A BYTE is a sequence of a fixed number of binary digits. Digital computers use a binary code that is in a set of eight digits, or bits. Each such eight-digit group is called a byte. The use of a byte to mean 8 bits has become nearly ubiquitous. It is used to represent a character such as an alphabet, number, or a typographic symbol. It holds a string of bits which can be used for some larger unit of application. Example: a group of bits are used to display an image. It is usually represented with the symbol “B”. The storage capacity of a computer is usually measured in terms of “Bytes”. They are expressed in multiples of 2 and are expressed in a ‘rounded of’ decimal number.

Difference between Bits and Bytes:

Both are common in computer networking. Both terms refer to digital data transmitted over a network connection. A bit is a single numeric value, either '1' or '0', that encodes a single unit of digital information. A byte is a sequence of bits; usually eight bits equal one byte. Bits are grouped into bytes to increase the efficiency of computer hardware, network equipment, disks and memory.

Bytes are used networking, computer disks, memory, and in the central processing units. In all modern network protocols, a byte contains eight bits. Rarely, a few computers use bytes of different sizes for other purposes. They are frequently used to hold individual characters in a text document. Several bytes can be strung together to form kilobytes, megabytes, gigabytes, terabytes, and petabytes. Computer storage and memory is often measured in megabytes (MB). Similarly, one gigabyte (GB) is 1,024MB, a terabyte (TB) is 1,024GB, and 1 petabyte (PB) is 1,024TB.

The order in which bytes are sequenced in a byte-oriented network protocol is called the network byte order.
The maximum size of a single unit of transmission for protocols is also measured in bytes. Network programmers routinely work both with network byte ordering. The sequence of bytes in other parts of the computer may not follow the network byte order. Part of the job of the networking subsystem of a computer is to convert between the host byte order and network byte order when needed. Byte provides methods to compare instances of this type, convert the value of an instance to its string representation, and convert the string representation of a number to an instance of this type.