Points to remember
● The Internet is a network of global connections – comprising private, public, business, academic and government networks – linked by guided, wireless and fiber-optic technologies.
● ARPANET was Advanced Research Projects Agency (ARPA) of the U.S. government in 1969 and was first recognized
● INTRANET: It is a private network within an enterprise to share company data and computing resources between the employees.
● EXTRANET: It is a private network that uses Internet technology and the public telecommunication system to securely share business’s information with suppliers, vendors, partners, customers, or other businesses.
● Communication over mobile network is be made up of voice, data, images and text messages.
● RFID –(Radio Frequency Identification) uses RF wireless technology to identify.
● Open System Interconnection (OSI) model was found in the year 1934, over all basis that permits network protocols along with software and schemes to be developed based on Universal guidelines.
● Transmission Control Protocol/Internet Protocol, TCP/IP is a set of protocols permitting communications among all computers on the Internet.
● HTTP – A protocol used between a web client and a web server protects non-secure data transmissions. The core protocol of the World Wide Web.
● HTTPS - A protocol used between a web client and a web server permits secure data transmissions.
● FTP - Used between computers for sending and receiving data. Enables a client to send and receive complete files from a server.
● Internet Protocol (IP): routable protocol which uses IP addresses to deliver packets. It is an unreliable protocol, does not guarantee delivery of information.
● Address Resolution Protocol (ARP): Resolves IP addresses to MAC (Medium Access Control) addresses.( A MAC address is a hardware identification number that uniquely identifies each device on a network.)
● Internet Control Message Protocol (ICMP): Used by network devices to send error messages and operational information.
● Transmission Control Protocol (TCP): Provides reliable connection oriented transmission between two hosts. It guarantees delivery of packets between the hosts.
● Simple Mail Transfer Protocol (SMTP): Provides e-mail services.
● Domain Name System (DNS): A method of refering to other host computers by using names rather than numbers.