Question

Enlist some services provided by a server on a network.

Answer 1

Services provided by a server on a network are many. Some of the services provided are :
World wide web, E-mail, file server, online games. file sharing,video,time service, Directory services. instant messaging, printing etc. 

Clients and servers often have other hardwares associated with them also. For example Domain Name Service.  

Answer 2

1) directory services

2)centralised virus scanning

3)centralised backups

4) equipment/ resource sharing

Hope this helps