Networking

Networking

Switch:

1.     Switch is a networking hardware that connects devices on a computer network by using packet switching to receive and forward data (multiple computers connected in a local area networks)

Gateway:

1.     A Gateway is a piece of hardware that is used to connect the different networks to communicate with each other

Router:

1.     A router is a networking device that forwards data packets between computer networks 9Control the traffic)

Network Traffic:

Network traffic based on 3 types

1.     Broadcast: Refers to transmitting a packet that will be received by every device on the network   

2.     Multicast: is a group communication where data transmission is addressed to a group of destination computers simultaneously

3.     Unicasting: in a computer networking, unicast is a one to one transmission from one point to another point, one sender and one receiver

Protocols:

In the networking and communications area, a protocol is the formal specification that defines the procedures that must be followed when transmitting or receiving data. Protocols define the format, timing, sequence, and error checking used on the network

1.     TCP: (Transmission control protocol) Reliable protocol, connection oriented protocol, perform three ways handshake, provision for error detection and retransmission, most applications use TCP for reliable and guaranteed transmission

FTP, HTTP, HTTPS

2.     Unreliable protocol, connectionless, much faster than TCP, no acknowledgement waits, no proper sequencing of data units, suitable for applications where speed matters more than reliability

DNS, DHCP, TFTP, ARP, RARP