How computer networking works

During the past 25 years, every sphere of industry has been covered by computer network of various types. Learning the basic of how these computer network works help us to better use them and also increases our knowledge of changing world around us.

What is network device?

A network device consists of special communication hardware so as to make the physical connections to other device. Most of the modern network devices have communication electronic built onto their circuit boards.

Some of the PCs, older Xbox consoles, and older devices don’t have the communications hardware but it can be set up by plugging in separate network adapters in the form of USB peripheral.

Some old desktop PCs need physically inserting large add-in cards on the system motherboard which gives origin to the term Network Interface Card.

New generation of consumer appliances and gadgets are being built as network devices whereas older devices were not.

Roles of devices on computer networks

Devices on computer networks function in different ways. The two common roles are clients and servers. PCs, phone, tablets and network printers are common examples of clients. Clients make request and use data stored in network servers. Servers include devices with large amount of memory and high performance processor to support clients. Examples of network servers are Web servers and game servers. Network generally supports many clients than servers. Clients and servers are also called network nodes.

Network devices are capable of working as both clients and servers. For e.g. in a peer to peer networking a pair of devices share data with each other, in this process one acts as a server hosting data while simultaneously working as a client to request data from peer devices.

Special purpose network devices

Server and client nodes can be added or removed from the network without blocking communication between other devices. However other types of network hardware still exist for allowing a network to run

·        A network hub allows any node connected to it directly send data to other

·        Network switches function as same as hubs but they include additional hardware logic that opens up multiple communication paths that enables multiple connected nodes to send data to each other

·        Network routers further increase the capabilities of network switches by allowing connections outward from itself to other networks and joining them together without disturbing the functionality of each of them individually.

·        A network repeater accepts the physical signals sent across a network connection and increase their strength so that the signal can travel longer distance.

·        Network bridge connects two different types of physical networks links together 

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The most incredible article about Basics of Networking you'll ever read

Networking is the process of connecting two or more computing devices with each other for sharing data. Computer networks are constructed using hardware and software.

Area Networks

Computer networks are categorized in various different ways. According to one approach the networks are defined on the basis of geographic area which it covers.

Local Area Networks( LANs) is used to connect  a single home, small office building, school whereas wide area network(WANs) is able to connect cities, states or more wider areas. Internet is considered as world largest public WAN.

Network design

Computer networks can also be defined on the basis of design approach. The two most common form of network design are client/server and peer to peer. Client server network comprises centralized server computer that can store email, files, web pages and applications. On the other hand in a peer to peer network, all computers will be able to support the same functions. Client server networks find its application in business whereas peer to peer networks are most commonly used in homes. 

A network topology defines its structure and layout from the point of view of data flow. In bus network, for example, all the computers communicate and share across one common conduit. While in a star network all the data flow takes place through one centralized device.

Common network topologies are bus, ring network, star and mesh networks.

Network Protocols

Computer devices use communication languages which are called network protocols. The set of protocols that computer network support is another way to classify them. Networks often use multiple protocols and each of them supports specific applications. One of the popular protocol is TCP/IP which is also the most common protocol found on the internet and in home networks.

Home Networking

Home Networks are managed by ordinary homeowners with little or no technical knowledge. Broadband router hardware produced by various manufactures has been designed to simplify home network setup. With the help of home broadband routers; devices in different rooms can efficiently share a broadband internet connection and that allow people to easily share the files and printer within a particular network and increase overall network security.

Home networks have grown with each generation of new technology. Earlier people commonly use home network to connect a few PC, and share some of the documents, but now there is increased usage of network game consoles, smart phones for streaming video and sound and digital video recorders. Home automation systems have grown in popularity with arrival of practical system for controlling lights, appliances and digital thermostats.

Business Networks

Often businesses require an additional communication, security and data storage therefore a business network contain multiple LANs. Companies with large set up uses wide area networking to connect various branch offices together. Voice over IP communication, back up technologies and network storage are most common in businesses. Some of the big companies also have their internal websites called intranets for connecting to other employees.

Internet and Networking

Computer networking has gained immense popularity with the introduction of World Wide Web (www) in the 1990s. Public web sites, peer to peer file sharing systems and a large no. of services run on internet servers all over the world.

Wired and Wireless Networking

Most common network protocols like TCP/IP, has its efficiency in wired and wireless networks. Networks with Ethernet cables are more commonly used in businesses, homes and schools for the several decades. Wireless networking has emerged as the popular technology for building new computer networks which include smartphones and other wireless gadgets that have contributed to the rise of mobile networking.

