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 Hub and Repeater

What is hub?

An access point for a network that uses several devices is referred to as a hub, sometimes known as a network hub. It functions as a central connection for all of the devices connected by a hub. The hub has a number of ports. If any packet reaches one port then that packet may be seen by all other ports. A network hub has no routing tables or intelligence. It broadcasts all network data across all connections (unlike a network switch or router).

In the past years, hubs were less expensive than switches and routers, so they were high in demand. These days, switches offer greater network solutions and are far less expensive than hubs.

Features of Hub

  • It broadcasts and uses shared bandwidth.
  • There is just one broadcast domain and collision domain included.
  • It operates at the OSI model's physical layer and supports half-duplex transmission mode.
  • It also has a flexibility characteristic offering the high transmission rate to various devices.

Applications of Hub

Following are some of a hub's key applications:

  • Hubs are used to build tiny home networks.
  • It serves as a network monitoring tool.
  • Also, they are utilized in businesses to offer connection.
  • It is possible to use it to build a device that is accessible outside of the network.

What is a Repeater?

A repeater is a type of network device that is used to extend the distance of a network segment by amplifying the signal of incoming packets and retransmitting them on the other side of the segment. A repeater is essentially a regenerator that removes the noise and interference from the incoming signal and retransmits it.

The primary function of a repeater is to regenerate the signal of incoming packets so that they can move to a long distance without losing their quality. A repeater is typically used in those situations when the distance between two network devices exceeds the maximum distance supported by the network medium.

For example, if a network cable can transmit data up to a maximum distance of 100 meters, and the distance between two network devices is 150 meters, a repeater can be used to regenerate the signal and extend the reach of the network.

A repeater operates at the physical layer of the OSI model, which is responsible for the transmission and reception of raw bit streams over a physical medium. At this layer, the repeater receives the incoming signal and transmits it on the other side of the network segment. The repeater does not interpret the moving data, but simply regenerates the signal so that the data or information can be transmitted over a longer distance.

Types of Repeaters:

1. Analog Repeaters

2. Digital Repeaters

Analog Repeaters:

Analog repeaters are used to amplify and regenerate analog signals. They are commonly used in analog networks, such as analog telephony networks. Analog repeaters detect and amplify the incoming signal and then retransmitting it on the other end or device of the network segment. They are designed to remove any noise or interference from the incoming signal so that the signal quality is maintained throughout the network.

Digital Repeaters:

Digital repeaters are used to regenerate digital signals. They are commonly used in digital networks, such as Ethernet networks. Digital repeaters detect and amplify the incoming digital signal and retransmitting it on the other end of the network segment. They are designed to remove any signal degradation or attenuation that may occur during transmission.

Hub vs Repeater in Tabular form

The following table shows the main differences between hub and repeater:

1.Hub is a layer 1 (physical layer) device. At least one network must be available to connect the hub device.Repeaters operate in the third OSI layer with the first OSI layer.
2.It broadcasts the input received from one port to another networked device.It's employed to replicate the signal or information.
3.A hub is a multiport repeater in which a signal introduced at any port's input manifests at every port's output.Repeaters are less clever than bridges and switches.
4.Hub network device is not an intelligent device.A repeater is an intelligent device than a hub.
5.Hub is less expensive than the repeater.The repeater is expensive but not much more.