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? Cache Server What Is WSN Network? Check Sum Error Detection Linear Bus Topology Functions of the Transport Layer Infrared Transmission in Computer Networks Digital Signal in Computer Network Digital Data Transmission in Computer Networks Define Checksum with Example Computer Network Security Requirements Brust Errors in Computer Network Back Side Bus (BSB) 2-Dimension Parity Check in Computer Network Router and Brouter Microwave Transmission in Computer Networks Magnetic Media in Computer Network A One-Bit Sliding Window Protocol CDMA-Near-Far Problem Reference Models in Computer Networks Uni-cast, Broadcast, and Multicast in Computer Networks Uses Of Bridges in Computer Networks What are Gateways in Computer Network?

Difference between Star Topology and Bus Topology

Star Topology

Star topology is a network configuration in which each device is connected to a central node (or hub) that acts as a common connection point. This central hub is responsible for transmitting and receiving data to and from all connected devices. The star topology is a popular choice for Ethernet networks because it reduces the risk of network failure and improves performance by providing a dedicated connection between each device and the central hub.

Difference between Star Topology and Bus Topology

Characteristics of Star Topology

The main characteristics of star topology are:

  1. Centralized structure: Each device is connected to a central node, usually a hub or switch, which acts as a single point of communication.
  2. Point-to-point connections: Each device has a dedicated, point-to-point connection to the central hub.
  3. Improved reliability: If one device fails, it doesn't affect the rest of the network, as only the affected device is isolated.
  4. Scalable: The network can be easily expanded by adding more devices to the central hub.
  5. Easy maintenance: Diagnosing and repairing network issues is easier as each device has a separate connection to the central hub.
  6. Good performance: The network's performance is not affected by heavy traffic in one segment, as the central hub manages the flow of data.
  7. Increased cost: The cost of a star topology network is higher due to the need for a central hub and additional cabling.

Advantages of Star Topology

  1. Easy to install and manage
  2. Improved reliability and reduced network failure
  3. Easy to add or remove devices
  4. Scalable
  5. Centralized management and control
  6. Improved performance due to dedicated point-to-point connections
  7. Isolation of network problems to a single device
  8. Reduced cabling requirements compared to other topologies.

Disadvantages of Star Topology

  1. Single point of failure (central node)
  2. Higher cost due to need for central node and additional cabling
  3. Performance degradation when central node becomes congested
  4. Limited by the bandwidth of the central node
  5. Dependence on the central node for network communication.

Bus Topology

Bus topology is a type of network configuration in which all devices are connected to a single cable or bus that acts as the backbone of the network. Data is transmitted along this bus, and all devices can receive and access it. In bus topology, when one device sends data, it is broadcasted to all other devices on the network.

Difference between Star Topology and Bus Topology

Characteristics of Bus topology

  1. Linear structure: All devices are connected to a single cable, or bus, that acts as the backbone of the network.
  2. Broadcasting: When one device sends data, it is broadcasted to all other devices on the network.
  3. Cost-effective: Bus topology is a cost-effective option for small networks.
  4. Simple installation: It is simple to install and connect new devices to a bus topology network.
  5. Limited network size: Bus topology is limited in terms of network size and scalability.
  6. Single point of failure: The bus cable is a single point of failure, and if it fails, the entire network goes down.
  7. Collisions: Data collisions can occur if two devices try to transmit data at the same time.
  8. Performance degradation: As the number of devices on the network increases, the performance of the network can degrade.

Advantages of star topology

  1. Simple to install and configure
  2. Cost-effective for small networks
  3. Easy to connect new devices
  4. Low cost of cable and other network components.

Disadvantages of star topology

  1. Limited network size and scalability.
  2. Performance degradation as the number of devices on the network increases.
  3. Single point of failure (the bus cable) can bring down the entire network.
  4. Difficult to troubleshoot and diagnose network problems.
  5. Data collisions can occur if two devices try to transmit at the same time.

Difference between Star and Bus topology

FeatureStar TopologyBus Topology
StructureCentralized with each device connected to a central hub.Linear with all devices connected to a single cable.
Point to point connectionsEach device has a dedicated, point to point connection to the central hub.All devices are connected to a single bus cable.
ReliabilityImproved, as a failure in one device only affects that device.Reduced, as the bus cable is a single point of failure.
ScalabilityEasily scalable by adding more devices to the central hub.Limited by the size of the bus cable and the number of devices that can be connected.
PerformanceGenerally better, as the central hub manages the flow of data.Can degrade as the number of devices on the network increase.
MaintenanceEasier as each device has a separate connection to the central hub.More difficult as all devices share the same bus cable.
CostHigher due to the need for a central hub and additional cabling.Lower for small networks, due to the simple installation and low cost of components.