TCP and UDP are communication protocols that allows us to send and receive data in a network. We have both for a reason since each has its advantages and disadvantages. In this video we will talk about two protocols, pros and cons of each one and will write tcp and udp server with nodejs showing you these in ACTION. coming up
Code! 
https://github.com/hnasr/javascript_playground/tree/master/tcp
Jump Codes ? 
tcp pros cons(4:12)
Tcp demo (19:00)
Udp pros cons (24:25)
Udp demo (31:25)
Summary (35:40)
Explain TCP 
Pros: 
acknolwedgment, 
garenteed delivery, 
connection based
congestion control
ordered packets 
Cons
Larger packets
More bandwidth since more headers. 
Slower (because of retransmission) 
stateful once connection is lost its lost, cannot resume it.  
TCP Example (Code)
telnet 127.0.0.1 8080
Explain UDP
Pros
Statless, 
Less bandwidth 
smaller packets
Faster to transmit 
Cons
no ack, 
no garenteed delivery, 
no congestion control
no ordered packets 
UDP client
echo "foo" | nc -w1 -u 127.0.0.1 41234
2:24 osi model tag 
14:20 stateful. S stateless video