets from one network to another using the  | 
  | same network protocol.  | 
R
 | |
Router | A router is the network software or hardware entity  | 
  | charged with routing packets between networks.  | 
RTP | RTP   | 
  | protocol defined to deliver live media to the clients at the  | 
  | same time, which defines the transmission of video and  | 
  | audio files in real time for Internet applications.  | 
RTSP | RTSP   | 
  | used to transmit stored media to the client(s) at the  | 
  | same time, which provides client controls for random  | 
  | access to the content stream.  | 
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