Teknologi Kolaboratif

Komunikasi Komputer
Proses dimana dua atau beberapa komputer atau perangkat memindahkan data, perintah, dan informasi.


Penggunaan Teknologi Komunikasi
• Voice mail
• Fax
• E-mail
• Chatroom
• Instant Message
• FTP
• Newsgroup
• Telephony
• Videoconference
• Groupware
• Global Positioning System (GPS)


Jaringan
• Sekumpulan komputer dan perangkat yg saling berhubungan melalui perangkat komunikasi dan media transmisi.
• Fasilitas komunikasi antar user berbagi sumber daya dengan pengguna lainya.


Apakah local area network (LAN)?
• Jaringan yg menghubungkan beberapa komputer diwilayah yg geografisnya terbatas, seperti rumah, laboratorium, dan kantor yg berdekatan.
• Menggunakan protokol ethernet.


Apakah network operating system?
• The system software that organizes and coordinates the activities on LAN
• Also called a network OS or NOS


What are servers and clients?
• Server
o Controls access to the hardware and software on the network
o Provides a centralized storage are for programs
o Dedicated servers perform a specific task
• Clients
o Other computers on the network
o Rely on the server for resources
Apakah topologi Jaringan?
• Konfigurasi komputer dan perangkatnya dalam jaringan komunikasi.
• Umumnya topologi yg paling banyak digunakan ada 3 : Bus, Ring dan Star.


Topologi Bus?
• Terdiri atas kabel pusat tunggal , dimana seluruh komputer dan perangkatnya saling berhubungan.
• Bus adalah bentuk fisikalnya
• Bus juga disebut backbone
• Murah dan mudah di install


Topologi Ring?
• A cable forms a closed ring, or loop, with all computers and devices arranged along the ring
• Data travels from device to device around the entire ring.


Topologi Star?
• All of the devices connect to a central computer/hub
• All data that transfers from one computer to another passes through the hub


What is a dial-up line?
A temporary connection that uses one or more analog telephone lines for communications A modem at the sending end dials the telephone number of a modem at the receiving end
Advantages
Costs no more than making a regular call
Computers at any two locations can establish a connection using modems and the telephone network
Disadvantage
Cannot control the quality of the connection because the telephone company’s switching office randomly selects the line.


What is a dedicated line?
• A connection that always is established between two communications devices
• The quality and consistency of the connection is better because dedicated lines provide a consistent connection.


What is a modem?
A communications device that converts a computer's digital signals to analog signals before they are transmitted over standard telephone lines
Sometimes called a dial-up modem
mo + dem

modulate To change into an analog signal demodulate

To convert an analog signal into a digital signal


What is a digital modem?
One that sends and receives data and information to and from a digital telephone line such as ISDN or DSL


ISDN modem Also called an ISDN adapter Sends and receives digital data to an ISDN line DSL modem
Sends and receives digital data to a DSL line


What is a cable modem?
• A modem that sends and receives data over the cable television (CATV) network
• Currently much faster than a dial-up modem or ISDN
• Usually attaches to a USB port or a port on a network interface card


What is a network interface card (NIC)?
• A card you insert into an expansion slot of a personal computer or other device, enabling the device to connect to a network


What is twisted-pair cable?
• Consists of one or more twisted pair wires bundled together
• Each twisted pairwire consists of two separate insulated copper wires
• Twisted together to reduce noise
• Noise is an electrical disturbance that can degrade communications

Posted in: Jaringan,Komputer,Komunikasi,PTI