Computer Network Tutorial

Introduction of Computer Network Types of Computer Network Network Topology Computer Networking Architecture Transmission Modes (Data Flow) Basic Networking Devices Integrate Services Digital Network (ISDN)


OSI Model TCP/IP Model

Physical Layer

Digital Transmission Analog Transmission Transmission Media Switching

Data Link Layer

Error detection and Error correction Data Link Control Multiple Access Aloha

Network Layer

Network Layer - Logical Address Address Mapping Unicast Routing Protocol

Transport Layer

Process to Process Delivery User Datagram Protocol Transmission Control Protocol Stream Control Transmission Protocol Session Layer and Presentation Layer

Application Layer

Domain Name System Application Protocol E-mail Cryptography


Classes of Routing Protocols Classification of Routing Algorithms Controlled Access Protocols in Computer Networks Differences between IPv4 and IPv6 Fixed and Flooding Routing Algorithms Advantages and Disadvantages of Fibre Optics Cable APIPA Difference between Active and Passive FTP Fiber Optics and its Types Method of Joining and Fusion of Fiber Optic Cable Define Framing in Computer Network Disadvantages of Computer Network Mesh Topology Diagram in Computer Network Ring Topology in Computer Network Star Topology in Computer Networks 4G Mobile Communication Technology Advantages and Disadvantages of LAN Advantages and Disadvantages of MAN Advantages and Disadvantages of WAN Application Layer in OSI Model Cyclic Redundancy Check Example Data link layer in OSI model Difference between Transport and Network Layer Hamming Code Example Network Layer in OSI Model Session Layer in OSI Model Transport Layer in OSI Model Two Port Network in Computer Networks Uses of Computer Networks What is Computer Network What is Framing in a Computer Network Advantages and Disadvantages of Bus Topology Difference between Star Topology and Bus Topology Subnetting in Computer Network Subnetting Questions and Answers What is Bus Topology What is Network Topology and Types in Computer Networks Access Control in Networking Basic Characteristics of Computer Network Benefits of SOCKS5 Proxy in Computer Networks Computer Network viva Questions Difference between BOOTP and RARP Difference Between Network Topologies and Network Protocols Difference between NFC and RFID Difference Between Point-to-Point Link and star Topology Network Differences Between MSS and MTU Differences Between Trunk Port and Access Port Different Modes of Communication in Computer Networks MIME Protocol in Computer Networks Modes of Communication in Computer Networks Network Attack in Computer Network Port Address in Networking Simplest Protocol in Computer Network Sliding Window Protocol in Computer Network Stop And Wait Protocol in Computer Networks TCP 3-Way Handshake Process in Computer Networks What is a Proxy Server What is APPN What is ICMP Protocol What is Point-to-Point Protocol What is Port Address in Networking What is the HDLC Protocol What is VRRP Protocol Difference Between Analog and Digital Signals Difference Between Hub and Repeater Difference between Repeater and Switch Difference Between Transparent Bridge and Source Routing Bridge Source Routing Bridge in Computer Networks Transparent Bridge in Computer Networks Transport Protocol in Computer Networks Types of CSMA in Computer Networks What is Wired and Wireless Networking Network Security in Computer Network Disadvantages of Extranet Difference Between TELNET and FTP Define Protocol in Computer Networks Guided Transmission Media in Computer Network What is a Gateway in a Computer Network IGMP in Computer Networks LAN Protocols in Computer Networks MAN Meaning in Computer Modulation Techniques in Computer Networks Switching in DCN TCP/IP Applications What is IGMP? What is Modem in Networking What is Non-Persistent CSMA Difference between Cell Splitting and Cell Sectoring Forouzen Computer Network Open Loop and Closed Loop Congestion Control Types of Cluster Computing WAP-Wireless Access Point What are the elements of the Transport Protocol Difference between Gateway and Switch Flow Control in Data Link Layer Body Area Network Flooding in Computer Network Token Ring in Computer Networks VoIP in Computer Networks What is Infrared Transmission Congestion Control Techniques Forward Error Correction (FEC) Switching Techniques What is Telnet in Computer Network What are the Types of IPv4 Addresses IEEE 802.6 (DQDB) IEEE 802.15.4 Technology What is HDLC (High-level Data Link Control)? What is SMS Hubbing in Telecom? Circuit Switching in Computer Networks Communication Satellites in Computer Networks Features of HTTP Protocol IMAP4 (Internet Message Access Protocol) Internet Services How to Set up a Wireless Router Internetwork Routing in Computer Networks Distributed Computing System Features of GSM The 802.11 MAC Sublayer Protocol What is IEEE 802.3? What are Hubs and Switches in Computer Networks? What is Modem in a Computer Network? What is multicasting in Computer Networks? GSM -The Mobile Station What is Network Server? Slotted Aloha in Computer Network What is Ethernet in Computer Networks What is Arpanet? Radio Access Network (RAN) TCP 3-Way Handshake Process PING SWEEP (ICMP SWEEP) Print Server Private IP Address Security Services in Computer Networks Protocol Data Unit (PDU) CSMA with Collision Avoidance (CSMA/CA) What is Gateway in Computer Network? Advantages of Networking Data Link Layer Design Issues DHCP in Computer Networks Internet Security Association and Key Management Protocol (ISAKMP) What is Switch Hub? Telnet Full form in Networking Multimedia Systems Quality of Service in Computer Networks What is Carrier Sense Multiple Access (CSMA)? What is Circuit Switching What is Duplex Network? What is Web Protocol Network LAN Technologies Classes in Computer Network Low-Density Parity Check (LDPC) Wireless Internet Service Providers(Wisps) What is Handshaking?

