Chapter One: Exploring the Network Flashcards
CCNA Certifcation Study Cards, Lesson One
Cisco often brings up the term “human network”. Explain what this refers to.
The “human network” is referring to how both humans and their communities online share information between people, interconnected throughout the globe using a network, the Internet. It also refers to how most human beings are connected globally online.
List the different forms of communication brought on by the globalisation of the internet.
Texting, Social Media, Blogs, Wikis, Podcasts, Wikis, Collaboration and Peer-to-Peer.
Describe a home network.
Simple networks that enable regular people to share common resources, these can be things like printers on a network, or documents, images and music on a file server.
Describe a small office, or small home office network.
Like home networks, but usually a little more complex and often setup by an individual administrator allowing them to work from home, this includes teleworkers who need to connect to a corporate servers or centralised resources on an external network. Advertising, sales, supply acquisitions and customer communication are examples of some of the work done from these locations.
Describe a medium to large network.
A broader scale network model that provides consolidation, data storage and access to external work servers. It can also provide collaborative services to employees so they can effectively work together. These are the most likely to be providing products and services through their internet presence and connection.
Describe a world wide network or an internet.
The largest network in the world, a network of networks in fact. It is a collection of interconnected networks both publicly and privately accessible and is comprised of a combination of all the other types of networks.
The __________ is the largest network in the world.
The Internet is the largest network.
Explain what servers are.
Servers are systems with specific software installed that enables them to provide information or services. Something like a LAMP or LEMP stack installed on a *nix operating system that acts as the backbone of a website, or an email server using iRedMail that sends and receives emails for a custom domain. These devices serve content to other clients.
Explain what client systems are, and what they do.
Client systems are basically the opposite of a server, instead of providing services or data they are making requests to display or access the data that servers serve. A good example is Google Chrome, a web browser.
What are the advantages of peer-to-peer networking?
They’re incredible easy to setup.
It’s less technically complex than another form of networking like tradition the traditional client-server model.
It has a lower cost associated with its use and deployment over dedicated servers which require physical hardware to interact as a medium.
It’s superior for simple tasks like sharing a printer over a network or transferring files.
Conversely, what are the disadvantages of of peer-to-peer networking?
There’s no centralised administration, it’s simply the peers connecting to each other that manage the network. Everything is really everywhere.
It’s not as secure as a monitored, administrated network, with the ability for malicious users to do damage over a network with an intrusion prevention system.
Peer-to-Peer networks aren’t really deployed with scalability in mind.
All devices can act as both a server and a client. Think torrents. sending (Seeding/Peers) and receiving (Leeching/Downloading) However, when doing both at the same time it begins to impacts device performance.
The network infrastructure contains three categories of network components, what are they?
The first, are devices. The hardware connecting to the internet. Think computers, phones, and tablets.
Media refers to the physical element of the internet, anything that can transmit a signal or data. Cables, fibre optics and Ethernet cables (Cat5A/RJ-45) are all forms of connective media.
Services include common network applications people use regularly, these can be things like hosted email servers (Gmail/Outlook) or web hosting services. (AWS, Google Cloud, Azure)
____________ is often the visible spectrum of a network platform, these can be things like switches and routers, wireless extenders or devices themselves.
Hardware, is often the most visible element of a network.
The network devices that people are most familiar with are called _________.
They are called End Devices.
How can one end device be distinguished from another on a network?
It can be distinguished by either its IP address (numbered), or its MAC address (hardware) or we could give it a unique name.
