Basics of a Computer Network:

What is a Computer Network? How Does it work? What can it perform for you? Some fundamental explacountries of each component are discovered in this short article.

You are watching: The unique identification number of a computer on a network

Computer netfunctioning is composed of exceptionally straightforward methodologies including the following:

Open system:A system which is connected to the network-related and also is ready for communication.

Closed system:A mechanism which is not connected to the network and can’t be communicated through.

Computer Network:It is the interlink of multiple tools, primarily termed as Hosts associated using multiple paths for the objective of sending/receiving data or media.Tright here are likewise multiple gadgets or mediums which helps in the communication between two different tools which are well-known as Netoccupational devices. Computer Network Ex: Rexternal, Switch, Hub, Bridge.


The layout pattern using which gadgets are interassociated is referred to as as netjob-related topology. Such as Bus, Star, Mesh, Ring, Daisy chain.


OSI:OSI stands for Open Solution Interconnection. It is a referral design that specifies standards for interactions protocols and also additionally the functionalities of each layer.

Protocol:A protocol is the collection of rules or algorithms which define the means how 2 entities have the right to interact throughout the network-related and also tright here exists different protocol identified at each layer of the OSI model. Couple of of such protocols are TCP, IP, UDP, ARP, DHCP, FTP and so on.


Host name:Each tool in the netoccupational is linked through a unique tool name recognized as Hostname.Type “hostname” in the command also prompt and also push ‘Enter’, this display screens the hostname of your machine.


IP Address (Net Protocol address):Also, well-known as the Logical Address, is the network-related address of the device throughout the network.To identify each gadget in the world-wide-internet, Net Assigned Numbers Authority (IANA) asindicators IPV4 (Version 4) attend to as a distinctive identifier for each tool on the Net.Length of the IP attend to is 32-bits. (Hence we have actually 232 IP addresses obtainable.)Type “ipconfig” in the command prompt and push ‘Enter’, this gives us the IP deal with of the gadget.

MAC Address (Media Access Control address):Also known as physical address, is the distinctive identifier of each organize and also is connected with the NIC (Network Interchallenge Card).MAC attend to is assigned to the NIC at the time of production.Length of the MAC resolve is : 12-nibble/ 6 bytes/ 48 bitsType “ipconfig/all” in the command also prompt and push ‘Enter’, this provides us the MAC address.

Port:Port deserve to be referred as a logical channel with which data can be sent/obtained to an application. Any organize may have multiple applications running, and each of this application is figured out using the port number on which they are running.Port number is a 16-little integer, therefore we have actually 216 ports accessible which are categorized as shown below:


Number of ports: 65,536Range: 0 – 65535Type “netstat -a” in the command also prompt and also push ‘Enter’, this lists all the ports being offered.


Socket:The distinctive combicountry of IP attend to and also Port number together are termed as Socket.

Couple of more conceptsDNS Server:DNS stands for Doprimary Name system.DNS is basically a server which equates web addresses or URL (ex: www.google.com) right into their matching IP addresses. We don’t have to remember all the IP addresses of each and also every webwebsite.The command ‘nslookup’ provides you the IP attend to of the domajor you are in search of. This likewise gives the indevelopment of our DNS Server.


ARP:ARP stands for Address Resolution Protocol.It is provided to transform the IP deal with to its matching Physical Address(i.e.MAC Address).ARP is provided by the Documents Link Layer to identify the MAC address of the Receiver’s machine.

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RARP:RARP stands for Reverse Address Resolution Protocol.As the name says, it gives the IP deal with of the device provided a physical attend to as input. But RARP has come to be obsolete given that the moment DHCP has actually come right into the photo.

For more indevelopment read this good short article offered by IBM – Networking A Complete Guide