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Binary Terms

The Computer Science & IT Guide

Neha T

Special IP Addresses in IPv4

1st January 2020 by Neha T 1 Comment

As in classful addressing, some blocks of addresses or some addresses in each block have been reserved for the special purpose & that’s why they are termed as special IP addresses. The special addresses of classful addressing were inherited by the classless addressing when it was introduced in 1996. There can be an entire block of addresses reserved for special … [Read more...] about Special IP Addresses in IPv4

Classless Addressing in IPv4

26th December 2019 by Neha T 3 Comments

Classless addressing is a concept of addressing the IPv4 addresses. It was adopted after the failure of classful addressing. The classful addressing leads to wastage of addresses as it assigns a fixed-size block of addresses to the customer. But, the classless addressing assigns a block of addresses to the customer according to its requirement which prevents the wastage of … [Read more...] about Classless Addressing in IPv4

Classful Addressing in IPv4

24th December 2019 by Neha T 2 Comments

Classful addressing is a concept that divides the available address space of IPv4 into five classes namely A, B, C, D & E. Nowadays, this concept has become obsolete and has been replaced with classless addressing. IP addresses, before 1993 use the classful addressing where classes have a fixed number of blocks and each block has a fixed number of hosts. In this section, we … [Read more...] about Classful Addressing in IPv4

Connection Oriented and Connectionless Services

16th December 2019 by Neha T Leave a Comment

Connection oriented and Connectionless services are the two data transmission services provided by the network layer protocols and transport layer protocols. The Connection oriented services establish a connection prior to sending the packets belonging to the same message from source to the destination. On the other hand, the connectionless service considers each packet … [Read more...] about Connection Oriented and Connectionless Services

Difference Between Entity and Attribute in Database

10th December 2019 by Neha T 2 Comments

Entity and attribute are the most common terms of DBMS. The fundamental difference between the entity and attribute is that an entity is an object that exists in a real-world and can be easily distinguished among all other objects of real-world whereas, the attributes define the characteristics or the properties of an entity on the basis of which it is easily distinguishable … [Read more...] about Difference Between Entity and Attribute in Database

Aggregate Functions in SQL

5th December 2019 by Neha T Leave a Comment

Aggregate functions in SQL evaluate the set of values and return a single value as a result. SQL has five aggregate functions count, average, maximum, minimum, sum. The aggregate functions, 'sum' and 'average' operate only on numeric values. While count, maximum, minimum can also operate on non-numeric data such as string. In this section, we will discuss the steps to … [Read more...] about Aggregate Functions in SQL

Set Operations in SQL

4th December 2019 by Neha T Leave a Comment

Set operations integrate the outcome of two entirely independent SQL queries. There are three set operations in SQL Union, Intersect, Except. These set operations are based on the principles of mathematical set theory. The set operations are applicable to the type compatible relations only, that means relations involved in operation must have an 'equal number of attributes' and … [Read more...] about Set Operations in SQL

Integrity Constraints in DBMS

23rd November 2019 by Neha T Leave a Comment

­Integrity constraints ensure that when the authorized users modify the database they do not disturb the data consistency. Integrity constraints are introduced while designing the database schema. The constraints are specified within the SQL DDL command like 'create table' and 'alter table' command. Let’s see, the general form of 'create table' and 'alter table' command … [Read more...] about Integrity Constraints in DBMS

Null Value in SQL

21st November 2019 by Neha T 1 Comment

Null Value in SQL is the special value, allocated to an attribute in a relation that indicates, the information regarding the corresponding attribute is either unknown or doesn’t even exist. In this section, we will discuss the null values in detail. What is the Null Value in SQL? The null value assigned to an attribute in a relation specifies that the value for the … [Read more...] about Null Value in SQL

SQL Data Definition Language (DDL)

19th November 2019 by Neha T Leave a Comment

SQL Data Definition Language defines the set of relations in a database. SQLs DDL specifies the schema of each relation in the database and also the relevance between the relations in a database. So in this section, we will discuss SQL data definition language in detail. Content: SQL Data Definition Language Data Definition Language in SQL SQL Data Types DDL … [Read more...] about SQL Data Definition Language (DDL)

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