Star Topology in Computer Networks

Star topology comes from or is a part of the network topology which was invented by Dr.Howard Frank. It is also to be known as star network because of its physical arrangement, and it is one of the most common network setups where every device or network components are connected to central nodes which are known as hubs or switches. Star topology is mainly used to improve communications between the devices by the help of central nodes which provides amplification services. Further that, it does not have any limit to how many computers it can connect, however, issues may arise such as the network performance may decrease, which means that network speed may slow down which will lead to poor performance. Star topology is also used for Local Area Network where different nodes are individually connected to a specific central connection point. Further, it has common protocols.

Star Topology

Before proceeding further about start topology, let’s discuss other types of Network topologies:

Types of Topologies

1. Bus Topology:

Is a type of network topology where network connections are being made using a single cable. It is a multi- connection network, so it's less secure.

2. Ring Topology:

A ring topology is a network where connections are made in such a way that it creates a circular path.

Here the data flows in a specific direction only. Further, this network is less expensive than star topology, also, it transmits data at a high speed. Above all, it is less secure.

3. Mesh Topology:

These are topologies where every device is connected with each other through a particular channel.

It follows the AHCP protocol, and this topology provides full security and privacy. Though its installation process is difficult.

4. Tree Topology:

Is a network type where connections made with various elements are arranged in such a way that it forms the structure of the branches of a tree. In this topology error detections and error, connections are very easily done.

Star Topology

In this article, we will discuss in detail about Star topology:

What is Star Topology?

Star Topology in simple words can be defined as the “network topology where connections are made through separate cables to a central section known as 'Hubs'.  

In star topology, the central hubs which have been created are termed 'server', and the nodes connected are known as' host '. When host device transfers the information/data to another host, firstly the data is sent to central hub and then to the receiver host. Further, all nodes have a specific address.

Note: If any issues arise on the nodes, it will not lead to any network failures whereas, if issues arise in the central hub, then the whole network will stop working.

Features of Star Topology

Some of the features of star topology are;

  • Star topology has less maintenance.
  • Networks are easy to install.
  • Nodes are connected to hubs.
  • Identifying faults in topology is very easy.
  • No disruptions occur while adding/removing the cables.
  • The entire network is controlled by hubs.
  • Its performance is of high-class level.

Advantages and Disadvantages of Star Topology

There are various advantages as well as disadvantages of star topology.

So, few of the advantages are:

  • Star topology is less expensive as compared to mesh technology.
  • It is easily managed.
  • It helps to improve network performance.
  • It can be easily modified.
  • It is strong in nature.
  • No data collision occurs.
  • On removing the devices from connection no disruption occurs to the network.
  • It is reliable, which means even if one of the cables fails working it will not create any impact.
  • It is highly efficient and safe to use.

Some of the disadvantages of star topology are:

  • It requires extra hardware.
  • If the central hub or nodes fail the whole system will fail.
  • Difficult in cable installation.
  • Cables are required more than in a linear bus.
  • The uses of central hubs and switches increase the cost of the network.

Applications/Uses of Star Topology

Some of the uses of star topology are;

  • It is highly used in schools/institutes computer labs,
  • It is also used in banking where several banking users are connected with each other
  • It is used in airports, hospitals and, Local Areas Network (LAN), etc.


In this contemporary world with the advancement in technology, we want the information to be received and shared quickly and network topology is one of the best means for us. Star topology is the easiest topology as compared to all as it requires only minimal components. It is much more secure than other networks. Further, it is a point-to-point topology and it is the fastest among all types. Also, in star topology data is being saved so that it can be easily backed-up if there is any failure in the network. Having knowledge about various topologies will allow any individual or business to decide which network will suit them best and help them in the long term. In a star topology, the peripheral nodes, or what is called the speaker nodes, are used for increasing the maximum point-to-the point transmission distance between a central node and peripheral nodes. The way that such networks look resembles the stars, therefore named as Star topology. Further, it is typically used on home networks, in which the central connecting point can be the router, switch, or networking hub. Setting up a network in your home or building a large enterprise network, the star topology may be worth considering.