What is Topology

Nielit O Level Solved Paper

Internet and Web Design

Q: Explain in brief: Bus, Star and Ring Network Topologies

Physical and logical arrangement of devices with a network is known as Topology.

Bus Topology

A bus topology is a network setup in which each computer and network device are connected to a single cable or backbone.A signal from the source is broadcasted and it travels to all workstations connected to bus cable. Although the message is broadcasted but only the intended recipient, whose MAC address or IP address matches, accepts it. If the MAC /IP address of machine doesn’t match with the intended address, machine discards the signal.

Microsoft Word Table Index

Microsoft Word Table Index,Table of content and reference Tab in HIndi

Microsoft word has reference tab which enable you to male table of index,table of content,Figure Index and many more cover in this video.

Describe the ISDN

Q 5 (a). Describe the ISDN ?

Integrated Services Digital Network (ISDN)

Integrated Services Digital Network (ISDN) is a telephone system network. It is a wide area network which is widely available. Before to the ISDN, the telephone system was viewed as a way to transport only voice, with some special services available for data. The key feature of the ISDN is that it integrates speech and data on the same lines, adding features that were not available in the classic telephone system.

Database relationship

Microsoft Access is an example of relational database. In relational data base we can join a table to more than one table which makes relationship. With this capability our access database becomes more powerful than non-relational data base category. Consistency of database become easy and easily achieve by database on automatically.  If you want to make relationship in access database then you need at least two tables and one field must be common in both tables. For example, we are going to make relationship between two tables’ student and canteen. Student table store record of student and canteen stores what the products students are having. So in this type of relationship student is master table and canteen is related table. So student table need a primary key which uniquely identified a record from student table. Canteen table must have a key which match the data type of student table primary key which further known as foreign key.