Table of Contents
Connection, Packet, Network
Medium Access Control
IP, ICMP, TCP
Connection- In the context of networking, a connection indicates those pieces of related information
which a network transfers. Prior to the transfer of data, a connection is built which exists till data
transfer takes place.
Packet- A packet carries data between two ends. It refers to the most basic unit of data that a
network transfers. Each packet has a header portion. Information about the packet, such as source,
destination, timestamps etc. is contained in this portion. The data that is being transferred is contained
in the main portion, which is usually called the body.
Network Interface- It refers to any type of software interface or networking hardware. It can be
associated with a physical device or it can be a virtual interface’s representation.
Connection, Packet, Network Interface
LAN- LAN is the abbreviation for Local Area Network. It is either a network or a certain portion of a
network which cannot be accessed publicly by the Internet. Its examples are the networks in houses
WAN- WAN is the abbreviation for Wide Area Network, which in terms of a network is more
extensive than a LAN. It usually refers to the Internet. Any interface that is connected to a WAN is
assumed to be reachable through the Internet.
A protocol refers to a collection of standards and rules which specifies the language that a device uses
for communication. There are various protocols which are used in networking. These are usually
implemented in different layers. Its examples are TCP (Transmission Control Protocol), UDP (User
Datagram Protocol), ICMP (Internet Control Message Protocol) etc.
Port- A port is essentially an address that is associated with a single machine which can be linked to a
specific piece of software. It does not indicate a physical interface or location. It