wcnetworkslog.txt

<ankit> : hello
<Samvid> : hello!
<ankit> : s/Guest45174 please rejoin with a different name
<ankit> : let us wait for sometime 
<ankit> : ok everyone up?
<Samvid> : yup
<venkat> : yes
<ankit> : ok so one or two more are joining I guess 
<ankit> : till then, how many of you know any basic stuff about networks? 
<Samvid> : I know some basics
<venkat> : just some basics of packets...
<krishna_> : which language will be used for socket programming?
<ankit> : we will come to socket programming maybe at the end of this session or in the next session 
<krishna_> : okay
<ankit> : we will need to get a few basic concepts though 
<pun> : I'm new to networks.
<ankit> : I am gonna assume everyone of you are 
<satish_> : Okay
<ankit> : if someone has experience before, please bear with me 
<ankit> : sorry for the delay, its due to the connection problem you can see on whatsapp 
<sh___> : @ankit : Has the session started?
<ankit> : not yet, some people were facing trouble with the joining process 
<sh___> : ok cool
<sh___> : Who is Mr. OSI?
<ankit> : that's the bot 
<sh___> : lol ok
<sh___> : 5 more to join rite?
<ankit> : ok we will start 
<ankit> : I was waiting for the log to sync 
<ankit> : so yea, like any conventional classroom lets start with, What's network?
<pun> : computers interconnected?
<Samvid> : group of interconnected devices
<sh___> : What do u mean by connected ?
<Suhag> : the devices can communicate and exchange information with each other somehow
<sh___> : Yup
<sh___> : Anyone knows what's a port
<Samvid> : dont know the formal definition
<sh___> : alright u can just say it's purpose
<krishna_> : location where network can physically connect
<sh___> : yup
<sh___> : and ip ?
<Samvid> : oh i thought you were talking about virtual ports
<sh___> : no I haven't reached there yet
<Puneet> : ip addresses are used to identify each device on a network?
<Samvid> : ip - internet protocol
<krishna_> : location of computer in network
<ankit> : ok many of you would have come across port a few minutes back 
<sh___> : ok i meant ip address
<ankit> : I know Puneet did 
<ankit> : and same goes for IP addresses 
<Puneet> : I did. :D
<ankit> : so all this are identifier, before we go to them let's understand the organisation of networks 
<ankit> : A computer network follow a layered structure 
<ankit> : Any network enthusiast came across the word OSI before?
<Samvid> : yup
<ankit> : what do you know about it?
<Samvid> : its a model to describe networks and network communications, sort of
<ankit> : ok kinda, it's a "theoritical" model which specifies network as  7 layered model 
<ankit> : the current network follows a similar architecture with 5 layers 
<ankit> : Physical, Data link, Network, Transport and Application 
<sh___> : Basically it describes the various phases of data transfer between 2 systems
<ankit> : ok whats application of networking?
<Suhag> : data transfer, communication, shared resources
<sh___> : yup
<ankit> : That's weird, most of them say multi player gming now a days 
<Suhag> : lol
<Samvid> : that differentiates kids from college students :P
<ankit> : so yea transfer needs a sender and a receiver 
<ankit> : right?
<Samvid> : yeah
<sh___> : sender - sends data and receiver - receives data
<sh___> : If you have to send a post to someone, u need to know their address
<sh___> : that's why we have ip addresses
<ankit> : and address is like house, street, city, state right?
<sh___> : so ur house number is like port
<sh___> : and socket is ip address + port number
<ankit> : A general user interact with network using applications 
<ankit> : a very simple example of application?
<ankit> : hint: you are using it right now 
<ankit> : ??
<Samvid> : chat applications?
<ankit> : yes 
<ankit> : so user interact with applications 
<ankit> : applications run on a port 6667 is the preferred port for IRC 
<ankit> : port are connected to IP addresses 
<ankit> : and hence port+IP becomes your network identifier 
<Puneet> : application runs on a port or a device connects through a single port?
<ankit> : You have 65536 port in your system 
<ankit> : one application has one port 
<shr> : the first 1024 ports are reserved ports
<ankit> : for well known applications 
<ankit> : 9 for ping 
<ankit> : 8080 for HTTPS
<ankit> : and so on 
<shr> : Any doubts?
<ankit> : a socket is an abstract implementation of the whole network stack 
<shr> : What do u understand when he uses the term abstract
<Suhag> : the socket is not a physical thing
<Puneet> : Ports are virtual?
<ankit> : no Ports are physical 
<ankit> : you have that many ports in your hardware 
<ankit> : or you can call it logical 
<shr> : http://averma82.blogspot.in/2013/05/what-is-portnumber-logical-port.html
<shr> : read that 
<ankit> : so yea back to socket 
<ankit> : in a very vague term its combination of ip address and port 
<ankit> : Every application has to create a socket to use network 
<ankit> : so the first assignment is a socket programme 
<ankit> : The preferred language is C 
<shr> : has anyone done socket programming before?
<ankit> : and please don't use python 
<ankit> : after you are done with this it will easy for us to explain you concepts
<Puneet> : Any link for us to look up?
<shr> : https://www.tutorialspoint.com/java/java_networking.htm
<ankit> : I will share for C 
<shr> : Should suffice, although it's in java
<ankit> : Anyone has problem with no python rule? :D
<shr> : me :P
<Samvid> : C is fine
<ankit> : Cool 
<Puneet> : C is more preferable ;D
<shr> : I hope everyone knows C
<siddhanth> : C is good
<ankit> : lets complete the layer then 
<ankit> : In the eye of a network developer 
<ankit> : Application layer is for app and web dev ppl 
<ankit> : Physical layer is for EE/EC ppl 
<ankit> : and we concentrate of the rest 3 
<ankit> : Data link layer is the place where packets get queued and is sent from 
<ankit> : Network layer is used for identifying the nodes and routing your info 
<ankit> : and Transport layer serves the application 
<ankit> : over the next 15 days we will go through these functions 
<ankit> : next session doubts of sockets 
<ankit> : and CSMA  
<ankit> : and ARQ 
<ankit> : please complete the program 
<ankit> : any doubts 
<ankit> : I will be hanging out on this channel 
<Samvid> : we have to write a socket programme as the first assignment?
<yash> : hi guys
<yash> : finally i was able to join
<ankit> : yes @Samvid
<ankit> : Hi Yash 
<Samvid> : ok cool
<ankit> : I will send you links 
<ankit> : I am always approachable 
<Guest9084> : ok
<ankit> : Use C/C++ or Java 
<ankit> : any doubts I will be available on whatsapp and IRC 
<Suhag> : is this the end of this session?
<Guest9084> : yes...i will hav a lot of doubts....lol
<ankit> : I sped up through the session, so from next session try joining in advance 
<Suhag> : bye
<Guest9084> : ya i dint understand y it happened
<Suhag> : sorry that was by accident
<ankit> : I will be available on whatsapp and on this channel as well