Answer:
The main difference between LAN, MAN and WAN is the scope and coverage of the networks. LAN (Local area network) is usually used to connect computers in smaller distances such as in a building or in offices. They use various topologies such as bus topology, ring topology, star typology etc to connect the computers and share information only among the computers connected in LAN. A Metropolitan Network covers larger coverage than LAN and is usually used for connecting a city rather than single organization. A Wide Area Network is collection of networks or many LANS. The perfect example of WAN is internet which connects thousands and millions of networks. Another factor which distinguishes between LAN, MAN and WAN is that LAN and MAN are owned by certain entities such as government, educational institutions or organizations whereas WAN (i.e. Internet) is not owned by anyone.
Answer:
Windows Server operating systems are a popular choice for a network because they use wizards and setup devices as the user operating system, making it easier to set up network features work on networks that include using Windows operating systems as well as Mac OS, NetWare, or UNIX
Explanation:
Windows operating system is popular than any other operating system for certain reasons:
1. It provides GUI feature which any layman can access and learn easily
2. The compatibility that it provides makes it more popular
3. It supports most of the software program available in the market
4. The design of Windows is more comfortable when compared to other open source operating system.
Only thing is that it is not a free-ware. Licence needs to be purchased to use it.
<span>d) all of these is your correct answer</span>
Answer:
SELECT DISTINCT VendorName FROM Vendors
WHERE VendorName= ANY (SELECT VendorName FROM Vendors JOIN Invoices ON Vendors.VendorID = Invoices.VendorID) ORDER BY VendorName;
Explanation:
All bold faced words are sql keywords for different purposes. The subquery return the all values which matches the join condition and main query will choose only distinct values and make them in order of VendorName.
There many other queries also return the same result as returned by given query.
