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?

Disadvantages of Computer Network

What is Computer Network?

A computer network is a collection of interconnected devices that can communicate and exchange data with each other. Networks allow devices to share resources such as printers and file servers to communicate with one another in order to exchange information and collaborate on tasks.

Computer networks can be established using a variety of technologies including wired and wireless connections and can be configured in a variety of ways such as using a client server model or a peer to peer model.

The first computer network is generally considered to be the advanced Research Projects Agency Network (ARPANET), which was developed by the United States Department of Defense in the 1960s.

An example of a computer network is a local area network (LAN) in an office setting. A LAN typically connects computers and other devices in a single location such as an office building or a campus. The computers and devices on a LAN can communicate and share resources such as printers and file servers.

Another example of a computer network is a wide area network (WAN), which connects computers and devices over a larger geographical area such as across multiple offices in different cities or even across countries.

Moreover, WANs can be used to connect LANs together and can be established using technologies such as leased lines or satellite links.

The internet is also a type of computer networks, as it connects millions of computers and devices around the world.

Types of Computer Networks

  1. Nanoscale networks
  2. Personal area network (PAN)
  3. Local area network (LAN)
  4. Storage area network (SAN)
  5. Campus area network (CAN)
  6. Metropolitan area network (MAN)
  7. Wide area network (WAN)
  8. Enterprise private network (EPN)
  9. Virtual private network (VPN)
  10. Cloud network

Disadvantages of Computer Networks

There are several potential disadvantages of computer networks:

  • Cost: Setting up and maintaining a computer network can be costly, especially for larger organizations. The cost of hardware, software and personnel can add up quickly.
  • Security risks: Networked computers are most vulnerable to security threats such as hacking, viruses and malware. It is important to implement strong security measures to protect against these threats.
  • Dependence on technology: A computer network relies on technology and if something goes wrong with the network or the hardware and software, it can disrupt business operations.
  • Limited flexibility: A computer network is designed to work in a specific way, and designed to work in a specific way and making changes to the network can be complex and time-consuming.
  • Privacy concerns: Sharing data and resources over a network can raise privacy concerns especially if sensitive or confidential information is involved. It is important to have proper security measures in place to protect the privacy of network users.
  • Complexity: Large networks can be complex and it can be challenging to troubleshoot and fix problems that arise. This can require specialized knowledge and expertise to resolve issues.
  • Limited control: When using a computer network, individuals may not have as much control over their work environment as they would if they were working on a standalone computer. For example, network administrators may control access to certain resources or set policies that must be followed.
  • Compatibility issues: If a network includes a mix of different hardware and software platforms, it can be challenging to ensure that everything works together smoothly.
  • Performance issues: Networked computers can suffer from performance issues if there is a lot of traffic or if the network is not configured properly. This can lead to slowdown or delays.
  • Limited mobility: Depending on the type of network, users may not be able to access network resources from outside the office or from remote locations. This can limit the flexibility and mobility of users.


In conclusion, complete networks have the potential to bring many benefits to organizations, including increased efficiency, collaboration and access to information. However, there are also potential disadvantages to consider including the cost of setup and maintenance, security risks and the potential performance issues. It is important for organizations to carefully weigh the pros and cons of using a computer network and to implement appropriate security measures to protect against potential risks.