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Computer Network Concept
A. Data Communication Review
• Types of data communication
1. Simplex : one-way communication where only one can send data, namely
the source and receiver only function as receivers. For example : Television
2. Half Duplex : two-way communication but cannot be done simultaneously,
but rather in a way. For example handy talky
3. Full duplex : a type of two-way communication that can be done
simultaneously. For example, mobile phones
• Communication media
1. Voice
2. Light
3. Picture
4. Radio waves
5. Analog electricity : voltage (1 – 5 V), current (4 – 20mA)
6. Digital electricity: parallel, serial (I2C, USART, SPI, USB, RS232, RS485,
TCP/IP)
B. Basic Concepts of Networking
• Definition
A computer network is a set of computers that can be interconnected with each
other using communication media, so that it can share data, information,
programs, and hardware (printer, hard drive, webcam, etc.)
• Advantages of computer networks
1. Communication
2. Sharing equipment and resources
3. Centralized security
4. Centralized administration
5. Data integration
6. Cooperation
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7. Cost, time and effort efficiency
8. Increased productivity
• Network type based on range jark
1. Local Area Network (LAN): LAN is used to connect personal computer
computers and workstations in a company that use equipment together and
exchange information with each other. range is a maximum radius of 10
kilometers.
2. Metropolitan Area Network (MAN): MAN is a LAN version that is the size
of a LAN larger and usually uses the same technology as LAN. MAN is an
option to build a network between offices within a city. Man ranges from 10
to 50 km.
3. Wide Area Network (WAN): A WAN is a network that has a very wide
distance because its radius covers a country and continent. In most WANs,
a network consists of a number of many cables or telephone lines that
connect one network with another with a media router.
C. Characteristics of Computer Networks
a) Security : Security is one of the most important characteristics of computer
networks. If the computer's network technology is not robust and secure,
unauthorized access to important data is possible.
b) Reliability : Computer networks are a very reliable tool, and by using this, users
can easily connect devices. Even if it is necessary to print, check mail, attend
meetings, and access data from other computers, their network experience
Computer Network Concept
A. Data Communication Review
• Types of data communication
1. Simplex : one-way communication where only one can send data, namely
the source and receiver only function as receivers. For example : Television
2. Half Duplex : two-way communication but cannot be done simultaneously,
but rather in a way. For example handy talky
3. Full duplex : a type of two-way communication that can be done
simultaneously. For example, mobile phones
• Communication media
1. Voice
2. Light
3. Picture
4. Radio waves
5. Analog electricity : voltage (1 – 5 V), current (4 – 20mA)
6. Digital electricity: parallel, serial (I2C, USART, SPI, USB, RS232, RS485,
TCP/IP)
B. Basic Concepts of Networking
• Definition
A computer network is a set of computers that can be interconnected with each
other using communication media, so that it can share data, information,
programs, and hardware (printer, hard drive, webcam, etc.)
• Advantages of computer networks
1. Communication
2. Sharing equipment and resources
3. Centralized security
4. Centralized administration
5. Data integration
6. Cooperation
, Made by_Kudalaut
7. Cost, time and effort efficiency
8. Increased productivity
• Network type based on range jark
1. Local Area Network (LAN): LAN is used to connect personal computer
computers and workstations in a company that use equipment together and
exchange information with each other. range is a maximum radius of 10
kilometers.
2. Metropolitan Area Network (MAN): MAN is a LAN version that is the size
of a LAN larger and usually uses the same technology as LAN. MAN is an
option to build a network between offices within a city. Man ranges from 10
to 50 km.
3. Wide Area Network (WAN): A WAN is a network that has a very wide
distance because its radius covers a country and continent. In most WANs,
a network consists of a number of many cables or telephone lines that
connect one network with another with a media router.
C. Characteristics of Computer Networks
a) Security : Security is one of the most important characteristics of computer
networks. If the computer's network technology is not robust and secure,
unauthorized access to important data is possible.
b) Reliability : Computer networks are a very reliable tool, and by using this, users
can easily connect devices. Even if it is necessary to print, check mail, attend
meetings, and access data from other computers, their network experience
