which is the symbol used to sum in spreadsheet
Answers
Answer: Σ
Explanation:
To use a shortcut instead, hold down the Alt key, then type ALT+2+2+8 (Alt 228) to insert the sum (Σ) symbol.
A network is the group of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams. Network is capable of sharing Software and Hardware resources between many users.
Advantages of Network:
Sharing files, data and information : You can share data program and different resources with it. It is only possible because all the files are stored on server (Central computers, Server allows sharing of these files).
Sharing Hardware and software : you can share hardware and software within network easily. For example, a printer can be shared among the users in a network so that there's no need to have individual printers for each and every computer in the company.
Communication Media : Network provides a very fast communication media e.g. E-mail is used as a fast media in different offices.
File Integrity : File integrity remains continuous due to network. It saves much time. Network helps in fast saving and sharing of files.
Cost effective : We can share costly input and output devices like printer with network . It reduces the cost of system.
Reliability : Network ensures use of many resource to us e.g. when hardware fails, information can be recovered from other computer with the help of network.
Flexibility : It provides more flexibility because in it there is a possibility of connecting devices of different businessmen.
Backup : It is difficult to get back up of a file from different computers. But it is easy to take backup from server if we are linked with network.
Security : Network provides security to us. Network user can run a few files or applications.
Speed : Sharing and transferring files within networks is very rapid, depending on the type of network. This will save time while maintaining the integrity of files.
Disadvantages of Network :
Network Failure : All the central facilities may fail due to network failure.
Management : Management of whole network is tough.
Security : Danger of security is always present on network. Data can be misused on network.
Expensive to Build : Building a network is a serious business in many occasions, especially for
Large scale organizations : Cables and other hardware are very pricey to buy and replace.