Hi folks, .. I hope everybody is doing good. I am starting off my ccna studies and this blog keeps track of my learning. I may also record a few other stuff that I learn at work. But its difficult for me to find time amidst my work schedule. I'll try to post as much as possible.
Let's start off with some general networking.
What is a Network ?
A Network is nothing but devices/things connected together, so that those devices/things can communicate with each other. This term - 'Network' is used in a variety of contexts including telecom, television and even social 'Network' :p.
Network is all around us :p
What is a Computer Network ?
A Computer network consists of two or more devices connected together for sharing data/information and services. Usually, each device in a network is technically called a 'node'. A node miight be a computer, a printer or even some electronic door connected to a switch ( I have helped in installing one in our network :D).
What is a protocol?
A protocol is a set of rules that defines how communication takes place between different devices.
Example : HTTP, SIP.
Reference Models
Network reference models were then used to define how products from different manufacturers communicate with each other. OSI Reference model was the first one to be developed. But TCP/IP is the standard today.
Types of Networks
The two major types of network include : LAN and WAN.
LAN : Local Area Network
Usually a LAN covers a small geographic area with a very high speed. By small geographic area, I mean to say a Building, or may be a college campus. Ethernet is a LAN technology.
WAN : Wide Area Network
Unlike LAN, WAN covers a large geograhic area but the speeds are not in par with LAN networks. To name a few WAN technologies : MPLS, Metro Ethernet, Frame relay.. and a few more that I don't remember now. Usually, these are taken care by the Service Providers.
Topologies
A Network topology is how the devices are connected together, both in terms of logical and physical arrangement. By logical, I refer to data flow.
Topologies include Star, Bus, Mesh and Ring. I find topologies to be boring ( being honest). I would make a detailed post of it only when i find it really really interesting.
I'll definitely write on OSI and TCP Models , as they are very much essential for understanding computer networks in the long run.
This is it for today. Questions on this are welcome. We'll soon start off with IP Subnetting (My favorite). I tend to keep my posts short and simple.
Let's start off with some general networking.
What is a Network ?
A Network is nothing but devices/things connected together, so that those devices/things can communicate with each other. This term - 'Network' is used in a variety of contexts including telecom, television and even social 'Network' :p.
Network is all around us :p
What is a Computer Network ?
A Computer network consists of two or more devices connected together for sharing data/information and services. Usually, each device in a network is technically called a 'node'. A node miight be a computer, a printer or even some electronic door connected to a switch ( I have helped in installing one in our network :D).
What is a protocol?
A protocol is a set of rules that defines how communication takes place between different devices.
Example : HTTP, SIP.
Reference Models
Network reference models were then used to define how products from different manufacturers communicate with each other. OSI Reference model was the first one to be developed. But TCP/IP is the standard today.
Types of Networks
The two major types of network include : LAN and WAN.
LAN : Local Area Network
Usually a LAN covers a small geographic area with a very high speed. By small geographic area, I mean to say a Building, or may be a college campus. Ethernet is a LAN technology.
WAN : Wide Area Network
Unlike LAN, WAN covers a large geograhic area but the speeds are not in par with LAN networks. To name a few WAN technologies : MPLS, Metro Ethernet, Frame relay.. and a few more that I don't remember now. Usually, these are taken care by the Service Providers.
Topologies
A Network topology is how the devices are connected together, both in terms of logical and physical arrangement. By logical, I refer to data flow.
Topologies include Star, Bus, Mesh and Ring. I find topologies to be boring ( being honest). I would make a detailed post of it only when i find it really really interesting.
I'll definitely write on OSI and TCP Models , as they are very much essential for understanding computer networks in the long run.
This is it for today. Questions on this are welcome. We'll soon start off with IP Subnetting (My favorite). I tend to keep my posts short and simple.
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