Answer:
last one check it and the second one
Explanation:
Answer: Indexed
Explanation: Indexed property in the database system is for indexing .In this process reduction of the record/disk numbers results in the increase in the optimized performance. The structure of the index is in column form.
This technique rapidly provides the data from the table containing database when every query arises or requirement is proposed. Therefore the efficiency of the database increases.
Other options are incorrect because validation rule and text are regarding the verification of the data user and text respectively and expression is defined as the group of one or more value.Thus the correct option is indexed.
An Excel worksheet is a single spreadsheet that contains cells organized by rows and columns. A worksheet begins with row number one and column A. Each cell can contain a number, text or formula. A cell can also reference another cell in the same worksheet, the same workbook or a different workbook.
Answer:
Wireless WAN like VSAT and WIMAX.
Explanation:
WAN or wide area network is a form of network meant for long distance communication between sites. It is made up of interconnecting local area networks spanning from a town to global communication of branches in an organisation.
For local area networks to be connected together to make a WAN, a dedicated high speed cable connection must be installed between sites. Fiber optics, among others, is the widely used dedicated WAN backbone connection. Cable connections are faster and moderately secure.
A VSAT is a wireless network connection method, where networks are connected using satellite dishes in remote networks, in the line of sight to a satellite, for WAN communication. It is not as fast or as secure as the cable connection, but can be used in remote area, where ISP in not available.