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A brief description of Cisco Networking Academy

In 1996 Cisco Systems, that design, sells and manufactures network equipments, found that the networking industry was booming and there was a huge requirement of professionals who can design, manage, build and secure computer networks. As a result Cisco Networking Academy was launched by Cisco system that provides an online training curriculum, aimed to help high schools and college students to learn the fundamental skills for designing, building and troubleshooting computer networks. 

Networking Academy was launched in October 1997 at 64 educational institutes that covers 7 US states. Since its inception it has expanded to almost 9000 high schools, technical schools and colleges and community organizations in 50 states of US and 170 countries. The curriculum is taught in 16 languages from all over the world. Over five million students have gone through these courses with more than 125 million online assessments.

Cisco systems give its credit to the strong public private partnership for Networking Academy massive growth. The company’s mission to create a distributed delivery structure where it could reach a maximum no. of students by partnering with educational institutions has worked. Cisco provides free Networking Academy online content, free instructor training and lab material to its institutional partners. 

Network bulls is one such institutional partner of Cisco. Network Bulls reviews are positive; it has one of the biggest Cisco labs in entire Asia. All the trainers are CCIE certified. The students can practice on real time Cisco devices. It has an excellent placement record with 5000 students placed in a span of 6 years. Network Bulls reviews from its students also speaks a lot of its world class training program.  

How Networking Academy works

In Networking Academy education model the training is provided using face to face facilitation by instructors, hand on lab, in person and online learning. Cisco assists the training partners with a large no. of instructional tools, hands on lab material, simulation tool, online practice activities, a visualization and assessment engine Cisco Packet Tracer and educational games. The partnering institutions also get discounted equipment bundles and support services with a global 24/7 NetAcad help desk.

Cisco Netspace

Networking Academy gives its online curriculum and assessment with the help of cloud based learning management system known as Cisco Netspace. Students can go through online course material, complete assessments and assignments and connect with their instructors with the help of Cisco Netspace. The portal is open all the time through which students can complete their assignments at their convenient time.

In this system instructors can manage their courses. The site is also used as a management system for Networking Academy administrators to simplify common administrative task like scheduling, enrollment tracking and managing equipment inventory. Regular updates on course curriculum and assessment are also done through this system for Networking Academy 9,000 sites.

Guide to CCNA Security Certification

The Cisco Certified Network Associate Security (CCNA Security) is recognized as an associate or foundation level of Cisco Certification. CCNA Security Certified professionals have the necessary skills to protect network security, building a security infrastructure, detecting security threats and confirming availability of network data and devices. The blog is an answer to all aspiring network professionals queries related to CCNA Security Certification.

1.    What is the motive of CCNA Security Certification introduced by Cisco?

CCNA Security certification by Cisco is meant to provide networking professionals specialization in security and offer experienced networking professionals a way to take their career ahead with advanced skills. Cisco CCNA security certified professionals are in great demand in the networking industry.

Networking industry need professionals with skills and knowledge of handling security devices and applications in a security infrastructure, detect security threats and recognize vulnerabilities.

2.    What are the employers thought about the need for CCNA Security certified professionals?

Out of all networking professions security and risk management can be considered as one of the most highly challenging and demanding field. As per Cisco report dedicated security roles will be going to exist in almost 80% of the companies in future compared to 46% existence today.

3.    What are the expected roles for CCNA Security certified professionals in networking industry?

CCNA Certified professionals can work as network security specialist, security support engineer and security administrator. During this certification candidates will have an overview of security challenges and gain the required skills to install, troubleshoot and monitor Cisco security solutions for maintaining a small branch office network. The program mainly features Cisco routers and switches that are deployed using graphical user interface tools and common line interfaces. You will be introduced about the security policy and how it affects the network.

4.    What are steps to clear a CCNA Security exam?

For clearing CCNA Security exam candidates need to pass Cisco 640-554 IINS. The Implementing Cisco IOS Network Security (IINS) exam associated with the CCNA Security Certification test the candidate knowledge on securing Cisco routers and switches and their concerned networks. It also develop skills in installation, troubleshooting and monitoring of network devices to maintain confidentiality, integrity and presence of data and devices and develop expertise in the technologies that Cisco uses in its security infrastructure.

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