PCIT 06

• NETWORK TOPOLOGIES

  BUS TOPOLOGY

  STAR TOPOLOGY 

  MESH TOPOLOGY

  HYBRID TOPOLOGY

  RING TOPOLOGY
• TYPES OF NETWORK

  WIDE AREA NETWORK

  LOCAL AREA NETWORK

  METROPOLITAN AREA NETWORK

  PERSONAL AREA NETWORK
• IEEE- Institute of Electrical and Electronic Engineers
• ANSI - AMERICAM NATIONAL STANDARDS INSTITUTE
• ITU-T - International Telecommunication Union- Telecommunication Standard Sector
• ISO- International Organization for Standardization
• EIA - ELECTRONIC INDUSTRIES ASSOCIATION
• STANDARD CREATION COMITTEES

  IEEE

  ANSI

  ISO

  ITU-T

  EIA
• PROTOCOLS AND STANDARDS IN NETWORKING

  SEMANTICS

  SYNTAX

  TIMING
• DATA COMMUNICATION COMPONENTS

  MESSAGE

  SENDER

  RECEIVER

  TRANSMISSION MEDIUM

  PROTOCOL
• DATA COMMUNICATION CRITERIA

  DELIVERY

  ACCURACY

  TIMELINESS

  JITTER
• DATA REPRESENTATIONS

  TEXT

  IMAGE

  AUDIO

  VIDEO

  NUMBERS
• ANALOG SIGNAL- refers to signal thatbis continuos or taken continuous value
• DIGITAL SIGNAL - Physical signal represented by sequence discrete values.
• DATA - piece of information and can exist in variety of forms
• DATA COMMUNICATION - refers to the data movement of encodes information. Exchange of data between two devices. Transferring of data information.
• JITTER variation in the pocket arrival time, uneven delay of delivery.
• TEXT- represented as bit patyer (0s, 1s)
• NUMBERS directly converted by binary number to simply mathematical operations
• IMAGES - composed of matric of pixel. pixel is a small dot.
• AUDIO recording or broadcasting of sound.
• VIDEO- recording or broadcasting of pictures, combination of images.
• DATA REPRESENTATION - anything that can have two states can represent anything in digital devices
• COMPUTER NETWORK - interconnectivity of two or more computer system, much like a telephone system
• NETWORKING - communication mechanism that ties the isolated computer systems
• SYNTAX- refers to structure or format of data.
• SEMANTICS- REFERS TO THE MEANING OF EACH SECTION OF BITS
• TIMING- REFERS TO TWO CHARACTERISTICS, WHEN DATA SHOULD BE SENT AND HOW FAST COULD THEY BE SENT
• DE FACTO: by fact; Convention: been not approved.
• DE JURE: BY LAW; REGULATION : BEEN LEGISLATED.