TCP/IP Basic Concepts

 

The basic concepts of TCP/IP networking like IP address, subnet masks, network addresses , gateways, dns servers are understood.

This is a sample content from the book Network Design Guide for Beginners

IP address –

IP addresses are used by devices on a network to communicate with each other. The IP address corresponding to a system or device is configured on the TCP/IP adapter of the specific system.

Subnet Mask –

The subnet mask of a system is configured along with the IP address on a TCP/IP adapter. The subnet mask is used for identifying the network address for which the system belongs to.

Network address –

Every system on a network has a network address. The IP address along with the subnet mask would provide the network address to which the device or the system belongs.

Understanding Network address

The IP address and subnet mask of a device is ‘AND ed’ to yield the network address. For ex, if the IP address of a system is 192.168.1.1 and the subnet mask is 255.255.255.0, the network address of the system would be 192.168.1.0. The details of the derivation are shown below.
192.168.1.0 – 11000000.10101000.00000001.00000000
255.255.255.0 -11111111.11111111.11111111.11111111
N/W Address after AND’ing operating of network address and subnet mask is
11000000.10101000.00000001.00000000 – >192.168.1.0

Understanding gateways

Gateways are configured on systems and devices, when communications with different networks are required. The IP addresses of the gateways are configured on the TCP/IP adapter settings of the respective systems.

Understanding DNS servers

DNS servers are configured on TCP/IP adapters for name resolution. This is typically used on clients who require internet browsing or accessing systems via names.

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The above content is a sample  from the Ebook Network Design Guide for Beginners