Introduction to CCNA Networking devices, topologies, and Benefits of Networking
Networking is a vast domain, and Cisco provides an entry-level certification, the CCNA. But before enrolling for CCNA certification, a candidate must know the introduction to networking, which will help them understand the whole concept in an easy manner.
In this blog, we have covered the introduction of networking contents and tried to describe them in easy language, so a beginner can easily understand the networking concepts.
List of Contents
Let’s begin with the first topic
What is the use of Networking?
Networking helps solve the heavy work in an easy manner; it helps individuals as well as organizations. Let’s see a few of the best uses of networking below:
Types of Networks
There are many different kinds of computer networks, ranging from a room-sized network of mobile devices (such as smartphones or tablets) connected via Wi-Fi or Bluetooth to the millions of computers dispersed throughout the world.
Computer networks are broadly categorised based on the geographic area covered and the data transfer rate as follows:
LAN (Local Area Network)
Only authorised users within the network have access to other computers or shared resources, making LANs relatively secure. Users can upload and download files to and from the local server, as well as print documents using a connected printer.
MAN (Metropolitan Area Network)
An expanded LAN known as a “metropolitan area network” covers a greater geographic region, such as a city or town. Although the data transfer rate in MAN can also be measured in Mbps, it is far lower than LAN. MANs can be extended up to 40 km, and they are sometimes formed by connecting many LANs.
WAN (Wide Area Network)
A LAN could be joined to additional LANs by wired or wireless media to create a WAN. Through WAN, major corporations, institutions of higher learning, and governments link their various branches around the globe.
PAN (Personal Area Network)
A few personal gadgets, including computers, laptops, smartphones, printers, etc., are connected to create the network. These gadgets are all located within roughly a 10-meter radius. Either a wired or wireless personal area network is possible.
Multiple devices, such as modems, hubs, switches, repeaters, routers, gateway, etc., are needed to configure networks with different capabilities and to transmit data over various transmission mediums.
A modem device is used for conversion between analog signals and digital bits. ‘Modulator Demodulator’ is the full form of modem. Modems are used to connect the source and destination nodes. At the sender’s end, the modem functions as a modular to turn the digital data into analog impulses. In order for the destination node to understand the digital data, the modem at the receiver’s end demodulates the analog inputs.
This Ethernet card is also known as a “Network Interface Card.” The network adapter is mainly mounted on the motherboard of a computer and used to connect to the internet through a wired network.
Network cards are mostly controlled by software these days, as opposed to the days when we had to instal drivers for hardware devices.
A type of connector commonly used for Ethernet networking is the RJ45. It is a little wider than a phone jack, but otherwise similar. RJ45 stands for Registered Jack-45, and since each terminal of an Ethernet connection has an RJ45 connector, Ethernet cables are known as RJ45 cables.
A network device called an Ethernet hub is used to hook up various devices. Data received on one line is broadcast over the others. The disadvantage of using a hub is that data from two devices may collide if they arrive at the same time.
A bridge is utilised to divide a huge network into more manageable sections. The two separate network architectures or media types can be connected by a bridge, but the TCP/IP network layer protocols cannot. All segments must use the same network-layer protocols.
The three types of bridges are:
In a local Area Network, a switch is a networking equipment that is essential (LAN). A network switch is used to link several computers or communication devices together, much like a hub. When data is received, the switch takes the destination address out of the packet and checks a table to determine where to send it. As a result, it sends signals to only a few devices rather than all.
A router has more extensive capabilities than a hub or a switch since it can analyse the data being transmitted through a network, choose or modify how it is packed, and deliver it to a different type of network.
Whenever a router receives an incoming packet on one of its interfaces, it examines the packet’s destination address and then sends the packet to the interface that corresponds to the destination address based on that information.
The router keeps track of the networks that are linked in order to forward data packets to their destinations. The routing table is a database table where these records are kept. You can design routing tables either statically or dynamically.
All data entering or leaving a network must pass through a gateway in order to employ routing paths, which serve as the network’s entry and exit points. In addition to forwarding data packets, gateways also keep track of the host network’s internal connection paths and the known paths of other distant networks.
The topology of a network refers to how the computers and other devices are organized. The topologies of the mesh, ring, bus, star, and tree networks are popular.
In this topology, every device is connected to each other. Due to the simultaneous data transmission capabilities of several nodes, such a network can handle high traffic volumes.
⦁ Each node in a ring topology is connected to two new layers, one on each side. As a result, the nodes that connect to one another form a ring. A ring topology has a unidirectional link. Data can only be transferred in one direction as a result (clockwise or anti-clockwise).
Each communication device in a bus topology connects to a bus, which is a type of transmission medium. Data sent from a node is transferred to the bus and thereafter sent there in both directions. This implies that any node linked to the bus is capable of receiving data.
Each communication device is linked to a central node, which is a networking device like a switch or hub.Due to each device’s direct connection to the central device, start topology is thought to be particularly effective, efficient, and quick.
It is a hierarchical topology in which each branch may have one or more fundamental topologies, such as the star, ring, and bus. Such topologies are typically implemented in WANs that connect several LANs.
Advantages of CCNA Networking
Candidates who earned the Cisco Certification CCNA have seen signigicant job advancement. This specific certification serves as the entry point to more difficult Cisco training materials and certificate programmes.
Let’s check out the benefits of taking the CCNA networking course:
After clearing the CCNA certification, for many students, it becomes a game changer for them. Many of them got their first job in IT careers, and some of them got promotions in their respective fields.
Networking is the base of every IT domain, and those who want to build careers in the IT industry have to lay their foundations very carefully. Be sure you have the clear concept of networking before starting your career.
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