🔰COMPUTER NETWORK
A computer Network is a group of two or more computers linked together so that communication between individual computers is made possible. Some of the common types of computer network include:
♨️Local Area Network (LAN)
This is a type of computer network where interconnected computers are situated very close to each other say for example, inside the same building.
♨️Wide Area Network (WAN)
This is a type of computer network where interconnected computers are separated by a large distance (a few km to few hundreds of km) and are connected using telephone lines or radio waves.
♨️Internet
The Internet is the largest network which interconnects various LANs and WANs. It is a global system of various interconnected computer networks belonging to government or private organizations.
🔰NETWORK HOST
A Network host (or simply referred to as a host) can be any computer or network device connected to the computer network. This computer can be a terminal or a web server offering services to its clients.
🔰NETWORK PROTOCOL
A network protocol (or just referred to as protocol) is a set of rules and conventions that are necessary for the communication between two network devices. For example, two computers on a network can communicate only if they agree to follow the protocols.
The following are some of the most widely referred network protocols
♨️Internet Protocol (IP Address)
An Internet protocol address (Ip address) is a unique number assigned to each computer or device (such as printer) so that each of them can be uniquely identified on the network
♨️ Private IP Address: A Private IP address is the one that is assigned to a computer on the
Local Area Network (LAN). A typical example of private IP address would be something like:
192.168.0.2
♨️Public IP Address: A public IP address is the one that is assigned to a computer
connected to the Internet. An example public IP address would be something like:
59.93.115.125
In most cases a computer gets connected to the ISP network using a private IP. Once a
computer is on the ISP network it will be assigned a public IP address using which the communication with the Internet is made possible.
🔰How to Find the IP Address of a Computer?
♨️Finding your public IP is extremely simple. Just type “what is my IP” on Google to see your public IP address displayed in search results.
♨️In order to find your private IP, just open the command prompt window (type cmd in the
“Run” box) and enter the following command:
ipconfig/all
Hyper Text Transfer Protocol (HTTP)
The Hyper Text Transfer Protocol provides a standard for communication between web browsers and the server. It is one of the most widely used protocol on the Internet for requesting documents such as web pages and images.
File Transfer Protocol (FTP)
The File Transfer Protocol provides a standard for transferring files between two computers on the network. FTP is most widely used in carrying out upload/download operations between a server and a workstation.
Simple Main Transfer Protocol (SMTP)
The Simple Mail Transfer Protocol provides a standard for sending e-mails from one server to another. Most e-mail systems that send mail over the Internet use SMTP to exchange messages between the server.
Telnet
Telnet is a network protocol that allows you to connect to remote hosts on the Internet or on a local network. It requires a telnet client software to implement the protocol using which the connection is established with the remote computer.
In most cases telnet requires you to have a username and a Password to establish connection with the remote host. Occasionally, some hosts also allow users to make connection as a guest or public.
After the connection is made, one can use text based commands to communicate with the remote host. The syntax for using the telnet command is as follows:
telnet hostname or IP> port
Example:telnet 127.0.0.1 25
SSH (Secure Shell)
SSH is a protocol similar to telnet which also facilitates connection to remote hosts for communication. However, SSH has an upper hand over telnet in terms of security. Telnet was primarily designed to operate within the local network and hence does not take care of security. On the other hand SSH manages to offer total security while connecting to remote hosts on a remote network or Internet.
Akin to telnet SSH also uses a client software and requires a username and Password to establish connection with the remote host.
A computer Network is a group of two or more computers linked together so that communication between individual computers is made possible. Some of the common types of computer network include:
♨️Local Area Network (LAN)
This is a type of computer network where interconnected computers are situated very close to each other say for example, inside the same building.
♨️Wide Area Network (WAN)
This is a type of computer network where interconnected computers are separated by a large distance (a few km to few hundreds of km) and are connected using telephone lines or radio waves.
♨️Internet
The Internet is the largest network which interconnects various LANs and WANs. It is a global system of various interconnected computer networks belonging to government or private organizations.
🔰NETWORK HOST
A Network host (or simply referred to as a host) can be any computer or network device connected to the computer network. This computer can be a terminal or a web server offering services to its clients.
🔰NETWORK PROTOCOL
A network protocol (or just referred to as protocol) is a set of rules and conventions that are necessary for the communication between two network devices. For example, two computers on a network can communicate only if they agree to follow the protocols.
The following are some of the most widely referred network protocols
♨️Internet Protocol (IP Address)
An Internet protocol address (Ip address) is a unique number assigned to each computer or device (such as printer) so that each of them can be uniquely identified on the network
Types of IP Address:
♨️ Private IP Address: A Private IP address is the one that is assigned to a computer on the
Local Area Network (LAN). A typical example of private IP address would be something like:
192.168.0.2
♨️Public IP Address: A public IP address is the one that is assigned to a computer
connected to the Internet. An example public IP address would be something like:
59.93.115.125
In most cases a computer gets connected to the ISP network using a private IP. Once a
computer is on the ISP network it will be assigned a public IP address using which the communication with the Internet is made possible.
🔰How to Find the IP Address of a Computer?
♨️Finding your public IP is extremely simple. Just type “what is my IP” on Google to see your public IP address displayed in search results.
♨️In order to find your private IP, just open the command prompt window (type cmd in the
“Run” box) and enter the following command:
ipconfig/all
Hyper Text Transfer Protocol (HTTP)
The Hyper Text Transfer Protocol provides a standard for communication between web browsers and the server. It is one of the most widely used protocol on the Internet for requesting documents such as web pages and images.
File Transfer Protocol (FTP)
The File Transfer Protocol provides a standard for transferring files between two computers on the network. FTP is most widely used in carrying out upload/download operations between a server and a workstation.
Simple Main Transfer Protocol (SMTP)
The Simple Mail Transfer Protocol provides a standard for sending e-mails from one server to another. Most e-mail systems that send mail over the Internet use SMTP to exchange messages between the server.
Telnet
Telnet is a network protocol that allows you to connect to remote hosts on the Internet or on a local network. It requires a telnet client software to implement the protocol using which the connection is established with the remote computer.
In most cases telnet requires you to have a username and a Password to establish connection with the remote host. Occasionally, some hosts also allow users to make connection as a guest or public.
After the connection is made, one can use text based commands to communicate with the remote host. The syntax for using the telnet command is as follows:
telnet hostname or IP> port
Example:telnet 127.0.0.1 25
SSH (Secure Shell)
SSH is a protocol similar to telnet which also facilitates connection to remote hosts for communication. However, SSH has an upper hand over telnet in terms of security. Telnet was primarily designed to operate within the local network and hence does not take care of security. On the other hand SSH manages to offer total security while connecting to remote hosts on a remote network or Internet.
Akin to telnet SSH also uses a client software and requires a username and Password to establish connection with the remote host.